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Articles de revues sur le sujet « Multidentate polymer »

Auteur : Grafiati
Publié le 9 mars 2023
Mis à jour le 10 mars 2023

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1

Li, Yameng, Xiaozeng Zhang, Zhicong Chao, Minglong Gan, Jinsheng Liao, Xinyu Ye, Weixiong You, Junxiang Fu et Herui Wen. « A multidentate polymer microreactor route for green mass fabrication of mesoporous NaYF4 clusters ». Chemical Communications 58, no 11 (2022) : 1764–67. http://dx.doi.org/10.1039/d1cc06255g.

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Zhang, Rong, Tao Deng, Jie Wang, Gang Wu, Sirui Li, Yueqing Gu et Dawei Deng. « Organic-to-aqueous phase transfer of Zn–Cu–In–Se/ZnS quantum dots with multifunctional multidentate polymer ligands for biomedical optical imaging ». New Journal of Chemistry 41, no 13 (2017) : 5387–94. http://dx.doi.org/10.1039/c7nj00573c.

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Gui, Rijun, Ajun Wan, Xifeng Liu, Wen Yuan et Hui Jin. « Retracted Article : Water-soluble multidentate polymers compactly coating Ag2S quantum dots with minimized hydrodynamic size and bright emission tunable from red to second near-infrared region ». Nanoscale 6, no 10 (2014) : 5467–73. http://dx.doi.org/10.1039/c4nr00282b.

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Tang, Qiuling, Jian Zhou, Filipe A. Almeida Paz, Lianshe Fu, Hong Xiao, Qi Zhou et Ju Li. « A novel 3-D photoluminescent cuprous chloride polymer based on bifunctional imidazolate/tetrazolate bridges ». Dalton Transactions 46, no 5 (2017) : 1372–76. http://dx.doi.org/10.1039/c6dt04673h.

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The interconnection of rare [Cu2Cl]+cations and multidentate 1-tetrazole-4-imidazole-benzene bridging ligands gives a novel 3-D cuprous chloride polymer with a bimodalfsc-3,5-Cmce-2 topological type (L−ligand and Cu+ion: orange and blue).
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Bulatova, Margarita, Rajendhraprasad Tatikonda, Pipsa Hirva, Evgeny Bulatov, Elina Sievänen et Matti Haukka. « Controlling the crystal growth of potassium iodide with a 1,1′-bis(pyridin-4-ylmethyl)-2,2′-biimidazole ligand (L) – formation of a linear [K4I4L4]n polymer with cubic [K4I4] core units ». CrystEngComm 20, no 26 (2018) : 3631–33. http://dx.doi.org/10.1039/c8ce00483h.

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Lu, Xin-Hua, et Kai-Long Zhong. « A new three-dimensional manganese(II) coordination polymer based on the 1,3,5-tris[(1H-imidazol-1-yl)methyl]benzene ligand ». Acta Crystallographica Section C Structural Chemistry 72, no 11 (24 octobre 2016) : 895–900. http://dx.doi.org/10.1107/s2053229616015965.

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The self-assembly of coordination polymers and the crystal engineering of metal–organic coordination frameworks have attracted great interest, but it is still a challenge to predict and control the compositions and structures of the complexes. Employing multidentate organic ligands and suitable metal ions to construct inorganic–organic hybrid materials through metal–ligand coordination and hydrogen-bonding interactions has become a major strategy. Recently, imidazole-containing multidentate ligands that contain an aromatic core have received much attention. A new three-dimensional MnIIcoordination polymer based on 1,3,5-tris[(1H-imidazol-1-yl)methyl]benzene, namely poly[(ethane-1,2-diol-κO)(μ-sulfato-κ2O:O′){μ3-1,3,5-tris[(1H-imidazol-1-yl)methyl]benzene-κ3N:N′:N′′}manganese(II)], [Mn(SO4)(C18H18N6)(C2H6O2)]n, was synthesized and characterized by elemental analysis, IR spectroscopy and single-crystal X-ray diffraction. Crystal structural analysis shows that there are two kinds of crystallographically independent MnIIcentres, each lying on a centrosymmetric position and having a similar six-coordinated octahedral structure. One is coordinated by four N atoms from four 1,3,5-tris[(1H-imidazol-1-yl)methyl]benzene (timb) ligands and two O atoms from two different bridging sulfate anions. The second is surrounded by two timb N atoms and four O atoms, two from sulfate anions and two from two ethane-1,2-diol ligands. The tripodal timb ligand bridges neighbouring MnIIcentres to generate a two-dimensional layered structure running parallel to theabplane. Adjacent layers are further bridged by sulfate anions, resulting in a three-dimensional structure with3,4,6-ctopology. Thermogravimetric analysis of the title polymer shows that it is stable up to 533 K. The first weight loss between 533 and 573 K corresponds to the release of coordinated ethane-1,2-diol molecules, and further decomposition occurred at 648 K.
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Hou, Shaocong, Yuzheng Guo, Yuguo Tang et Qimin Quan. « Synthesis and Stabilization of Colloidal Perovskite Nanocrystals by Multidentate Polymer Micelles ». ACS Applied Materials & ; Interfaces 9, no 22 (25 mai 2017) : 18417–22. http://dx.doi.org/10.1021/acsami.7b03445.

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Blasi, Delia, Pierluigi Mercandelli et Lucia Carlucci. « Supramolecular Frameworks and a Luminescent Coordination Polymer from New β-Diketone/Tetrazole Ligands ». Inorganics 10, no 4 (18 avril 2022) : 55. http://dx.doi.org/10.3390/inorganics10040055.

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Mixed multidentate linkers with donor groups of different types can be fruitfully exploited in the self-assembly of coordination polymers (CPs) and Metal-Organic Frameworks (MOFs). In this work we develop new ligands containing a β-diketone chelating functionality, to better control the stereochemistry at the metal center, and tetrazolyl multidentate bridging groups, a combination not yet explored for networking with metal ions. The new ligands, 1,3-bis(4-(1H-tetrazol-5-yl)phenyl)-1,3-propanedione (H3L1) and 1-phenyl-3-(4-(1H-tetrazol-5-yl)phenyl)-1,3-propanedione (H2L2), are synthesized from the corresponding nitrile precursors by [2+3] dipolar cycloaddition of azide under metal-free catalytic conditions. Crystal structure analysis evidences the involvement of tetrazolyl fragments in multiple hydrogen bonding giving 2D and 1D supramolecular frameworks. Reactivity of the new ligands with different metal salts indicates good coordinating ability, and we report the preparation and structural characterization of the tris–chelate complex [Fe(HL1)3]3− (1) and the homometallic 2D CP [ZnL2(DMSO)] (2). In compound 1 only the diketonate donor is used, whereas the partially deprotonated tetrazolyl groups are involved in hydrogen bonding, giving rise to a 2D supramolecular framework of (6,3)IIa topological type. In compound 2 the ligand is completely deprotonated and uses both the diketonate donor (chelating) and the tetrazolate fragment (bridging) to coordinate the Zn(II) ions. The resulting neutral 2D network of sql topology shows luminescence in the solid state, which is red shifted with respect to the free ligand. Interestingly, it can be easily exfoliated in water to give a luminescent colloidal solution.
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Ma, Liang, Chunlai Tu, Phuong Le, Shweta Chitoor, Sung Jun Lim, Mohammad U. Zahid, Kai Wen Teng, Pinghua Ge, Paul R. Selvin et Andrew M. Smith. « Multidentate Polymer Coatings for Compact and Homogeneous Quantum Dots with Efficient Bioconjugation ». Journal of the American Chemical Society 138, no 10 (8 mars 2016) : 3382–94. http://dx.doi.org/10.1021/jacs.5b12378.

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Smith, Andrew M., et Shuming Nie. « Minimizing the Hydrodynamic Size of Quantum Dots with Multifunctional Multidentate Polymer Ligands ». Journal of the American Chemical Society 130, no 34 (août 2008) : 11278–79. http://dx.doi.org/10.1021/ja804306c.

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Akhila Maheswari, M., et M. S. Subramanian. « New Multidentate Ion‐Selective Grafted Polymer for Preconcentration of Lanthanides and Actinides ». Analytical Letters 38, no 9 (juillet 2005) : 1331–49. http://dx.doi.org/10.1081/al-200062253.

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Huang, Bo, Yanqiong Li et Wen Zeng. « Application of Metal-Organic Framework-Based Composites for Gas Sensing and Effects of Synthesis Strategies on Gas-Sensitive Performance ». Chemosensors 9, no 8 (14 août 2021) : 226. http://dx.doi.org/10.3390/chemosensors9080226.

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Gas sensing materials, such as semiconducting metal oxides (SMOx), carbon-based materials, and polymers have been studied in recent years. Among of them, SMOx-based gas sensors have higher operating temperatures; sensors crafted from carbon-based materials have poor selectivity for gases and longer response times; and polymer gas sensors have poor stability and selectivity, so it is necessary to develop high-performance gas sensors. As a porous material constructed from inorganic nodes and multidentate organic bridging linkers, the metal-organic framework (MOF) shows viable applications in gas sensors due to its inherent large specific surface area and high porosity. Thus, compounding sensor materials with MOFs can create a synergistic effect. Many studies have been conducted on composite MOFs with three materials to control the synergistic effects to improve gas sensing performance. Therefore, this review summarizes the application of MOFs in sensor materials and emphasizes the synthesis progress of MOF composites. The challenges and development prospects of MOF-based composites are also discussed.
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He, Yuan-Chun, Jie Zhang, Li-Yuan Xiao, Zi-Han Yuan, Yang Yu, Yan Wang, Kunlei Zhu et Wei-Qiu Kan. « A novel coordination polymer based on a new multidentate ligand : synthesis, structure and properties ». CrystEngComm 21, no 46 (2019) : 7166–71. http://dx.doi.org/10.1039/c9ce01307e.

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Su, Feng, Liping Lu, Chengyong Zhou, Xiaoxia Wang, Long Sun et Chun Han. « A three-dimensional ZnIIcoordination polymer constructed from 1,1′-biphenyl-2,2′,4,4′-tetracarboxylate and 1,4-bis(1H-imidazol-1-yl)benzene ligands exhibiting photoluminescence ». Acta Crystallographica Section C Structural Chemistry 73, no 2 (12 janvier 2017) : 72–77. http://dx.doi.org/10.1107/s2053229617000213.

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Ligands based on polycarboxylic acids are excellent building blocks for the construction of coordination polymers; they may bind to a variety of metal ions and form clusters, as well as extended chain or network structures. Among these building blocks, biphenyltetracarboxylic acids (H4bpta) withC2symmetry have recently attracted attention because of their variable bridging and multidentate chelating modes. The new luminescent three-dimensional coordination polymer poly[(μ5-1,1′-biphenyl-2,2′,4,4′-tetracarboxylato)bis[μ2-1,4-bis(1H-imidazol-1-yl)benzene]dizinc(II)], [Zn2(C16H6O8)(C12H10N4)]n, was synthesized solvothermally and characterized by single-crystal X-ray diffraction, elemental analysis and IR spectroscopy. The crystal structure contains two crystallographically independent ZnIIcations. Both metal cations are located on twofold axes and display distorted tetrahedral coordination geometries. Neighbouring ZnIIcentres are bridged by carboxylate groups in thesyn–antimode to form one-dimensional chains. Adjacent chains are linked through 1,1′-biphenyl-2,2′,4,4′-tetracarboxylate and 1,4-bis(1H-imidazol-1-yl)benzene ligands to form a three-dimensional network. In the solid state, the compound exhibits blue photoluminescence and represents a promising candidate for a thermally stable and solvent-resistant blue fluorescent material.
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Li, Guo-Rong, Chen-Chao Xie, Zhu-Rui Shen, Ze Chang et Xian-He Bu. « Cobalt oxide 2D nano-assemblies from infinite coordination polymer precursors mediated by a multidentate pyridyl ligand ». Dalton Transactions 45, no 18 (2016) : 7866–74. http://dx.doi.org/10.1039/c6dt00332j.

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Malpicci, Daniele, Delia Blasi, Daniele Marinotto, Alessandra Forni, Elena Cariati, Elena Lucenti et Lucia Carlucci. « A Rare Structural Motif for a Luminescent Cu(I) Coordination Polymer with 3-(Pyridin-2-yl)triimidazotriazine ». Crystals 13, no 1 (14 janvier 2023) : 149. http://dx.doi.org/10.3390/cryst13010149.

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The coordination ability of the pyridine derivative of cyclic triimidazole, namely 3-(pyridin-2-yl)triimidazotriazine (TT-Py) towards Cu(I) was explored. TT-Py is an appealing nitrogen-rich ligand characterized by the presence of three imidazole nitrogen atoms with trigonal symmetry and a pyridine moiety, available for coordination to metal ions. The multidentate nature of TT-Py allows to isolate, by reaction with CuI at room temperature, the one-dimensional coordination network [Cu2I2(TT-Py)]n (1). 1 is characterized by a rare structural network built-up by the combination in a 1:2 ratio of two common motifs for Cu(I) halides coordination polymers, which are the double-stranded stair and the zig-zag chain. 1 displays one broad long-lived emission in the solid state, which has been associated, by the support of DFT and TDDFT calculation, with low-energy transitions of MLCT or XMLCT character.
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Wang, Mingfeng, Tieneke E. Dykstra, Xudong Lou, Mayrose R. Salvador, Gregory D. Scholes et Mitchell A. Winnik. « Colloidal CdSe Nanocrystals Passivated by a Dye-Labeled Multidentate Polymer : Quantitative Analysis by Size-Exclusion Chromatography ». Angewandte Chemie International Edition 45, no 14 (27 mars 2006) : 2221–24. http://dx.doi.org/10.1002/anie.200502538.

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Oberoi, Deepa, Uday Shankar, Parveen Dagar, Satyajit Sahu et Anasuya Bandyopadhyay. « Electrochromic and bipolar memory switching properties of novel Eu(III)-polymer of multidentate Schiff’s base ligand ». Journal of Materials Science : Materials in Electronics 31, no 22 (6 octobre 2020) : 20345–59. http://dx.doi.org/10.1007/s10854-020-04554-6.

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Wang, Mingfeng, Tieneke E. Dykstra, Xudong Lou, Mayrose R. Salvador, Gregory D. Scholes et Mitchell A. Winnik. « Colloidal CdSe Nanocrystals Passivated by a Dye-Labeled Multidentate Polymer : Quantitative Analysis by Size-Exclusion Chromatography ». Angewandte Chemie 118, no 14 (27 mars 2006) : 2279–82. http://dx.doi.org/10.1002/ange.200502538.

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Li-Hui, YUWEN, XUE Bing et WANG Lian-Hui. « Synthesis of High Quality CdTe Quantum Dots in Aqueous Solution Using Multidentate Polymer Ligands under Microwave Irradiation ». Acta Physico-Chimica Sinica 30, no 5 (2014) : 994–1000. http://dx.doi.org/10.3866/pku.whxb201403131.

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Qiao, Chengfang, Xia Gao, Qi Tang, Jianfang Wang, Yulin Gao, Meili Zhang, Zhengqiang Xia, Haitao Han, Chunxin Zhao et Chunsheng Zhou. « Synthesis, Fluorescence, and Antifungal Activity of a Bifunctional Lead( II ) Coordination Polymer Based on Multidentate Acylhydrazone Ligand ». Bulletin of the Korean Chemical Society 41, no 12 (3 novembre 2020) : 1124–27. http://dx.doi.org/10.1002/bkcs.12127.

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Huang, Qiu-Ying, Wei Liu, Yi Yang et Xiang-Ru Meng. « A new one-dimensional ZnIIcoordination polymer based on 2-[(1H-imidazol-1-yl)methyl]-1H-benzimidazole and benzene-1,2-dicarboxylate ». Acta Crystallographica Section C Structural Chemistry 71, no 11 (27 octobre 2015) : 1017–21. http://dx.doi.org/10.1107/s205322961501966x.

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Multidentate N-heterocyclic compounds form a variety of metal complexes with many intriguing structures and interesting properties. The title coordination polymer,catena-poly[zinc(II)-bis{μ-2-[(1H-imidazol-1-yl)methyl]-1H-benzimidazole}-κ2N3:N3′;N3′:N3-zinc(II)-bis(μ-benzene-1,2-dicarboxylato)-κ2O1:O2;κ3O1,O1′:O2], [Zn2(C8H4O4)2(C11H10N4)2]n, has been synthesized by the reaction of Zn(NO3)2with 2-[(1H-imidazol-1-yl)methyl]-1H-benzimidazole (imb) and benzene-1,2-dicarboxylic acid (H2bdic) under hydrothermal conditions. There are two crystallographically distinct imb ligands [imb(A) and imb(B)] in the structure which adopt very similar coordination geometries. The imb(A) ligand bridges two symmetry-related Zn1 ions, yielding a binuclear [(Zn1)2{imb(A)}2] unit, and the imb(B) ligand bridges two symmetry-related Zn2 ions resulting in a binuclear [(Zn2)2{imb(B)}2] unit. The above-mentioned binuclear units are further connected alternately by pairs of bridging bdic2−ligands, forming an infinite one-dimensional chain. These one-dimensional chains are further connected through N—H...O hydrogen bonds, leading to a two-dimensional layered structure. In addition, the title polymer exhibits good fluorescence properties in the solid state at room temperature.
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Huang, Qiu-Ying, Yi Yang et Xiang-Ru Meng. « A new two-dimensional ZnIIcoordination polymer constructed by a multidentate N-heterocyclic ligand and 5-carboxybenzene-1,3-dicarboxylate ». Acta Crystallographica Section C Structural Chemistry 71, no 8 (15 juillet 2015) : 701–5. http://dx.doi.org/10.1107/s2053229615013224.

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In the coordination polymer, poly[[{μ-1-[(1H-benzimidazol-2-yl)methyl]-1H-imidazole-κ2N:N′}(μ-5-carboxybenzene-1,3-dicarboxylato-κ2O1:O3)zinc(II)] dimethylformamide monosolvate pentahydrate], {[Zn(C9H4O6)(C11H10N4)]·C3H7NO·5H2O}n, the ZnIIion is coordinated by two N atoms from two symmetry-related 1-[(1H-benzimidazol-2-yl)methyl]-1H-imidazole (bmi) ligands and two O atoms from two symmetry-related 5-carboxybenzene-1,3-dicarboxylate (Hbtc2−) ligands in a slightly distorted tetrahedral geometry. The ZnIIions are bridged by Hbtc2−and bmi ligands, leading to a 4-connected two-dimensional network with the topological notation (44.62). Adjacent layers are further connected by 12 kinds of hydrogen bonds and also by π–π interactions, resulting in a three-dimensional supramolecular architecture in the solid state.
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Zhou, Lian, Pei-Dong Shi, Xiao-Kun Guo, Xiu-Cun Feng, Lin-Lin Wang et Jun Zhang. « A new lanthanum coordination polymer built from a semi-rigid tripodal carboxylic acid ligand : synthesis, crystal structure and properties ». Acta Crystallographica Section C Structural Chemistry 75, no 9 (19 août 2019) : 1280–85. http://dx.doi.org/10.1107/s2053229619011240.

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By employing the semi-rigid multidentate carboxylic acid ligand 4,4′,4′′-{[(2,4,6-trimethylbenzene-1,3,5-triyl)tris(methylene)]tris(oxy)}tribenzoic acid (denoted H3 L), a new lanthanum coordination polymer, namely poly[[bis(dimethylformamide)(μ6-4,4′,4′′-{[(2,4,6-trimethylbenzene-1,3,5-triyl)tris(methylene)]tris(oxy)}tribenzoato)lanthanum(III)] dimethylformamide tetrasolvate 0.25-hydrate], {[La(C33H27O9)(C3H7NO)2]·4C3H7NO·0.25H2O} n or {[La(L)(DMF)2]·4(DMF)·0.25(H2O)} n (DMF is dimethylformamide) (1), was prepared and characterized by single-crystal X-ray diffraction, elemental analysis, thermogravimetric analysis, IR spectroscopy and photoluminescence studies. The asymmetric unit contains one LaIII cation, one anionic L 3− ligand, two coordinated DMF molecules, four free DMF molecules and one-quarter of a free water molecule. Compound 1 possesses (3,6)-connected two-dimensional kgd topology sheets consisting of secondary building units of La2 clusters and L 3− ligands, which further stack into three-dimensional supramolecular networks through π–π interactions. Compound 1 exhibits a photoluminescence emission at room temperature, with a peak at 410 nm, owing to a ligand-centred excited state.
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Niu, Xiang-Long, Lin Wei, Jian-Cheng Liu, Wan-He Jia, Jian-Ping Ma, Lei Wang, Jian-Cheng Wang et Yu-Bin Dong. « Syntheses and structures of three macrocyclic supramolecular complexes and one ZnII-containing coordination polymer generated from a semi-rigid multidentate N-containing ligand ». Acta Crystallographica Section C Structural Chemistry 77, no 1 (1 janvier 2021) : 29–39. http://dx.doi.org/10.1107/s2053229620016083.

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Semirigid organic ligands can adopt different conformations to construct coordination polymers with more diverse structures when compared to those constructed from rigid ligands. A new asymmetric semirigid organic ligand, 4-{2-[(pyridin-3-yl)methyl]-2H-tetrazol-5-yl}pyridine (L), has been prepared and used to synthesize three bimetallic macrocyclic complexes and one coordination polymer, namely, bis(μ-4-{2-[(pyridin-3-yl)methyl]-2H-tetrazol-5-yl}pyridine)bis[dichloridozinc(II)] dichloromethane disolvate, [Zn2Cl4(C12H10N6)2]·2CH2Cl2, (I), the analogous chloroform monosolvate, [Zn2Cl4(C12H10N6)2]·CHCl3, (II), bis(μ-4-{2-[(pyridin-3-yl)methyl]-2H-tetrazol-5-yl}pyridine)bis[diiodidozinc(II)] dichloromethane disolvate, [Zn2I4(C12H10N6)2]·2CH2Cl2, (III), and catena-poly[[[diiodidozinc(II)]-μ-4-{2-[(pyridin-3-yl)methyl]-2H-tetrazol-5-yl}pyridine] chloroform monosolvate], {[ZnI2(C12H10N6)]·CHCl3} n , (IV), by solution reaction with ZnX 2 (X = Cl and I) in a CH2Cl2/CH3OH or CHCl3/CH3OH mixed solvent system at room temperature. Complex (I) is isomorphic with complex (III) and has a bimetallic ring possessing similar coordination environments for both of the ZnII cations. Although complex (II) also contains a bimetallic ring, the two ZnII cations have different coordination environments. Under the influence of the I− anion and guest CHCl3 molecule, complex (IV) displays a significantly different structure with respect to complexes (I)–(III). C—H...Cl and C—H...N hydrogen bonds, and π–π stacking or C—Cl...π interactions exist in complexes (I)–(IV), and these weak interactions play an important role in the three-dimensional structures of (I)–(IV) in the solid state. In addition, the fluorescence properties of L and complexes (I)–(IV) were investigated.
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Chen, Zhen, Yanwen Sun, Zi-an Liu, Ning Wang, Xue Yang, Xiaomeng You et Xiaozhong Wang. « A three-dimensional ZnII coordination network based on 5,5′-methylenebis(2,4,6-trimethylisophthalic acid) and 2,7-bis(1H-imidazol-1-yl)fluorene : synthesis, structure and luminescence properties ». Acta Crystallographica Section C Structural Chemistry 75, no 1 (1 janvier 2019) : 8–14. http://dx.doi.org/10.1107/s2053229618016285.

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In recent years, coordination polymers constructed from multidentate carboxylate ligands and N-containing ligands have attracted much attention since these ligands can adopt a rich variety of coordination modes which can lead to crystalline products with intriguing structures and interesting properties. A new coordination polymer, namely poly[[diaqua[μ-2,7-bis(1H-imidazol-1-yl)fluorene-κ2 N 3:N 3′][μ-5,5′-methylenebis(3-carboxy-2,4,6-trimethylbenzoato)-κ2 O 1:O 1′]zinc(II)] hemihydrate], {[Zn(C23H22O8)(C19H14N4)(H2O)2]·0.5H2O} n , 1, was prepared by the self-assembly of Zn(NO3)2·6H2O with 5,5′-methylenebis(2,4,6-trimethylisophthalic acid) (H4BTMIPA) and 2,7-bis(1H-imidazol-1-yl)fluorene (BIF) under solvothermal conditions. The structure of 1 was determined by elemental analysis, single-crystal X-ray crystallography, powder X-ray diffraction, IR spectroscopy and thermogravimetric analysis. Each ZnII ion is six-coordinated by two O atoms from two H2BTMIPA2− ligands, by two N atoms from two BIF ligands and by two water molecules, forming a distorted octahedral ZnN2O4 coordination geometry. Adjacent ZnII ions are linked by H2BTMIPA2− ligands and BIF ligands, leading to the formation of a two-dimensional (2D) (4,4)-sql network, and intermolecular hydrogen-bonding interactions connect the 2D layer structure into the three-dimensional (3D) supramolecular structure. Each 2D layer contains two kinds of helices with the same direction, which are opposite in adjacent layers. The luminescence properties of complex 1 in the solid state have also been investigated.
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Zhang, Li-Yang, Li-Ping Lu et Si-Si Feng. « A two-dimensional mixed-valence CuII/CuIcoordination polymer constructed from 2-(pyridin-3-yl)-1H-imidazole-4,5-dicarboxylate ». Acta Crystallographica Section C Structural Chemistry 72, no 8 (22 juillet 2016) : 652–57. http://dx.doi.org/10.1107/s205322961601161x.

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Coordination polymers are a thriving class of functional solid-state materials and there have been noticeable efforts and progress toward designing periodic functional structures with desired geometrical attributes and chemical properties for targeted applications. Self-assembly of metal ions and organic ligands is one of the most efficient and widely utilized methods for the construction of CPs under hydro(solvo)thermal conditions. 2-(Pyridin-3-yl)-1H-imidazole-4,5-dicarboxylate (HPIDC2−) has been proven to be an excellent multidentate ligand due to its multiple deprotonation and coordination modes. Crystals of poly[aquabis[μ3-5-carboxy-2-(pyridin-3-yl)-1H-imidazole-4-carboxylato-κ5N1,O5:N3,O4:N2]copper(II)dicopper(I)], [CuIICuI2(C10H5N3O4)2(H2O)]n, (I), were obtained from 2-(pyridin-3-yl)-1H-imidazole-4,5-dicarboxylic acid (H3PIDC) and copper(II) chloride under hydrothermal conditions. The asymmetric unit consists of one independent CuIIion, two CuIions, two HPIDC2−ligands and one coordinated water molecule. The CuIIcentre displays a square-pyramidal geometry (CuN2O3), with twoN,O-chelating HPIDC2−ligands occupying the basal plane in atransgeometry and one O atom from a coordinated water molecule in the axial position. The CuIatoms adopt three-coordinated Y-shaped coordinations. In each [CuN2O] unit, deprotonated HPIDC2−acts as anN,O-chelating ligand, and a symmetry-equivalent HPIDC2−ligand acts as an N-atom donorviathe pyridine group. The HPIDC2−ligands in the polymer serve as T-shaped 3-connectors and adopt a μ3-κ2N,O:κ2N′,O′:κN′′-coordination mode, linking one CuIIand two CuIcations. The Cu cations are arranged in one-dimensional –Cu1–Cu2–Cu3– chains along the [001] direction. Further crosslinking of these chains by HPIDC2−ligands along thebaxis in a –Cu2–HPIDC2−–Cu3–HPIDC2−–Cu1– sequence results in a two-dimensional polymer in the (100) plane. The resulting (2,3)-connected net has a (123)2(12)3topology. Powder X-ray diffraction confirmed the phase purity for (I), and susceptibilty measurements indicated a very weak ferromagnetic behaviour. A thermogravimetric analysis shows the loss of the apical aqua ligand before decomposition of the title compound.
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Fang, Chun, Xiao-Ying Qi, Qu-Li Fan, Lian-Hui Wang et Wei Huang. « A facile route to semiconductor nanocrystal-semiconducting polymer complex using amine-functionalized rod–coil triblock copolymer as multidentate ligand ». Nanotechnology 18, no 3 (3 janvier 2007) : 035704. http://dx.doi.org/10.1088/0957-4484/18/3/035704.

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Liu, Ya-Hui, Li-Ping Lu, Miao-Li Zhu et Feng Su. « A three-dimensional mixed-valence CuII/CuIcoordination polymer constructed from biphenyl-3,4′,5-tricarboxylate and 1,4-bis(1H-imidazol-1-yl)benzene ligands ». Acta Crystallographica Section C Structural Chemistry 72, no 4 (25 mars 2016) : 358–62. http://dx.doi.org/10.1107/s2053229616004824.

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Coordination polymers (CPs) built by coordination bonds between metal ions/clusters and multidentate organic ligands exhibit fascinating structural topologies and potential applications as functional solid materials. The title coordination polymer, poly[diaquabis(μ4-biphenyl-3,4′,5-tricarboxylato-κ4O3:O3′:O4′:O5)tris[μ2-1,4-bis(1H-imidazol-1-yl)benzene-κ2N3:N3′]dicopper(II)dicopper(I)], [CuII2CuI2(C15H7O6)2(C12H10N4)3(H2O)2]n, was crystallized from a mixture of biphenyl-3,4′,5-tricarboxylic acid (H3bpt), 1,4-bis(1H-imidazol-1-yl)benzene (1,4-bib) and copper(II) chloride in a water–CH3CN mixture under solvothermal reaction conditions. The asymmetric unit consists of two crystallographically independent Cu atoms, one of which is CuII, while the other has been reduced to the CuIion. The CuIIcentre is pentacoordinated by three O atoms from three bpt3−ligands, one N atom from a 1,4-bib ligand and one O atom from a coordinated water molecule, and the coordination geometry can be described as distorted trigonal bipyramidal. The CuIatom exhibits a T-shaped geometry (CuN2O) coordinated by one O atom from a bpt3−ligand and two N atoms from two 1,4-bib ligands. The CuIIatoms are extended by bpt3−and 1,4-bib linkers to generate a two-dimensional network, while the CuIatoms are linked by 1,4-bib ligands, forming one-dimensional chains along the [20\overline{1}] direction. In addition, the completely deprotonated μ4-η1:η1:η1:η1bpt3−ligands bridge one CuIand three CuIIcations along thea(or [100]) direction to form a three-dimensional framework with a (103)2(10)2(42.6.102.12)2(42.6.82.10)2(8) topologyviaa 2,2,3,4,4-connected net. An investigation of the magnetic properties indicated a very weak ferromagnetic behaviour.
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Tan, Lianjiang, Ajun Wan, Tingting Zhao, Ran Huang et Huili Li. « Aqueous Synthesis of Multidentate-Polymer-Capping Ag2Se Quantum Dots with Bright Photoluminescence Tunable in a Second Near-Infrared Biological Window ». ACS Applied Materials & ; Interfaces 6, no 9 (5 mai 2014) : 6217–22. http://dx.doi.org/10.1021/am5015088.

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An, Feifei, et Xiaohong Zhang. « Pure photosensitizer nanocrystals stabilized with amphiphilic multidentate polymer ligands on the surface for ultra-high payload and enhanced photodynamic therapy ». Journal of Controlled Release 172, no 1 (novembre 2013) : e29. http://dx.doi.org/10.1016/j.jconrel.2013.08.065.

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Meng, Huan-Huan, Xue-Li Xia, Zen-Gang Lin et Xue-Qin Song. « A New One Dimensional Mn(III) Coordination Polymer Constructed by a Salicylamide Imine Multidentate Ligand : Structure, Magnetic and Luminescent Properties ». Journal of Inorganic and Organometallic Polymers and Materials 29, no 6 (16 avril 2019) : 1995–2002. http://dx.doi.org/10.1007/s10904-019-01158-4.

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Li, Bing-Feng, Xi-Ting Xu, Tong-Min Dong, Wan-Ying Zhou, Yang Gu, Lei Gong et Kai-Long Zhong. « Two new cadmium(II) coordination polymers based on imidazole-containing ligands : synthesis, structural characterization and fluorescence properties ». Acta Crystallographica Section C Structural Chemistry 76, no 4 (5 mars 2020) : 314–21. http://dx.doi.org/10.1107/s2053229620002594.

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The judicious selection of suitable ligands is vitally important in the construction of novel metal–organic frameworks (MOFs) with fascinating structures and interesting properties. Recently, imidazole-containing multidentate ligands have received much attention. Two new CdII coordination frameworks, namely, poly[tris{μ-1,4-bis[(1H-imidazol-1-yl)methyl]benzene-κ2 N 3:N 3′}tetrakis(nitrato-κ2 O,O′)dicadmium], [Cd2(NO3)4(C14H14N4)3] n , (I), and poly[[bis{μ3-1,3,5-tris[(1H-imidazol-1-yl)methyl]benzene-κ3 N 3:N 3′:N 3′′}cadmium] hexafluorosilicate], {[Cd(C18H18N6)2](SiF6)} n , (II), have been synthesized and characterized by elemental analysis, IR spectroscopy and single-crystal X-ray diffraction. In polymer (I), the 1,4-bis[(1H-imidazol-1-yl)methyl]benzene ligand bridges Cd2+ ions with a distorted seven-coordinated pentagonal bipyramidal geometry, forming a one-dimensional ladder chain, and the nitrate anions coordinate to the Cd2+ ions in a terminal bidentate fashion. In the crystal, adjacent chains are further connected by C—H...O hydrogen bonds to generate a two-dimensional (2D) supramolecular structure. Polymer (II) exhibits a 2D layered structure in which 1,3,5-tris[(1H-imidazol-1-yl)methyl] benzene ligands join Cd2+ centres having a six-coordinated octahedral structure. The layers are connected by hexafluorosilicate anions via C—H...F hydrogen-bond interactions, giving rise to a three-dimensional supramolecular network structure in the solid state. In addition, powder X-ray diffraction (PXRD) patterns were recorded, thermogravimetric analyses (TGA) carried out and fluorescence properties investigated.
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Gorshkov, Nikolay I., Andrey Yu Murko, Irina I. Gavrilova, Marina A. Bezrukova, Albert I. Kipper, Valerii D. Krasikov et Evgenii F. Panarin. « Synthesis of Water-Soluble Copolymers of N-vinylpyrrolidone with N-vinyldithiocarbamate as Multidentate Polymeric Chelation Systems and Their Complexes with Indium and Gallium ». Molecules 25, no 20 (14 octobre 2020) : 4681. http://dx.doi.org/10.3390/molecules25204681.

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Dithiocarbamate (DTC) derivatives of N-vinylpyrrolidone-N-vinylamine (VP–VA) copolymers were synthesized via reaction between the copolymers and carbon disulfide in alkaline medium; molecular masses of the products were 12 and 29 kDa; the VP:VDTC ratios were 94:6 and 83:17 mol.%. Complexation between the obtained DTC derivatives and metal ions (indium and gallium) was investigated. It was demonstrated that metal–DTC ligand complexes with 1:3 ratio between components were formed. Gallium metal–polymer complexes (MPC) were unstable in solution. Individual indium MPC were isolated and characterized by spectral and chromatographic methods. Unlike similar gallium MPC, they appeared to be stable in histidine challenge reaction.
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Zhou, Qian-Kun, Lin Wang, Yun Xu et Ni-Ya Li. « Construction and photoluminescence properties of a three-dimensional ZnII coordination network based on naphthalene-1,4-dicarboxylic acid and 1,6-bis(pyridin-3-yl)-1,3,5-hexatriene ». Acta Crystallographica Section C Structural Chemistry 74, no 9 (29 août 2018) : 1053–57. http://dx.doi.org/10.1107/s2053229618012068.

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In recent years, coordination polymers constructed from multidentate carboxylate and pyridyl ligands have attracted much attention because these ligands can adopt a rich variety of coordination modes and thus lead to the formation of crystalline products with intriguing structures and interesting properties. A new coordination polymer, namely poly[[μ2-1,6-bis(pyridin-3-yl)-1,3,5-hexatriene-κ2 N:N′](μ3-naphthalene-1,4-dicarboxylato-κ4 O 1,O 1′:O 4:O 4′)zinc(II)], [Zn(C12H6O4)(C16H14N2)] n , has been prepared by the self-assembly of Zn(NO3)2·6H2O, naphthalene-1,4-dicarboxylic acid (1,4-H2ndc) and 1,6-bis(pyridin-3-yl)-1,3,5-hexatriene (3,3′-bphte) under hydrothermal conditions. The title compound has been structurally characterized by IR spectroscopy, elemental analysis, powder X-ray diffraction and single-crystal X-ray diffraction analysis. Each ZnII ion is six-coordinated by four O atoms from three 1,4-ndc2− ligands and by two N atoms from two 3,3′-bphte ligands, forming a distorted octahedral ZnO4N2 coordination geometry. Pairs of ZnII ions are linked by 1,4-ndc2− ligands, leading to the formation of a two-dimensional square lattice (sql) layer extending in the ab plane. In the crystal, adjacent layers are further connected by 3,3′-bphte bridges, generating a three-dimensional architecture. From a topological viewpoint, if each dinuclear zinc unit is considered as a 6-connected node and the 1,4-ndc2− and 3,3′-bphte ligands are regarded as linkers, the structure can be simplified as a unique three-dimensional 6-connected framework with the point symbol 446108. The thermal stability and solid-state photoluminescence properties have also been investigated.
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Jian, Shou-Jun, Qian-Qian Han, Huai-Xia Yang et Xiang-Ru Meng. « A new three-dimensional zinc(II) coordination polymer involving 2-[(1H-1,2,4-triazol-1-yl)methyl]-1H-benzimidazole and benzene-1,4-dicarboxylate ligands ». Acta Crystallographica Section C Structural Chemistry 72, no 7 (14 juin 2016) : 530–35. http://dx.doi.org/10.1107/s2053229616008779.

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Metal–organic frameworks (MOFs) based on multidentate N-heterocyclic ligands involving imidazole, triazole, tetrazole, benzimidazole, benzotriazole or pyridine present intriguing molecular topologies and have potential applications in ion exchange, magnetism, gas sorption and storage, catalysis, optics and biomedicine. The 2-[(1H-1,2,4-triazol-1-yl)methyl]-1H-benzimidazole (tmb) ligand has four potential N-atom donors and can act in monodentate, chelating, bridging and tridentate coordination modes in the construction of complexes, and can also act as both a hydrogen-bond donor and acceptor. In addition, the tmb ligand can adopt different coordination conformations, resulting in complexes with helical structures due to the presence of the flexible methylene spacer. A new three-dimensional coordination polymer, poly[[bis(μ2-benzene-1,4-dicarboxylato)-κ4O1,O1′:O4,O4′;κ2O1:O4-bis{μ2-2-[(1H-1,2,4-triazol-1-yl)methyl-κN4]-1H-benzimidazole-κN3}dizinc(II)] trihydrate], {[Zn(C8H4O4)(C10H9N5)]·1.5H2O}n, has been synthesized by the reaction of ZnCl2with tmb and benzene-1,4-dicarboxylic acid (H2bdic) under solvothermal conditions. There are two crystallographically distinct bdic2−ligands [bdic2−(A) and bdic2−(B)] in the structure which adopt different coordination modes. The ZnIIions are bridged by tmb ligands, leading to one-dimensional helical chains with different handedness, and adjacent helices are linked by bdic2−(A) ligands, forming a two-dimensional network structure. The two-dimensional layers are further connected by bdic2−(B) ligands, resulting in a three-dimensional framework with the topological notation 66. The IR spectra and thermogravimetric curves are consistent with the results of the X-ray crystal structure analysis and the title polymer exhibits good fluorescence in the solid state at room temperature.
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Tan, Lianjiang, Ajun Wan, Tingting Zhao, Ran Huang et Huili Li. « Retraction of “Aqueous Synthesis of Multidentate-Polymer-Capping Ag2Se Quantum Dots with Bright Photoluminescence Tunable in a Second Near-Infrared Biological Window” ». ACS Applied Materials & ; Interfaces 13, no 15 (7 avril 2021) : 18393. http://dx.doi.org/10.1021/acsami.1c05349.

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Smith, Andrew M. « (Keynote) Quantum Dot Coatings for Aqueous Stabilization and Applications in Biomolecular Analysis ». ECS Meeting Abstracts MA2022-02, no 20 (9 octobre 2022) : 909. http://dx.doi.org/10.1149/ma2022-0220909mtgabs.

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Semiconductor quantum dots have been commercially available as molecular probes for applications in the life sciences and clinical diagnostics for two decades, however they have only been adopted in niche applications. Part of the reason for limited adoption is attributable to challenges in colloidal stabilization, as these solid nanocrystals tend to aggregate and nonspecifically adsorb to surfaces and cellular structures. This can largely be alleviated by use of nanocrystal coatings that resist nonspecific binding and promote aqueous dispersion, however the vast majority of such coatings are based on neutral and zwitterionic polymers that add considerable hydrodynamic size to the product. This size increase is due to the bulk of the coating itself as well as adsorption of water molecules and ions in solution. The size increase causes steric hindrance and inaccurate molecular labeling when these probes are used to analyze targets that have considerable size or ones that are located in crowded regions of cells or tissues. Furthermore, the bioaffinity label that attaches the quantum dot to its intended molecular target often contributes substantially to the final size and stability of the probe. This is especially challenging for protein labeling using antibodies, which themselves are fairly large proteins that attach heterogeneously to quantum dots, typically yielding large, polydisperse products. This talk will focus on developments in quantum dot engineering, monolayer polymeric coatings, and bioconjugation strategies to optimize offsetting characteristics of size, homogeneity, bioaffinity, and specificity. In particular, multidentate polymer coatings in recent years have enabled the production of quantum dots with long-term shelf life, small hydrodynamic diameters, and efficient click chemistry conjugations. By tuning the conjugation methods to antibody fragments and single-stranded DNA, we can now prepare bioaffinity labels for proteins and nucleic acids in the ~10 nm range, with further size reductions possible through nanocrystal heterostructure engineering. This talk will also cover how in situ protein and nucleic acid labeling applications can benefit from these advances in addition to current challenges in processing, scale-up, and user adoption.
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Liu, F. L., X. P. Wang et D. Sun. « Crystal structure of a novel cadmium sulfate coordination polymer based on the multidentate 2-(3-(4-(pyridin-4-yl)phenyl)-1H-1,2,4-triazol-5-yl) pyridine ligand ». Journal of Structural Chemistry 55, no 5 (septembre 2014) : 932–36. http://dx.doi.org/10.1134/s0022476614050217.

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Harrowfield, JM, H. Miyamae, BW Skelton, AA Soudi et AH White. « Lewis-Base Adducts of Lead(II) Compounds. VII. Synthetic and Structural Studies of Some 1:1 Adducts of Linear Polyamines With Lead(II) Nitrate ». Australian Journal of Chemistry 49, no 10 (1996) : 1029. http://dx.doi.org/10.1071/ch9961029.

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Syntheses and room-temperature single-crystal X-ray structure determinations are recorded for 1 : 1 adducts of lead(II) nitrate with the linear multidentate polyamines ethane-1,2-diamine ('en'(= '2')), H2N(CH2)2NH(CH2)2NH2(' dien ' = '22') and H2N(CH2)xNH(CH2)yNH(CH2)zNH2 ( xyztet = '222tet' (= ' trien '), '232tet', '323tet'). Crystal/refinement data are as follows: [(en) Pb (NO3)2](∞|∞) is monoclinic, P 21/c, a 5.388(2), b 12.440(5), c 13.123(3) Ǻ, β 102.33(3)°, Z = 4 f.u .; R 0.037 for No 2698 'observed' (I > 3σ(I)) reflections. [( dien ) Pb (NO3)2](∞|∞) is orthorhombic, Ccma , a 9.800(2), b 10.840(2), c 20.521(5), Z = 8; R 0.045, No 991. [( trien ) Pb (NO3)2](∞|∞) is orthorhombic, P 212121, a 14.815(3), b 10.975(3), c 8.410(2) Ǻ, Z = 4; R 0.050, No 1360; [(232tet) Pb (NO3)2](∞|∞) is isomorphous, a 14.524(6), b 11.221(1), c 8.860(2) Ǻ, R 0.036, No 2371. [(323tet) Pb (NO3)2](∞|∞) is monoclinic, P21/c, a 8.195(4), b 14.407(7), c 13.312(4) Ǻ, β 91.05(3)°, Z = 4; R 0.049, No 1644. In general, the degree of complexity of the adduct diminishes as the ligand size increases: whereas the en adduct is a compact one-dimensional two stranded polymer with nearly all nitrate oxygens involved in tight bridging interactions, the extent of bridging diminishes in the adducts of the larger amines, until, for the 323tet species, a monomer is obtained involving a lead coordination sphere containing the ligand and a pair of bidentate nitrate groups. The 1 : 2 adduct with en is also recorded, and is a dimer with quasi-i internal symmetry. [(en)2Pb(NO3)2]2 is monoclinic, P21, a 6.661(2), b 14.226(8), C 13.618(4)Ǻ, β 96.51(2)°; R 0.072, No 1713.
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Wu, Yayun, Duyang Gao, Pengfei Zhang, Chuansheng Li, Qian Wan, Chi Chen, Ping Gong, Guanhui Gao, Zonghai Sheng et Lintao Cai. « Iron oxide nanoparticles protected by NIR-active multidentate-polymers as multifunctional nanoprobes for NIRF/PA/MR trimodal imaging ». Nanoscale 8, no 2 (2016) : 775–79. http://dx.doi.org/10.1039/c5nr06660c.

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Bracco, Silvia, Daniele Piga, Irene Bassanetti, Jacopo Perego, Angiolina Comotti et Piero Sozzani. « Porous 3D polymers for high pressure methane storage and carbon dioxide capture ». Journal of Materials Chemistry A 5, no 21 (2017) : 10328–37. http://dx.doi.org/10.1039/c7ta00934h.

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Xue, Zhen-Zhen, Xin-Yu Li, Lei Xu, Song-De Han, Jie Pan et Guo-Ming Wang. « Novel silver(i) cluster-based coordination polymers as efficient luminescent thermometers ». CrystEngComm 23, no 1 (2021) : 56–63. http://dx.doi.org/10.1039/d0ce01507e.

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Zheng, Teng-Fei, Shu-Li Yao, Chen Cao, Sui-Jun Liu, Hui-Kang Hu, Tao Zhang, Hai-Ping Huang, Jin-Sheng Liao, Jing-Lin Chen et He-Rui Wen. « Large magnetic entropy changes in three GdIIIcoordination polymers containing GdIIIchains ». New Journal of Chemistry 41, no 16 (2017) : 8598–603. http://dx.doi.org/10.1039/c7nj01463e.

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Three chain-based GdIIIcomplexes based on three types of multidentate O ligands have been successfully constructedviahydro/solvothermal reactions. They exhibit good thermal stabilities and large magnetic entropy changes.
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Marshall, Charlotte. « Retraction : Water-soluble multidentate polymers compactly coating Ag2S quantum dots with minimized hydrodynamic size and bright emission tunable from red to second near-infrared region ». Nanoscale 12, no 41 (2020) : 21459. http://dx.doi.org/10.1039/d0nr90232b.

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Retraction of ‘Water-soluble multidentate polymers compactly coating Ag2S quantum dots with minimized hydrodynamic size and bright emission tunable from red to second near-infrared region’ by Rijun Gui et al., Nanoscale, 2014, 6, 5467–5473, DOI: 10.1039/C4NR00282B.
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46

Ma, Zhi Long, Meng Chen Wang, Jian Yun Shi et Li Tian. « Three Mn(ii) metal–organic frameworks with the same chemical composition, but different topological structures and properties ». CrystEngComm 23, no 12 (2021) : 2396–403. http://dx.doi.org/10.1039/d1ce00064k.

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Solvothermal reactions of a novel multidentate ligand, 2,5-bis-(1,2,4-triazol-1-yl)-terephthalic acid (H2TTPA), with MnCl2 afforded three structurally distinct coordination polymers with the same formula, [Mn(TTPA)·H2O]n (Mn-(1–3)).
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Reddy, Pulimamidi Saritha, P. V. Ananthalakshmi et V. Jayatyagaraju. « Synthesis and Structural Studies of First Row Transition Metal Complexes with Tetradentate ONNO Donor Schiff Base Derived from 5-Acetyl 2,4-dihydroxyacetophenone and Ethylenediamine ». E-Journal of Chemistry 8, no 1 (2011) : 415–20. http://dx.doi.org/10.1155/2011/536269.

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Cr(III), Mn(II), Fe(III), Co(II), Ni(II), Cu(II) and Zn(II) complexes were prepared by template reaction of 5-acetyl 2,4-dihydroxyacetophenone (H2-ADA) and ethylenediamine in the presence of metal ions. The complexes have been characterized on the basis of elemental analyses, conductivity, magnetic moments, infrared and electronic spectral data. The Schiff base binds to metal ions in bis-multidentate ONNO mode leading to two dimensional Schiff base polymers. All the complexes have been assigned octahedral stereochemistry.
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Belikov, Кonstantin, Ekateryna Bryleva, Zinaida Bunina, Victoria Varchenko, Anna Andryushchenko, Ilias Shcherbakov, Vitaliy Kalchenko, Andriy Drapailo, Alexander Zontov et Larysa Zontova. « SOLID PHASE EXTRACTANTS BASED ON POROUS POLYMERS IMPREGNATED WITH MULTIDENTATE CHELATING LIGANDS FOR ACTINIDE AND LANTHANIDE REMOVAL ». Science and Innovation 17, no 2 (27 avril 2021) : 64–71. http://dx.doi.org/10.15407/scine17.02.064.

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Introduction. Treatment and disposal of radioactive wastes as well as monitoring of radioactive isotope content in environmental objects are actual tasks in the developed world. Lanthanide and transuranium element removal from spent nuclear fuel of nuclear power plants allows decreasing waste amount to be dumped and diminishing the risk of environmental pollution by radionuclides. Problem Statement. Considering extreme radiotoxicity of transuranium elements and tight standards restricting their activity in air and water, there is an urgent need to develop accurate and highly sensitive methods for pollution control. Purpose. Development of solid phase extractants (SPEs) based on porous polymers impregnated with multidentate chelating ligands for lanthanide, uranium and transuranium element removal from aqueous solutions. Materials and Methods. The materials used are porous divinylbenzene polymers of POROLAS brand and styrene-divinylbenzene copolymers from Smoly SE (Kamianske); multidentate chelating ligands of actinides and lanthanides such as N,N,N´,N´-tetra-n-octyl-oxapentane-1,5-diamide (TODGA) and carbamoyl phosphine oxides (CMPO); sorbent from TrisKem (France) based on TRU Resin (Eichrom Industries, Inc.). The research techniques are inductively coupled plasma atomic emission spectrometry, IR spectroscopy, scanning electron spectroscopy, spectrofluorimetry. Results. The solid-phase extractants (SPEs) for actinide and lanthanide removal from aqueous solutions have been synthesized by impregnation of porous polymeric POROLAS matrices and TODGA, CMPO-(PhOct) and CMPO-(Ph2). Sorption kinetics has been studied and capacity values for the different sorbents have been estimated. Extractive columns for uranium and europium concentration have been manufactured. Conclusions. SPEs studied demonstrate a high efficiency in removing uranium and europium from aqueous solutions. Due to their characteristics obtained materials may be used for preconcentration of target ions in radioecologycal monitoring procedures.
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Charmant, Jonathan P. H., A. H. M. Monowar Jahan, Nicholas C. Norman, A. Guy Orpen et Thomas J. Podesta. « Coordination polymers formed by Bi(SC6F5)3 with multidentate polypyridyl ligands ». CrystEngComm 6, no 7 (2004) : 29. http://dx.doi.org/10.1039/b315176j.

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Wang, Peng-Cheng, Yuan-Gang Xu, Qian Wang, Yan-Li Shao, Qiu-Han Lin et Ming Lu. « Self-assembled energetic coordination polymers based on multidentate pentazole cyclo-N5− ». Science China Materials 62, no 1 (27 avril 2018) : 122–29. http://dx.doi.org/10.1007/s40843-018-9268-0.

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