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Electron Transfer Reactions Of Excited States Of Chromium Iii Polypyridyl Complexes In Fluid Solution
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Book Synopsis Electron Transfer Reactions of Excited States of Chromium (III) Polypyridyl Complexes in Fluid Solution by : Lu Zhang
Download or read book Electron Transfer Reactions of Excited States of Chromium (III) Polypyridyl Complexes in Fluid Solution written by Lu Zhang and published by . This book was released on 1997 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reactions of the Excited State of Polypyridyl Chromium(III) Ion by :
Download or read book Reactions of the Excited State of Polypyridyl Chromium(III) Ion written by and published by . This book was released on 1990 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: There has been much recent interest in the photochemistry and photophysics of transition metal polypyridine complexes due to the possibility of their use in solar energy conversion systems. The excited state of these compounds are known to undergo useful electron transfer and energy transfer reactions. This work attempts to elucidate the mechanism of the quenching of *CrL3{sup 3+} (where L = 2,2(prime)-bipyridine, 4,4(prime)-dimethyl-2,2(prime)-bipyridine, 1,10-phenanthroline, 5-chloro-1,10-phenanthroline, 5-methyl-1,10-phenanthroline) by oxalate ions in neutral pH. Evidence suggests an ion-pairing pre-equilibrium followed by rate limiting electron transfer to produce CrL3{sup 2+} and CO2− can then react with ground state chromium(III) species to produce another mole of the reduced product or it can produce a secondary transient as in the case of phenanthroline and substituted phenanthroline complexes. The secondary transient reacts to produce CrL3{sup 2+} in a subsequent reaction. 85 refs., 24 figs., 7 tabs.
Book Synopsis Light Induced Electron Transfer Reactions of Metal Complexes by :
Download or read book Light Induced Electron Transfer Reactions of Metal Complexes written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Properties of the excited states of tris(2,2'-bipyridine) and tris(1,10-phenanthroline) complexes of chromium(III), iron(II), ruthenium(II), osmium(II), rhodium(III), and iridium(III) are described. The electron transfer reactions of the ground and excited states are discussed and interpreted in terms of the driving force for the reaction and the distortions of the excited states relative to the corresponding ground states. General considerations relevant to the conversion of light into chemical energy are presented and progress in the use of polypyridine complexes to effect the light decomposition of water into hydrogen and oxygen is reviewed.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Nonbridging Ligand Effects in Some Electron Transfer Reactions of Chromium (III) Complexes with Chromium (II). by : David Eugene Pennington
Download or read book Nonbridging Ligand Effects in Some Electron Transfer Reactions of Chromium (III) Complexes with Chromium (II). written by David Eugene Pennington and published by . This book was released on with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Equilibrium and Electron-transfer Reactions of Chromium (II) Complexes by : Mohammad Jane Gholami
Download or read book Equilibrium and Electron-transfer Reactions of Chromium (II) Complexes written by Mohammad Jane Gholami and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Correlation Between Excited State Orbital Parentage and Excited State Acid-base Behavior in Transition Metal Complexes by : Jim Dimitrakopoulos
Download or read book Correlation Between Excited State Orbital Parentage and Excited State Acid-base Behavior in Transition Metal Complexes written by Jim Dimitrakopoulos and published by . This book was released on 2013 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chromium (III) polypyridyl and rhodium (III) polypyridyl complexes have been the subjects of considerable interest because of their extraordinary rich photophysical and photochemical properties. The following complexes were synthesized and studied: bis(2,2'-bipyridine) (2,3-bis (pyridyl)pyrazine) chromium(III) Hexafluorophosphate, tris(2,2'-bipyridine) chromium(III) Hexafluorophosphate, bis(1,10-phenanthroline) (2,3-bis(pyridyl)pyrazine) chromium(III) Hexafluorophosphate, bis(2,2'-bipyridine)(2,3-bis(pyridyl)pyrazine) rhodium(III) Nitrate, tris(2,2'-bipyridine) rhodium(III) Nitrate, and bis(2,2'-bipyridine)bis chloride rhodium(III)Hexafluorophosphate. All chromium polypyridyl complexes studied exhibit only metal-centered emissions (d-d); they display a fluorescence signal at approximately 695 nm ( 4A2g (c) 4T2g) and a phosphorescence signal at approximately 730 nm (4A2g(c) 2Eg). Quenching of both emissions occurs at high pH, while emission is enhanced at low pH. The [Rh(bpy)2dpp]3+ complex is found to display both metal-centered and ligand-centered emissions. The metal-centered emission (d-d) is the dominant luminescence feature at 77 K in ethanol-methanol glasses (4:1 v/v), but the ligand-centered (pi ¨ pi*) emission is enhanced relative to the metal-centered luminescence in fluid acetonitrile solutions. The bis complex, [Rh(bpy) 2C12]+, displays a dominant metal centered emission under all conditions that were studied. The [Rh(bpy)3] 3+ complex emits only from ligand-centered excited states at 77K. From this thesis, it became clear that the excited-state properties of a complex are related to the energy ordering of its low-energy excited states and, particularly, to the orbital nature of its lowest excited state. The energy positions of the MC, MLCT, and LC excited states depend on the ligand field strength, the redox properties of metal and ligands, and intrinsic properties of the ligands, respectively. Thus, in a series of complexes of the same metal ion, the energy ordering of the various excited states, and particularly the orbital nature of the lowest excited state, can be controlled by the choice of suitable ligands. It is therefore possible to design complexes having, at least to a certain degree, desired properties.
Download or read book Solar Energy Update written by and published by . This book was released on 1981 with total page 698 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electronic Structure and Excited State Dynamics of Chromium(III) Complexes by : Joel Nicholas Schrauben
Download or read book Electronic Structure and Excited State Dynamics of Chromium(III) Complexes written by Joel Nicholas Schrauben and published by . This book was released on 2010 with total page 734 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Photosensitization and Photocatalysis Using Inorganic and Organometallic Compounds by : K. Kalyanasundaram
Download or read book Photosensitization and Photocatalysis Using Inorganic and Organometallic Compounds written by K. Kalyanasundaram and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photosensitization and photocatalysis refer to processes by which permanent chemical transformations are induced on substrates (organic/inorganic) by radiation to which the substrates themselves are transparent. Such transformations can be highly specific, very efficient, and occur under mild conditions. Herein lies the power of photochemical methods for possible applications in the field of conversion and storage of solar energy. This book provides a recent survey of the progress in this important area in catalysis, with an emphasis on inorganic complexes and organometallic compounds as the key light aborbers. The book is organized in three parts: fundamentals, followed by applications. Discussions cover a wide variety of photosensitized or photocatalyzed reactions: decomposition of water, reduction of CO2 and CO; spectral sensitization in photoelectrochemical cells; transformations (oxidation, reduction, isomerization, hydrogenation, dehydrogenation, carbonylation, etc.) of organics such as alkanes, alkenes, alcohols, etc. In view of the variety of systems (sensitizers, substrates) and the topics covered, the volume is unique in the field of photochemistry and will appeal to academic and industrial researchers in various subdisciplines of chemistry, material science and catalysis.
Book Synopsis Electron Transfer Reactions Between L, L0-phenanthroline Complexes of Chromium (II) and Chromium (III). by : Joseph Edward Wreen
Download or read book Electron Transfer Reactions Between L, L0-phenanthroline Complexes of Chromium (II) and Chromium (III). written by Joseph Edward Wreen and published by . This book was released on 1974 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reactions of the Excited State of Polypyridyl Chromium(III) Ions by : Carl R. Steffan
Download or read book Reactions of the Excited State of Polypyridyl Chromium(III) Ions written by Carl R. Steffan and published by . This book was released on 1990 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Photoinduced Electron Transfer by : Marye Anne Fox
Download or read book Photoinduced Electron Transfer written by Marye Anne Fox and published by . This book was released on 1988 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electron Transfer Reactions of Carboxylatopenta-amminechromium(III) Complexes by : Chih-Ling Liu
Download or read book Electron Transfer Reactions of Carboxylatopenta-amminechromium(III) Complexes written by Chih-Ling Liu and published by . This book was released on 1977 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Photochemical Conversion and Storage of Solar Energy by : John Connolly
Download or read book Photochemical Conversion and Storage of Solar Energy written by John Connolly and published by Elsevier. This book was released on 2012-12-02 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photochemical Conversion and Storage of Solar Energy contains the proceedings of the Third International Conference on Photochemical Conversion and Storage of Solar Energy held in Boulder, Colorado, on August 3-8, 1980. The papers review the state of the art in the areas of photochemistry and photoelectrochemistry in the context of solar energy conversion and storage. Topics covered include photosynthetic quantum conversion; biomimetic systems for solar energy conversion; and photochemical electron transfer reactions in homogeneous solutions. This volume is comprised of 11 chapters and begins by describing an artificial photosynthetic system that can capture solar quanta and convert them into a stable chemical form. The discussion then turns to biomimetic approaches to solar energy conversion; fluorescent concentrators for photovoltaic cells; requirements for homogeneous photoredox chemistry in inorganic systems; and the use of inorganic components coupled with catalysts in heterogeneous assemblies for photochemical water splitting. The following chapters focus on photogalvanic cells, electrochemical photovoltaic cells, and photoelectrosynthetic reactions at the semiconductor-electrolyte interface. The final chapter examines the thermodynamic limits on photoconversion and storage of solar energy. This monograph will be of interest to chemists and other scientists concerned with the photochemical aspects of solar energy conversion and storage.
Download or read book Inorganic Photochemistry written by and published by Academic Press. This book was released on 2011-07-14 with total page 461 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Advances in Inorganic Chemistry series present timely and informative summaries of the current progress in a variety of subject areas within inorganic chemistry, ranging from bio-inorganic to solid state studies. This acclaimed serial features reviews written by experts in the field and serves as an indispensable reference to advanced researchers. Each volume contains an index, and each chapter is fully referenced. Features comprehensive reviews on the latest developments Includes contributions from leading experts in the field Serves as an indispensable reference to advanced researchers
