Готові списки джерел за темами / Pyrazole Based Ligand

Добірка наукової літератури з теми "Pyrazole Based Ligand"

Автор: Grafiati
Опубліковано: 7 вересня 2023

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Статті в журналах з теми "Pyrazole Based Ligand"

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Syahputri, Yulian, Sutanto Sutanto, and Riza Shabrina Zamzani. "Hg (II) and Cd (II) Heavy Metal Ions Detection Based On Fluorescence Using Zn (II) Metal Ion Complex with Pyrazoline Derivatives Ligand." Helium: Journal of Science and Applied Chemistry 2, no. 1 (June 30, 2022): 1–6. http://dx.doi.org/10.33751/helium.v2i1.5407.

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Анотація:
Pyrazoline derivatives can be used as ligands because they have photophysical properties and can chelate metal ions which cause very strong absorption, emission and have a fluorescence properties. Therefore, in recent years, pyrazoline ligands and their derivatives have been widely used for chemosensors. This research aims to detect fluorescence-based heavy metal ions Hg2+ and Cd2+ using a metal ion complex compound Zn2+ with pyrazoline derivative ligand. The research was started by synthesizing pyrazoline-derived ligands, then synthesizing complex compounds. Complex compounds were characterized using Fourier Transform Infra Red (FTIR), UV-Vis Spectrophotometer, and Spectrofluorometer. Then, a fluorescence study was carried out to determine the type of fluorosensor for complex compounds with the addition of heavy metal ions Cd2+ and Hg2+. The last stage is UV-Vis spectroscopy study on the addition of heavy metal ions Hg2+ and Cd2+. Pyrazoline derivative ligand obtained as para-di-2-(1-phenyl-3-pyridyl-4,5-dihydro-1H-pyrazole-5-yl)benzene is a yellow solid. The metal ion complex compound Zn2+ with pyrazolin derivative ligand is a brown colored compound, has a yield of 45 % and a melting point is 245 oC. The FTIR spectrum showed the presence of functional groups such as amine, C-H aromatic, C=N, C=C aromatic, C-N, Zn-N and Zn-Cl. Analysis with UV-Vis spectrophotometer showed that there was a shift in the maximum wavelength from the ligand to the Zn(II)-ligand complex, namely 240 nm to 246 nm and 363 nm with molar absorptivity values (log ) of 4.56 and 4.28, respectively. For fluorescence analysis, two absorbance peaks were obtained, namely at a wavelength of 370 nm with an intensity of 3644 a.u and 478 m at 8216 a.u. The results of fluorescence chemosensor studies on the addition of heavy metal ions Hg2+ and Cd2+ showed that the metal ion complex compound Zn2+ with pyrazoline-derived ligands can detect heavy metal ions Hg2+ and Cd2+ with a turn-on type.
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Hajra, Tanima, Jitendra K. Bera, and Vadapalli Chandrasekhar. "Cyclometalated Ir(III) Complexes Containing Pyrazole/Pyrazine Carboxylate Ligands." Australian Journal of Chemistry 64, no. 5 (2011): 561. http://dx.doi.org/10.1071/ch11049.

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Two cyclometalated Ir(iii) complexes using 2-phenylpyridine (ppy-H) as the cyclometalating ligand, and pyrazole-3-carboxylic acid (prca-H) and pyrazine 3,5-dicarboxylic acid (pzdca-H2) as ancillary ligands; were synthesized from the chloro-bridged dimer precursor [{(ppy)2Ir}2(μ-Cl)2]. The title compounds [Ir(ppy)2(prca)] (1) and [{Ir(ppy)2}2(pzdca)] (2) are monomeric and dimeric neutral Ir(iii) complexes, respectively. Their electrochemical and photophysical properties were examined. They exhibit metal-based oxidations and ligand-based reductions. These complexes exhibit emission in the blue-green region with lifetimes in the micro-second range at room temperature. The nature of the emission spectra indicates differences in the origin of emission in these two compounds.
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Guerrero, Miguel, Lourdes Rivas, Teresa Calvet, Mercè Font-Bardia, and Josefina Pons. "ZnII Complexes Based on Hybrid N-Pyrazole, N′-imine Ligands: Synthesis, X-Ray Crystal Structure, NMR Characterisation, and 3D Supramolecular Properties." Australian Journal of Chemistry 68, no. 5 (2015): 749. http://dx.doi.org/10.1071/ch14344.

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The present report is on the synthesis of two new 3-imine-3,5-dimethylpyrazole ligands, N-[3-(3,5-dimethyl-1H-pyrazol-1-yl)propylidene]ethylamine (L1) and N-[3-(3,5-dimethyl-1H-pyrazol-1-yl)propylidene]propylamine (L2). These ligands form molecular complexes with the formula [ZnCl2(L)] (L = L1 (1) and L2 (2)) when the reacting with ZnCl2 in a metal (M)/ligand (L) ratio of 1 : 1. These new ZnII complexes have been characterised by elemental analyses, conductivity measurements, mass spectrometry, and infrared, 1H and 13C{1H} NMR spectroscopy techniques. The two crystalline structures of complexes 1 and 2 have been solved by X-ray diffraction methods. Finally, we have studied the self-assembly three-dimensional supramolecular structure through different intra- and intermolecular contacts. The application of these ZnII complexes in supramolecular crystal engineering is interesting due to (1) the easy preparation and the high efficiency of this system and (2) the different bonding properties of the heteroatoms (N-pyrazole vs N-imine) present in the structure of the ligands.
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Altmann, Philipp J., Christian Jandl, and Alexander Pöthig. "Introducing a pyrazole/imidazole based hybrid cyclophane: a hydrogen bond sensor and binucleating ligand precursor." Dalton Transactions 44, no. 25 (2015): 11278–81. http://dx.doi.org/10.1039/c5dt01775k.

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Titi, Abderrahim, Kaoutar Zaidi, Abdullah Y. A. Alzahrani, Mohamed El Kodadi, El Bekkaye Yousfi, Anna Moliterni, Belkheir Hammouti, Rachid Touzani, and Mohamed Abboud. "New In Situ Catalysts Based on Nitro Functional Pyrazole Derivatives and Copper (II) Salts for Promoting Oxidation of Catechol to o-Quinone." Catalysts 13, no. 1 (January 10, 2023): 162. http://dx.doi.org/10.3390/catal13010162.

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Herein, new substituted ligands based on pyrazole (L1–L4) were synthesized via a one-step by condensing (1H-pyrazole-1-yl) methanol with different primary amine compounds. The present work utilized the catalytic properties of the in situ complexes formed by these ligands with various copper (II) salts viz. Cu(CH3COO)2, CuSO4, CuCl2, and Cu(NO3)2 for the oxidation of catechol to o-quinone. The studies showed that the catalytic activities depend on the nature and concentration of the ligand, the nature of the counterion, and the solvent. It was observed that the complex formed by L2 and Cu(CH3COO)2 exhibited good catalytic activity in methanol with Vmax of 41.67 µmol L−1 min−1 and Km of 0.02 mol L−1.
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Yousri, Amal, Ayman El-Faham, Matti Haukka, Mohammed Salah Ayoup, Magda M. F. Ismail, Nagwan G. El Menofy, Saied M. Soliman, Lars Öhrström, Assem Barakat, and Morsy A. M. Abu-Youssef. "A Novel Na(I) Coordination Complex with s-Triazine Pincer Ligand: Synthesis, X-ray Structure, Hirshfeld Analysis, and Antimicrobial Activity." Crystals 13, no. 6 (May 29, 2023): 890. http://dx.doi.org/10.3390/cryst13060890.

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The pincer ligand 2,4-bis(3,5-dimethyl-1H-pyrazol-1-yl)-6-methoxy-1,3,5-triazine (bpmt) was used to synthesize the novel [Na(bpmt)2][AuCl4] complex through the self-assembly method. In this complex, the Na(I) ion is hexa-coordinated with two tridentate N-pincer ligands (bpmt). The two bpmt ligand units are meridionally coordinated to Na(I) via one short Na-N(s-triazine) and two slightly longer Na-N(pyrazole) bonds, resulting in a distorted octahedral geometry around the Na(I) ion. In the coordinated bpmt ligand, the s-triazine core is not found to be coplanar with the two pyrazole moieties. Additionally, the two bpmt units are strongly twisted from one another by 64.94°. Based on Hirshfeld investigations, the H···H (53.4%) interactions have a significant role in controlling the supramolecular arrangement of the [Na(bpmt)2][AuCl4] complex. In addition, the Cl···H (12.2%), C···H (11.5%), N···H (9.3%), and O···H (4.9%) interactions are significant. Antimicrobial investigations revealed that the [Na(bpmt)2][AuCl4] complex has promising antibacterial and antifungal activities. The [Na(bpmt)2][AuCl4] complex showed enhanced antibacterial activity for the majority of the studied gram-positive and gram-negative bacteria compared to the free bpmt (MIC = 62.5–125 µg/mL vs. MIC = 62.5–500 µg/mL, respectively) and Amoxicillin (MIC > 500 µg/mL) as a positive control. Additionally, the [Na(bpmt)2][AuCl4] complex had better antifungal efficacy (MIC = 125 µg/mL) against C. albicans compared to bpmt (MIC = 500 µg/mL).
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Singh, Avineesh, and Harish Rajak. "STRUCTURAL EXPLORATION AND PHARMACOPHORIC INVESTIGATION OF PYRAZOLE BASED ANALOGS AS NOVEL HISTONE DEACETYLASE 1 INHIBITOR USING COMBINATORIAL STUDIES." International Journal of Pharmacy and Pharmaceutical Sciences 10, no. 3 (March 1, 2018): 90. http://dx.doi.org/10.22159/ijpps.2018v10i3.22735.

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Objective: Histone deacetylase inhibitors (HDACi) have four essential pharmacophores as cap group, connecting unit, a linker moiety and zinc binding group for their anticancer and histone deacetylase (HDAC) inhibition activity. On the basis of this fact, the objective of this research was to evaluate the exact role of pyrazole nucleus as connecting unit and its role in the development of newer HDACi.Methods: Ligand and structure-based computer-aided drug design strategies such as pharmacophore and atom based 3D QSAR modelling, molecular docking and energetic based pharmacophore mapping have been frequently applied to design newer analogs in a precise manner. Herein, we have applied these combinatorial approaches to develop the structure-activity correlation among novel pyrazole-based derivatives.Results: the Pharmacophore-based 3D-QSAR model was developed employing Phase module and e-pharmacophore on compound 1. This 3D-QSAR model provides fruitful information regarding favourable and unfavourable substitution on pyrazole-based analogs for HDAC1 inhibition activity. Molecular docking studies indicated that all the pyrazole derivatives bind with HDAC1 proteins and showed critical hydrophobic interaction with 5ICN and 4BKX HDAC1 proteins.Conclusion: The outcome of the present research work clearly indicated that pyrazole nucleus added an essential hydrophobic feature in cap group and could be employed to design the ligand molecules more accurately.
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Lancheros, Andrés, Subhadip Goswami, Mohammad Rasel Mian, Xuan Zhang, Ximena Zarate, Eduardo Schott, Omar K. Farha, and Joseph T. Hupp. "Modulation of CO2 adsorption in novel pillar-layered MOFs based on carboxylate–pyrazole flexible linker." Dalton Transactions 50, no. 8 (2021): 2880–90. http://dx.doi.org/10.1039/d0dt03166f.

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Lin, Chen-Lan, Yan-Fei Chen, Li-Juan Qiu, Binglong Zhu, Xin Wang, Shi-Peng Luo, Wenyan Shi, Ting-Hai Yang, and Wu Lei. "Synthesis, structure and photocatalytic properties of coordination polymers based on pyrazole carboxylic acid ligands." CrystEngComm 22, no. 41 (2020): 6847–55. http://dx.doi.org/10.1039/d0ce01054e.

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BAI, FU-QUAN, TAO LIU, XIN ZHOU, JIAN-PO ZHANG, and HONG-XING ZHANG. "THEORETICAL COMPUTATIONAL STUDIES ON ELECTRONIC STRUCTURES, SPECTROSCOPIC PROPERTIES AND NITROGEN HETEROATOM EFFECT OF A SPECIES OF ASYMMETRICAL DIIMINE LIGAND PLATINUM(II) COMPLEXES." Journal of Theoretical and Computational Chemistry 08, no. 04 (August 2009): 603–13. http://dx.doi.org/10.1142/s0219633609004952.

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Анотація:
Electronic structures and spectroscopic properties of a series of platinum(II) complexes based on the C-linked asymmetrical diimine ligand (2-pyridyl-pyrazole (1), 2-pyridyl-1,2,4-triazole (2), 2-pyridyl-tetrazole (3), 2-pyrazine-pyrazole (4) have been studied by the time-dependent density functional theory calculations with polarizable continuum model. The ground- and excited-state structures were optimized by the density functional theory and single-excitation configuration interaction methods, respectively. The calculated structures and spectroscopic properties are in agreement with the corresponding experimental data. The results of the spectroscopic investigations revealed that the lowest-energy absorptions have1,3metal-to-ligand charge transfer (MLCT)/1,3single ligand centered charge transfer (ILCT) mixing characters. The highest-occupied molecular orbitals (HOMOs) of 1–4 are composed of Pt ( d yz) and azole, while the lowest-unoccupied molecular orbitals (LUMOs) are mainly localized upon the pyridyl-azolate ligand (70% on the pyridine segment). From 1 to 3, the molecular orbital (MO) energies of HOMO and LUMO are decreased and the HOMO energies are changed more remarkably. This is caused by that the conjugation of the azolate segment of the ligand are enhanced through introducing more N heteroatoms into this segment. As a result of MO energy change, the lowest-energy absorptions are blue-shifted in the order 1 < 2 < 3. With the replacement of pyridyl by pyrazine, the HOMO energy of 4 is comparable to 1, but the LUMO energy is decreased by 0.8 eV, and the lowest-energy absorptions are red-shifted to 2.36 eV. Otherwise, the phosphorescent emissions of these complexes have the 3MLCT/3ILCT characters, and should originate from the lowest-energy absorptions. The emissions of 1–4 are red-shifted in the order 3 < 2 < 1 < 4. The heteroatom effect is suitable for tuning the spectra of this kind of materials.
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Більше джерел

Дисертації з теми "Pyrazole Based Ligand"

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Ainooson, Michael Kojo. "Binuclear late transition metal complexes with pyrazole based compartmental ligands: Scaffolds for cooperative organometallic transformations." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2014. http://hdl.handle.net/11858/00-1735-0000-0023-98FC-E.

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2

Olson, Michael David. "Pyrazolyl based ligands in transition metal complexes." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/27610.

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Анотація:
Several uninegative/ multidentate pyrazolyl based ligands were synthesized [eg. HBPZ₃₋, HBpz”₃₋, MeGapz₃₋/ MeGapz” ₃₋, H2BpZ₂₋/ Me2Bpz₂₋/ Me2GapZ₂₋/ Me2Gapz"₂₋/ Me₂Gapz(OCH₂CH₂NH₂)⁻Me₂Gapz(OCH₂CH₂CH=CH₂)⁻ ; pz pyrazolyl/ pz" = 3, 5 dimethylpyrazolyl]. These ligands were reacted with the sterically hindered metal complex, HBpz*₃MCl (M = Co, Ni; pz* = 3-iPr-4-Br-pyrazolyl) and the mixed-ligand transition metal complexes of general formulae, HBpz*₃ML, were isolated. The X-ray crystal structure of one such complex, HBpz*₃Nipz"₃BH was determined showing a near octahedral arrangement of ligands about the nickel centre. The electronic spectra of the nickel complexes were recorded and compared to predicted transitions. The electronic spectra of the four coordinate nickel complex, HBpz*₃NiCl, fit a d⁸, tetrahedral, ligand field model. The six coordinate complexes, HBpz*₃NiL (L = HBPZ₃, HBpz"₃, MeGapz₃, MeGapz”₃), fit a d⁸, octahedral, ligand field model. The unsymmetrical pyrazolylgallate ligands were reacted with the rhodium dimer [Rh(CO)₂CI]₂ to give the square planar complexes, LRh(CO) [L = Me2Gapz(OCH₂CH₂NH₂), Me₂Gapz(OCH₂CH₂CH=CH₂)]. These rhodium[I] complexes appeared to undergo oxidative additions of Mel, allylbromide and I₂. Furthermore these rhodium[I] complexes appeared to bind the small gas molecules, CO and ethene. A number of heterobimetallic complexes, with direct metal-metal bonds, were prepared and isolated from the reaction of the molybdenum anion, HBpz"₃(CO)₃MO⁻ with the transition metal halides, [CuPPb₃Cl]₄, SnR₃Cl (R = Me, Ph) and GePh₃Cl.
Science, Faculty of
Chemistry, Department of
Graduate
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3

Movahed, Hazel Haghighi. "Coordination chemistry and crystal engineering with new polydentate pyrazole-based ligands." Thesis, University of Sheffield, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.522425.

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4

ORBISAGLIA, SERENA. "From pyrazole- to imidazole-based N-donor Ligands: Coordination Chemistry and Applications of New Late Transition Metals Complexes with Scorpionates, Poly(pyrazolyl)alkanes and NHCs." Doctoral thesis, Università degli Studi di Camerino, 2014. http://hdl.handle.net/11581/401839.

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The nature of ligands coordinated to the metal ion mostly determines the properties of the inorganic, organometallic or bioinorganic model compounds. The pyrazole is one of the most studied heterocyclic aromatic compounds in coordination chemistry as single ligand or incorporated in polidentate ligands, such as in poly(pyrazolyl)borates (‘scorpionates'), poly(pyrazolyl)alkanes, etc. The great versatility of the pyrazole allows the formation of several ligands with different functionalizations, which mainly influence the geometry and nuclearity of the diverse coordination complexes afforded by the reaction of the pyrazole-based chelating ligands and a metal ion. Another of the most studied heterocyclic aromatic compounds in coordination chemistry is an analogue of pyrazole with two non-adjacent nitrogen atoms, the imidazole, which represents the main structure of the most common and studied N-Heterocyclic carbenes (NHCs), in particular the imidazol‐2‐ylidenes. These general informations arouse curiosity in main features and reactivity, synthesis and coordination modes, potential and ensured applications of various N-donor ligands, such as poly(pyrazolyl)borates or scorpionates, their isoelectronic and isosteric neutral analogues poly(pyrazolyl)alkanes and N-heterocyclic carbenes, presented, thus, in detail, in Chapter 1. The focus on the electronic and steric properties, the coordinating behaviour and several applications of scorpionates metal complexes, the state-of-art on coordination chemistry and reactivity of the poly(pyrazolyl)alkanes derivatives, the advantages of NHCs over phosphines, including ease of handling, minimal toxicity and powerful electron-donating properties, as enhanced stability of their transition metal complexes, which lead to the synthesis of highly active derivatives in homogeneous catalysis, anticipate the research work of this thesis on the nitrogen pyrazole- and imidazole-based ligands and their organometallic compounds. Beginning from Chapter 2, which describes the aims of the research work, all the chapters are divided in four sub-chapters. In the first sub-chapter differently halogen substituted bis- and tris-(pyrazolyl)borate ligands (BpBr3, TpBr3 and TpiPr,4Br) are compared in terms of electron-donor character through their interactions with various ruthenium(II) arene dimers, as also through electrochemical studies. Interestingly, an unexpected dinuclear ionic compound accounted for by its low thermodynamic stability, confirmed by theoretical calculations at the DFT level, due to steric reasons. The second sub-chapter is centered on the synthesis, characterization and crystal structure of the complexes of the second-lowest steric hindrance scorpionate ligand, TpTn, towards CuI, CuII, ZnII and CdII acceptors. A remarkable coordinative aspect of this ligand is pointed out, as well as the thermal and air stability of the relative complexes, confirmed by thermogravimetric and differential thermal analysis (TGA-DTA). By contrast, the interaction between TpTn and PtI2 proceeded through ligand decomposition, affording a monomeric complex. In the third sub-chapter, the varying, different stoichiometries and the N,N-chelating coordination modes of the bis(pyrazolyl)methanes, in particular of the two indazolyl-based regio-isomeric ligands, L1, bis(1H-indazol-1-yl)methane, and L2, bis(2H-indazol-2-yl)methane, toward XI group metal centers are studied. The synthesis and full characterization of analogous adducts of both regio-isomers allow a systematic comparison of their structural and spectral features, depending on the regio-isomeric ligand and counter-ion used, and the reaction conditions employed. The synthesis and characterization of a new series of stable, cationic gold(I/III) NHC complexes, as well as their catalytic activity in five well-established organic gold-mediated transformations, performed at the University of Strasbourg, under guidance of Director of Research Pierre Braunstein and coworkers (Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Universita'© de Strasbourg, France) is described in the fourth sub-chapter. Interestingly, various attempts to synthesize gold(III) NHC bis- or tris-pyridine complexes, as also the comparative behaviour of NHCs respect to phosphine ligands, are presented. Going further on the thesis structure, all the general procedures and experimental data are reported in Chapter 3, while the discussion and elaboration of the results are described in Chapter 4. Concluding remarks and future perspectives are discussed in Chapter 5, whereas all the references and some notes are given in Chapter 6. In Annexes section, the Curriculum Vitae, the List of Pubblications and the Contributions to Congresses are presented.
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Perlepe, Panagiota. "Magnetic and Electrically Conductive Two-Dimensional Coordination Networks Based on the Redox-Active Pyrazine Ligand." Thesis, Bordeaux, 2019. http://www.theses.fr/2019BORD0227.

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Cette thèse est consacrée à la synthèse et à la caractérisation physique de nouveaux polymères de coordination bidimensionnels (2D) possédant un ordre magnétique et/ou une conductivité électrique à haute température. La présence simultanée de ces deux propriétés au sein d'un même matériau représente un formidable défi pour la synthèse de matériaux multifonctionnels utilisables dans le traitement et le stockage des données de nouvelles générations. Notre approche pour synthétiser de tels systèmes implique l'utilisation du ligand pontant organique redox-actif pyrazine, et de métaux de transition réducteurs. Le chapitre I présente quelques aspects généraux sur la chimie redox, la délocalisation des charges et la valence mixte qui sont essentiels à la compréhension des résultats expérimentaux. Les différentes approches de synthèse de polymères de coordination conducteurs et magnétiques sont également décrites. Le chapitre II donne un aperçu général des concepts fondamentaux concernant la conductivité électrique, le magnétisme et la spectroscopie d'absorption des rayons X. Le chapitre III analyse la synthèse et la caractérisation physique du composé CrCl2(pyrazine)2 présentant à la fois un ordre magnétique et une conductivité électrique. Les chapitres IV et V sont consacrés à l'étude de nouveaux composés MX2(pyrazine)2 en faisant varier M (Ti, V) et X (OSO2CH3, Br et I). L’objectif est de déterminer l’effet de la nature du centre métallique et du ligand axial sur les propriétés magnétiques et électriques. Enfin, le chapitre VI illustre comment la chimie redox post-synthétique peut entraîner une augmentation impressionnante de la température de l'ordre magnétique dans les matériaux 2D à base de pyrazine
This thesis is devoted to the synthesis and physical characterization of new two-dimensional (2D) coordination polymers that present high-temperature magnetic order and/or electrical conductivity. The simultaneous implementation of these two properties within a single material represents a formidable challenge in the synthesis of multifunctional materials for next-generation data processing and storage. Our approach to synthesize such systems involves the use of the redox-active organic bridging ligand, pyrazine, and reducing transition metals. Chapter I presents some general aspects of redox-activity, charge delocalization and mixed-valency that are crucial for the understanding of the experimental results. The different approaches for the synthesis of conducting and magnetic coordination polymers are also described. Chapter II provides a general view on the fundamental concepts regarding electrical conductivity, magnetism and X-ray absorption spectroscopy. Chapter III deals with the synthesis and extensive physical characterization of the coordination solid CrCl2(pyrazine)2, which exhibits both magnetic order and electrical conductivity. Chapters IV and V are devoted to the study of the effect of the anionic co-ligands and metal centers, respectively, in the family of MX2(pyrazine)2 (M = Cr, Ti, V and X = OSO2CH3, Br and I) coordination solids. Finally, Chapter VI illustrates how post-synthetic redox chemistry can result in an impressive enhancement of the magnetic order temperature in 2D layered pyrazine-based materials
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Paul, Tobias [Verfasser], and Nicolai [Akademischer Betreuer] Burzlaff. "Ligands and Coordination Chemistry Based on Vinyl and Alkynyl Substituted Pyrazoles / Tobias Paul. Gutachter: Nicolai Burzlaff." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2015. http://d-nb.info/1076120520/34.

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7

Feng, Min. "Multiple physical properties in the lanthanide complexes involving 2,6-di(pyrazol-1-yl)- pyridine-based tetrathiafulvalene ligands." Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1S113.

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Анотація:
Dans ce manuscrit, le premier chapitre introduit la cible matériaux multifonctionnels, y compris les connaissances nécessaires sur les différentes propriétés physiques sélectionnées telles que le magnétisme, la luminescence, et la conductivité, ainsi des contributions précédents de nos et d'autres groupes.Dans le chapitre deux, le ligand à base de tétrathiafulvalène avec deux accepteurs dpp (L1 et L2) (TTF = tétrathiafulvalène, dpp = 2,6-di(pyrazol-1-yl)pyridine) et des complexes lanthanide correspondant sont présentés, y compris la synthèse et les caractérisations physiques: structures cristallographique, voltamétrie cyclique, le spectre d'absorption rationalisée par des calculs TD-DFT, des spectres d'émission, et les mesures d’ aimantation AC et DC. Les complexes Eu, Yb, et Er sont emissives.Dans le chapitre trois, un ligand à base de TTF avec deux sites de coordination hétéro L7 et ses deux Dy(III) complexes (C7-1 et C7-2) ont été présentés avec les caractérisations physiques similaires. Les deux complexes Dy révèlent un caractère de molécule aimant
In this manuscript, the Chapter one introduces the target multifunctional materials, including the necessary knowledge of different selected physical properties such as magnetism, luminescence, and conductivity, as well as some of the previous contributions by our and other groups. In Chapter two, the tetrathiafulvalene-based ligand with two dpp acceptors (L1 and L2) (TTF = tetrathiafulvalene, dpp = 2,6-di(pyrazol-1-yl)-pyridine) and the corresponding lanthanide complexes are presented including the synthesis and physical characterizations: single crystal structure, cyclic voltammetry, absorption spectra that rationalized by TD-DFT calculations, emission spectra, and DC and AC magnetic measurements. The complexes Eu, Yb, and Er are emissive. In the Chapter three, a TTF-based ligand with two hetero coordinating sites L7 and its two Dy(III) complexes (C7-1 and C7-2) were presented, which show multi-relaxation SMM behavior
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Solanki, Nayan Kumar. "The copper chemistry of substituted 2,6-Bis pyrazolyl pyridines and schiff base ligands." Thesis, University of Cambridge, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.621813.

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Roberts, Thomas David. "Novel ligands based on 2,6-di(1H-pyrazol-5-yl)pyridine derivatives and applications in spin crossover and transfer hydrogenation complexes." Thesis, University of Leeds, 2015. http://etheses.whiterose.ac.uk/9418/.

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Анотація:
This thesis is an account of the synthesis of novel iron(II) and ruthenium(II) complexes using 2,6-di(1H-pyrazol-3-yl)pyridine based ligands and their efficacy as spin crossover complexes and transfer hydrogenation catalysts respectively. Chapter 1 is an introduction to the spin crossover and transfer hydrogenation detailing significant literature examples, important influencing factors and applications. Chapter 2 details the synthetic pathways towards all novel ligands used in this work, including numerous attempted pathways and problems which were overcome. Chapter 3 describes the properties of a number of iron(II) complexes made using 2,6-di(alkylpyrazol-3-yl)pyridine ligands. It is shown here that subtle steric and electronic factors about the iron(II) coordination sphere hinder spin crossover. Chapter 4 is a comparison of spin crossover properties of iron(II) complexes containing 2,6-di(1H-pyrazol-3-yl)pyridine ligands bearing a number of different substituents on different positions. The spin crossover behaviour of these complexes is rationalised based on crystal structures, powder x-ray diffraction and magnetic susceptibility measurements. Chapter 5 is an explanation of the differing magnetic susceptibilities of a number of solid solutions of the complex [FeL2]X2 (L = 2,6-di(1H-5-methylpyrazol-3-yl)pyridine). Chapter 6 shows the effectiveness of a number of ruthenium(II) pincer type complexes as catalysts for the transfer hydrogenation of acetophenone derivatives. Chapter 7 is an account of all the synthetic procedures used in this work and includes the full analysis of all novel compounds synthesised.
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Ainooson, Michael Kojo [Verfasser], Franc [Akademischer Betreuer] Meyer, Philipp [Akademischer Betreuer] Vana, and Dietmar [Akademischer Betreuer] Stalke. "Binuclear late transition metal complexes with pyrazole based compartmental ligands: Scaffolds for cooperative organometallic transformations / Michael Kojo Ainooson. Gutachter: Philipp Vana ; Dietmar Stalke. Betreuer: Franc Meyer." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2014. http://d-nb.info/1074758447/34.

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Частини книг з теми "Pyrazole Based Ligand"

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of binuclear manganese(III) complex with unsymmetrical pyrazolate based compartmental ligand." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 6, 220–22. Berlin, Heidelberg: Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-662-65056-1_80.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of binuclear manganese(III) complex with unsymmetrical pyrazolate based compartmental ligand." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 6, 223–25. Berlin, Heidelberg: Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-662-65056-1_81.

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Pettinari, Claudio, Riccardo Pettinari, Corrado Di Nicola, and Fabio Marchetti. "Half-Sandwich Rhodium(III), Iridium(III), and Ruthenium(II) Complexes with Ancillary Pyrazole-Based Ligands." In Advances in Organometallic Chemistry and Catalysis, 269–84. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118742952.ch21.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of iron(II) complex with bis(pyrazolyl)pyridine based ligand (tetraphenylborate salt)." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 7, 290–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-65895-6_110.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of iron(II) complex with bis(pyrazolyl)pyridine based ligand (perchlorate salt)." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 7, 287–89. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-65895-6_109.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of copper(II) complex with heterocyclic Schiff-base ligand derived from pyrazolone and thiosemicarbazide." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 8, 1057–59. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-66460-5_387.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of copper(II) complex with heterocyclic Schiff-base ligand derived from pyrazolone and thiosemicarbazide." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 8, 1063–65. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-66460-5_389.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of copper(II) complex with heterocyclic Schiff-base ligand derived from pyrazolone and semicarbazide." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 8, 1060–62. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-66460-5_388.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of copper(II) complex with heterocyclic Schiff-base ligand derived from pyrazolone and semicarbazide." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 8, 1054–56. Berlin, Heidelberg: Springer Berlin Heidelberg, 2023. http://dx.doi.org/10.1007/978-3-662-66460-5_386.

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Тези доповідей конференцій з теми "Pyrazole Based Ligand"

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Marra, Roberta K. F., Alice M. R. Bernardino, Marcos C. de Souza, Gilberto A. Romeiro, María J. Iglesias, and Fernando López-Ortiz. "Synthesis of new hemilabile ligands based on phosphinic amide and pyrazolo[1,5-c]quanazoline moieties Applications in coordination chemistry." In 15th Brazilian Meeting on Organic Synthesis. São Paulo: Editora Edgard Blücher, 2013. http://dx.doi.org/10.5151/chempro-15bmos-bmos2013_201381913053.

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