Bibliographies thématiques / Polyiodides

Littérature scientifique sur le sujet « Polyiodides »

Auteur : Grafiati
Publié le 10 mars 2023

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Articles de revues sur le sujet "Polyiodides"

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Kornilov, A. D., M. S. Grigoriev et E. V. Savinkina. « Comparison of the rare earth complexes iodides and polyiodides with biuret ». Fine Chemical Technologies 17, no 2 (1 juin 2022) : 172–81. http://dx.doi.org/10.32362/2410-6593-2022-17-2-172-181.

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Objectives. Currently, several hundred polyiodide compounds have been synthesized and structurally characterized, but so far, no formation patterns for certain polyiodide ions have been revealed. The purpose of this work is to continue the search for formation regularities of polyiodides, including polyiodides of lanthanide complexes.Methods. Iodide and polyiodide of samarium complexes with biuret (BU), [Sm(BU)4]I3·BU·2H2O and [Sm(BU)4][I5][I]2, were first synthesized and characterized by X-ray diffraction analysis and infrared spectroscopy, respectively.Results. The obtained compounds complement the row of isostructural lanthanide (La–Gd) complexes. Structures of corresponding iodides and polyiodides were compared in detail. Both types of the compounds contain complex cations of the same composition; however, their structures differ significantly. The central atom coordination polyhedron can be described as a distorted square antiprism and a distorted dodecahedron, respectively. Even greater differences are observed in the outer sphere of complex compounds. The iodide compound crystals contain uncoordinated iodide ions, a biuret molecule and two water molecules. In the polyiodide compound, cations together with isolated I– ions form a three-dimensional framework with the channels, in which linear I5– ions are united in infinite linear chains by weak interactions.Conclusions. The replacement of an iodide ion with a polyiodide ion in complex compounds of lanthanides with BU leads to changes in both the inner sphere and the outer sphere of the cation complex, including the supramolecular level. The presence of iodine atom infinite linear chains in polyiodides allows expecting the presence of anisotropic electrical conductivity along this direction.
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Deplano, Paola, Francesco A. Devillanova, John R. Ferraro, Francesco Isaia, Vito Lippolis et Maria Laura Mercuri. « On the Use of Raman Spectroscopy in the Characterization of Iodine in Charge-Transfer Complexes ». Applied Spectroscopy 46, no 11 (novembre 1992) : 1625–29. http://dx.doi.org/10.1366/0003702924926880.

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FT-Raman spectra of some polyiodides and of a series of D · I2 charge-transfer complexes (where D is a molecule containing the thione or selone groups as donors), all characterized by x-ray diffraction, are reported. For the adducts with the thione compounds, which can be considered weak or medium-weak complexes, an empirical linear correlation between the frequency of the v(I-I) stretching vibrations and the d(I-I) bond distances has been found. Some polyiodides show FT-Raman spectra that are indistinguishable with respect to those displayed by the neutral complexes of weak or medium-weak strength; in such cases, the polyiodide can be regarded as a diiodine molecule, perturbed by an I n ( n = 1,3,…) donor. Polyiodides of this type show Raman absorptions falling in the linear correlation.
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Yushina, Irina D., Boris A. Kolesov et Ekaterina V. Bartashevich. « Raman spectroscopy study of new thia- and oxazinoquinolinium triodides ». New Journal of Chemistry 39, no 8 (2015) : 6163–70. http://dx.doi.org/10.1039/c5nj00497g.

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New polyiodides of thia- and oxa-zinoquinolinium derivatives were characterized using Raman spectroscopy and periodic 3D calculations of the Raman intensities. Polarized Raman spectra of the oriented crystals revealed the features of spatial organization in the polyiodide-anion chains.
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Savastano, Matteo, Valeria Monini, Carla Bazzicalupi et Antonio Bianchi. « Bidimensional Polyiodide Netting Stabilized by a Cu(II) Macrocyclic Complex ». Inorganics 10, no 1 (13 janvier 2022) : 12. http://dx.doi.org/10.3390/inorganics10010012.

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Iodine-dense polyiodide phases are interesting materials for a number of potential uses, including batteries and solid-state conductors. The incorporation of transition metal cations is considered a promising way to enhance the stability, tune the properties, and influence the architecture of polyiodides. However, several interesting metals, including Cu(II), may suffer redox processes, which generally make them not compatible with the I2/I− redox couple. Herein L, a simple derivative of cyclen, is proposed as a Cu(II) ligand capable of protecting the +2 oxidation state of the metal even in the presence of polyiodides. With a step by step approach, we report the crystal structure of free L; then we present spectrophotometric verification of Cu(II) complex stability, stoichiometry, and formation kinetic in DMF solution, together with Cu(II) binding mode elucidation via XRD analysis of [Cu(L)Cl]ClO4∙CH3CN crystals; afterwards, the stability of the CuL complex in the presence of I− is demonstrated in DMF solution, where the formation of a Cu:L:I− ternary complex, rather than reduction to Cu(I), is observed; lastly, polyiodide crystals are prepared, affording the [Cu(L)I]2I3I5 crystal structure. This layered structure is highly peculiar due to its chiral arrangement, opening further perspective for the crystal engineering of polyiodide phases.
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Poreba, Tomasz, Gaston Garbarino, Davide Comboni et Mohamed Mezouar. « Deformation of polyiodides in Cs2I8 crystals at high pressure ». Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 77, no 6 (18 novembre 2021) : 934–39. http://dx.doi.org/10.1107/s2052520621010192.

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Dicaesium octaiodide is composed of layers of zigzag polyiodide units (I8 2−) intercalated with caesium cations. Each I8 2− unit is built of two triiodides bridged with one diiodine molecules. This system was subjected to compression up to 5.9 GPa under hydrostatic conditions. Pressure alters the supramolecular architecture around I8 2−, leading to bending of the triiodide units away from their energetically preferred geometry (D ∞h). Short I2...I3 − contacts compress significantly, reaching lengths typical for the covalently bonded polyiodides. Unlike in reported structures at ambient conditions, pressure-induced catenation proceeds without symmetrization of the polyiodides, pointing to a different electron-transfer mechanism. The structure is shown to be half as compressible [B0 = 12.9 (4) GPa] than the similar CsI3 structure. The high bulk modulus is associated with higher I—I connectivity and a more compact cationic net, than in CsI3. The small discontinuity in the compressibility trend around 3 GPa suggests formation of more covalent I—I bonds. The potential sources of this discontinuity and its implication on the electronic properties of Cs2I8 are discussed.
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Neuse, Eberhard W., et Mohamed S. Loonat. « Ferricenium polyiodides ». Journal of Organometallic Chemistry 286, no 3 (mai 1985) : 329–41. http://dx.doi.org/10.1016/0022-328x(85)80049-8.

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Bailey, R. D., et W. T. Pennington. « Tetramethylpyrazinium polyiodides ». Acta Crystallographica Section B Structural Science 51, no 5 (1 octobre 1995) : 810–15. http://dx.doi.org/10.1107/s0108768194011778.

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Tebbe, K. F., et R. Buchem. « Novel ferricenium polyiodides ». Acta Crystallographica Section A Foundations of Crystallography 52, a1 (8 août 1996) : C332. http://dx.doi.org/10.1107/s0108767396086230.

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Savastano, Matteo, Carla Bazzicalupi, Cristina Gellini et Antonio Bianchi. « Genesis of Complex Polyiodide Networks : Insights on the Blue Box/I−/I2 Ternary System ». Crystals 10, no 5 (9 mai 2020) : 387. http://dx.doi.org/10.3390/cryst10050387.

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The Stoddart’s blue box (BB) (cyclobis(paraquat-p-phenylene))/iodide binary system was recently demonstrated to give rise to porous three-dimensional networks which can hardly be classified as common XOF-type materials (X = M, C, S, i.e., metal, covalent, or supramolecular organic frameworks), leading to the definition of permutable organized frameworks (POFs). The ternary BB/iodide/iodine system was reported to generate pentaiodide-based structures constituted by the most complex interlocked polyiodides so far isolated (up to an infinite supramolecular pseudopolyrotaxane with a poly[3]catenane axle). The missing link, i.e., the XRD structure of the BB/triiodide complex, is herein reported: structural similarities and novel Raman evidence, opening perspectives in the genesis of solid-state BB-based complex polyiodide networks from solution.
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Edis, Zehra, et Samir Haj Bloukh. « Antimicrobial V-Shaped Copper(II) Pentaiodide : Insights to Bonding Pattern and Susceptibility ». Molecules 27, no 19 (29 septembre 2022) : 6437. http://dx.doi.org/10.3390/molecules27196437.

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Antimicrobial resistance (AMR) is a major concern for the survival of mankind. COVID-19 accelerated another silent pandemic of AMR through the uncontrolled use of antibiotics and biocides. New generations of antimicrobial agents are needed to combat resistant pathogens. Crown ethers can be used as models for drug action because they are similar to antibiotics. Iodine is a well-known microbicide but is characterized by instability and short-term effectivity. Iodine can be stabilized in the form of polyiodides that have a rich topology but are dependent on their immediate surroundings. In addition, copper has been successfully used since the beginning of history as a biocidal agent. We, therefore, combined iodine and copper with the highly selective crown ether 1,4,7,10-tetraoxacyclododecane (12-crown-4). The morphology and composition of the new pentaiodide [Cu(12-crown-4)2]I5 was investigated. Its antimicrobial activities against a selection of 10 pathogens were studied. It was found that C. albicans WDCM 00054 is highly susceptible to [Cu(12-crown-4)2]I5. Additionally, the compound has good to intermediate antimicrobial activity against Gram-positive and Gram-negative bacilli. The chain-like pentaiodide structure is V-shaped and consists of iodine molecules with very short covalent bonds connected to triiodides by halogen bonding. The single crystal structure is arranged across the lattice fringes in the form of ribbons or honeycombs. The susceptibility of microorganisms towards polyiodides depends on polyiodide bonding patterns with halogen-, covalent-, and non-covalent bonding.
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Thèses sur le sujet "Polyiodides"

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Wieczorrek, Carsten. « Strukturelle Kenntnisse neuer Polyiodide ». [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=958516839.

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Edis, Zehra. « Polyiodide von 12-Krone-4-Komplexen mit Alkalikationen ». Köln, 1999. http://deposit.ddb.de/cgi-bin/dokserv?idn=957445989.

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Lippolis, Vito. « Studies on the coordination chemistry of macrocyclic ligands ». Thesis, University of Nottingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.311755.

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Nishiyama, Yoshio. « Reaction and dynamics of polyiodide anions in room temperature ionic liquids studied by time-resolved spectroscopy ». 京都大学 (Kyoto University), 2011. http://hdl.handle.net/2433/142402.

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Fiolka, Christoph [Verfasser], Gerd [Akademischer Betreuer] Meyer et Axel [Akademischer Betreuer] Klein. « Polyiodide komplexer Übergangsmetalle Mit einem Anhang über Ga(I)- und Ga(II)-Kronenether-Komplexe / Christoph Fiolka. Gutachter : Gerd Meyer ; Axel Klein ». Köln : Universitäts- und Stadtbibliothek Köln, 2011. http://d-nb.info/1038111730/34.

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Fiolka, Christoph Verfasser], Gerd [Akademischer Betreuer] [Meyer et Axel [Akademischer Betreuer] Klein. « Polyiodide komplexer Übergangsmetalle Mit einem Anhang über Ga(I)- und Ga(II)-Kronenether-Komplexe / Christoph Fiolka. Gutachter : Gerd Meyer ; Axel Klein ». Köln : Universitäts- und Stadtbibliothek Köln, 2011. http://nbn-resolving.de/urn:nbn:de:hbz:38-44393.

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Savastano, Matteo. « Polyfunctional Receptors for Ionic Species : Theoretical and Applicative Aspects ». Doctoral thesis, 2018. http://hdl.handle.net/2158/1116579.

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The endless game of Cations and Anions, together with their coordination chemistries, is presented and broken down for the Reader into several levels. First, the de facto asymmetry existing between Cation and Anion Coordination Chemistry is introduced and explained from an historical point of view, undertaking a brief excursus from prehistory up to present-day. In second instance, concepts and tools of Supramolecular Chemistry are set forth, including Host-Guest Chemistry, mainly with metal cations in mind, and an overview of intermolecular forces, anion recognition being the focus. Lastly, core differences between Anions and Cations are discussed from a chemico-physical perspective building on the aforesaid supramolecular concepts. Experimental results and their interest are arranged following the natural distinction between oppositely charged species. On the Cations’ side applied research was conducted, focusing on the obtainment of Pd(II)-based green nanostructured heterogeneous catalysts for the Sonogashira cross-coupling reaction through a non-covalent approach. Ligands design, choice of the functionalization strategy and of the supporting substrate (MWCNTS) are illustrated in the light of the principles of Supramolecular Chemistry exposed in the introductory part. The material is organized hierarchically moving from the design, synthesis and characterization of isolated tectons up to the self-assembled working catalysts, passing for the study of the binary receptor-metal cation, receptor-MWCNTs and metal cation-MWCNTs systems. Beyond the promising results, other possible applications of the overall methodology are sketched out, with particular reference to the preparation of small (< 5 nm) supported Cu(0) nanoparticles. The Anionic section has a more basic research connotation, focusing on solution thermodynamics and solid-state structural features of the anion-π interaction. For this purpose, a new series of homologous ligands (L1-L4), featuring s-tetrazine as a binding site, was prepared. Protonation and structural features of the free ligands are pre-emptively presented and related to variations in their structures. Results of the study of their interactions with anions is broken down into four different paragraphs as follows: introductory investigation featuring inorganic anions, complexes of organic anions, the case-study of L2, forming adducts with the whole series of halide anions, and stabilization of polyiodide systems in the solid state through anion-π interactions, in view of their possible use as crystalline conductors. 21 crystal structures and about 100 determined equilibrium constants (shared between protonation and complex formation reactions) strongly support anion-π interaction as a valuable asset for the design of selective receptors for anions, shedding light on its interplay with different supramolecular forces and solvent effects beyond what can be summarized in these few lines.
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Wieczorrek, Carsten [Verfasser]. « Strukturelle Kenntnisse neuer Polyiodide / Carsten Wieczorrek ». 2000. http://d-nb.info/958516839/34.

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Edis, Zehra [Verfasser]. « Polyiodide von 12-Krone-4-Komplexen mit Alkalikationen / vorgelegt von Zehra Edis ». 1999. http://d-nb.info/957445989/34.

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Ramalakshmi, D. « Studies on higher valent manganese complexes and polyiodide salts of metal complex cations ». Thesis, 1999. http://hdl.handle.net/2009/829.

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Chapitres de livres sur le sujet "Polyiodides"

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Shibaeva, R. P., E. B. Yagubskii, E. E. Laukhina et V. N. Laukhin. « Organic Conductors and Superconductors Based on (BEDT-TTF)-Polyiodides ». Dans Springer Proceedings in Physics, 342–48. Berlin, Heidelberg : Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-75424-1_74.

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Ulański, J., A. Tracz, J. K. Jeszka, E. Laukhina, A. Khomenko, P. Polanowski, D. Staerk et H. W. Helberg. « Conductivity of the ET Polyiodides Crystalline Networks Transformed into Superconducting Phase ». Dans Electrical and Related Properties of Organic Solids, 241–57. Dordrecht : Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5790-2_14.

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Actes de conférences sur le sujet "Polyiodides"

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Tarasov, Alexey, Andrey Petrov, Nikolai Belich, Natalia Udalova et Sergey Fateev. « New features of perovskite processing with Reactive Polyiodide Melts ». Dans Online School on Hybrid, Organic and Perovskite Photovoltaics. València : Fundació Scito, 2020. http://dx.doi.org/10.29363/nanoge.hope-pv.2020.021.

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Tarasov, Alexey, Ivan Turkevych, Said Kazaoui, Nikolai Belich, Aleksei Grishko, Sergey Fateev, Andrey Petrov, Michael Graetzel et Eugene Goodilin. « Strategic advantages of reactive polyiodide melts for scalable perovskite photovoltaics ». Dans 3rd International Conference on Perovskite Thin Film Photovoltaics, Photonics and Optoelectronics. Valencia : Fundació Scito, 2017. http://dx.doi.org/10.29363/nanoge.abxpvperopto.2018.073.

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