Photoinduced Electron Transfer Processes In Homogeneous And Microheterogeneous Solutions

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Photoinduced Electron Transfer Processes in Homogeneous and Microheterogeneous Solutions

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ISBN 13 :
Total Pages : 34 pages
Book Rating : 4.:/5 (727 download)

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Download or read book Photoinduced Electron Transfer Processes in Homogeneous and Microheterogeneous Solutions written by and published by . This book was released on 1991 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The focus of the work described in this report is on single electron transfer reactions of excited states which culminate in the formation of stable or metastable even electron species. For the most part the studies have involved even electron organic substrates which are thus converted photochemically to odd electron species and then at some stage reconvert to even electron products. These reactions generally fall into two rather different categories. In one set of studies we have examined reactions in which the metastable reagents generated by single electron transfer quenching of an excited state undergo novel fragmentation reactions, chiefly involving C-C bond cleavage. These reactions often culminate in novel and potentially useful chemical reactions and frequently have the potential for leading to new chemical products otherwise unaffordable by conventional reaction paths. In a rather different investigation we have also studied reactions in which single electron transfer quenching of an excited state is followed by subsequent reactions which lead reversibly to metastable two electron products which, often stable in themselves, can nonetheless be reacted with each other or with other reagents to regenerate the starting materials with release of energy. 66 refs., 9 figs., 1 tab.

Photoinduced Electron Transfer Processes in Homogeneous and Microheterogeneous Solutions. Progress Report, April 16, 1992--December 1, 1992

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ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (727 download)

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Book Synopsis Photoinduced Electron Transfer Processes in Homogeneous and Microheterogeneous Solutions. Progress Report, April 16, 1992--December 1, 1992 by :

Download or read book Photoinduced Electron Transfer Processes in Homogeneous and Microheterogeneous Solutions. Progress Report, April 16, 1992--December 1, 1992 written by and published by . This book was released on 1992 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The studies have focused on rapid, efficient bond-fragmentation reactions initiated through photoinduced electron transfer. Electron transfer induced fragmentation of a number of donors have been examined, especially 1,2 diamines and related compounds. Two of the amines fragment with rate constants of 3 x 108 to 2 x 109 M−1sec−1. A series of amino-substituted pinacols and related compounds have also been examined; they undergo similar but slower fragmentation processes when converted to their cation radicals by photoinduced electron transfer. The studies with linked and polymeric electron donor- electron acceptor coupled molecules have also progressed. Several polymers containing diamine repeat units and anthraquinone or nitroaromatic acceptors have also been prepared that can be photoactivated by visible irradiation; they fragment efficiently in solution and photodegrade even in the solid state. The studies of singlet oxygen initiated fragmentation reactions of diamines, amino alcohols, and aminoketones have nearly been completed. Attention have been turned to fragmentable electron acceptors such as p- cyanobenzyl bromide; irradiation of electron donors such as methyl- or methoxy-naphthalenes can initiate efficient fragmentation of the electron deficient bromide.

Final Report, DOE Award No. DE-FG02-86ER13504 [Photoinduced Electron Transfer Processes in Homogeneous & Microheterogeneous Solutions].

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ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (684 download)

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Book Synopsis Final Report, DOE Award No. DE-FG02-86ER13504 [Photoinduced Electron Transfer Processes in Homogeneous & Microheterogeneous Solutions]. by :

Download or read book Final Report, DOE Award No. DE-FG02-86ER13504 [Photoinduced Electron Transfer Processes in Homogeneous & Microheterogeneous Solutions]. written by and published by . This book was released on 2001 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The focus of this research has been the study and development of useful chemical reactions initiated via photoinduced electron transfer events.

Heterogenous Photochemical Electron Transfer

Author : Michael Gratzel
Publisher : CRC Press
ISBN 13 : 1351081659
Total Pages : 170 pages
Book Rating : 4.3/5 (51 download)

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Book Synopsis Heterogenous Photochemical Electron Transfer by : Michael Gratzel

Download or read book Heterogenous Photochemical Electron Transfer written by Michael Gratzel and published by CRC Press. This book was released on 2018-01-18 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present monograph attempts to unify these diverse and exciting new developments within a common framework. First, the physical principles underlying heterogenous electron-transfer processes are outlined in a concise way and are compared to the homogeneous counterpart. This analysis includes the notion of the Fermi level in liquids and solids as well as the distribution of electronic energy levels in solids and liquids. A comparison is made between the salient kinetic features of homogeneous and heterogeneous electron transfer reactions. This establishes the basis for the subsequent treatment of the transduction of excitation energy and photo-initiated electron transfer in organized molecular assemblies, such as micelles, vesicles and monolayers. Transmembrane redox processes are critically reviewed. Particular attention is given to semiconductor electrodes and particles. This includes a discussion of quantum size effects, the nature of space charge layers as well as surface states and the dynamics of charge carrier-induced redox reactions at the semiconductor solution interface. These processes are of fundamental importance in such diverse fields as photochromism, electrochromic displays, electroreprography and photography, information storage, photocatalysis, photodegradation of paints, and solar energy conversion.

Scientific and Technical Aerospace Reports

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ISBN 13 :
Total Pages : 1572 pages
Book Rating : 4.:/5 (31 download)

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Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 1572 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Energy Research Abstracts

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Publisher :
ISBN 13 :
Total Pages : 654 pages
Book Rating : 4.3/5 (129 download)

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Download or read book Energy Research Abstracts written by and published by . This book was released on 1993 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Photoinduced Electron Transfer V

Author : A. Albini
Publisher : Springer
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Photoinduced Electron Transfer V by : A. Albini

Download or read book Photoinduced Electron Transfer V written by A. Albini and published by Springer. This book was released on 1993-09-22 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1. P. Maslak: Fragmentations by Photoinduced Electron Transfer. Fundamentals and Practical Aspects 2. P.K. Freeman, S.A. Hatlevig: The Photochemistry of Polyhalocompounds, Dehalogenation by Photoinduced Electron Transfer, New Methods of Toxic Waste Disposal 3. J.-P. Soumillion: Photoinduced Electron Transfer Employing Organic Anions 4. A. Albini, E. Fasani, M. Mella: PET-Reactions of Aromatic Compounds 5. G. Pandey: Photoinduced Electron Transfer (PET) in Organic Synthesis 6.R.A. Bissell, A.P. de Silva, H.Q.N. Gunaratne, P.L.M. Lynch, G.E.M. Maguire, C.P. McCoy, K.R.A.S. Sandanayake: Fluorescent PET (Photoinduced Electron Transfer) Sensors

Photoinduced Electron Transfer

Author : Marye Anne Fox
Publisher : Elsevier Publishing Company
ISBN 13 :
Total Pages : 780 pages
Book Rating : 4.:/5 (318 download)

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Download or read book Photoinduced Electron Transfer written by Marye Anne Fox and published by Elsevier Publishing Company. This book was released on 1988 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Electron Transfer

Author : Shunichi Fukuzumi
Publisher : John Wiley & Sons
ISBN 13 : 3527651802
Total Pages : 240 pages
Book Rating : 4.5/5 (276 download)

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Book Synopsis Electron Transfer by : Shunichi Fukuzumi

Download or read book Electron Transfer written by Shunichi Fukuzumi and published by John Wiley & Sons. This book was released on 2020-01-15 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by one of the top scientists in this field, this is a systematic overview of the fundamental concepts and powerful applications. The author presents the central theories and mechanisms in electron transfer, followed by several systems in nature where this is important, while also covering modern green applications. An invaluable resource for graduate students and researchers working in this field in academia and industry.

Government Reports Annual Index

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ISBN 13 :
Total Pages : 1646 pages
Book Rating : 4.3/5 (91 download)

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Download or read book Government Reports Annual Index written by and published by . This book was released on 1991 with total page 1646 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.

Photoinduced Electron Transfer: Photoinduced electron transfer reactions, organic substrates

Author : Marye Anne Fox
Publisher :
ISBN 13 :
Total Pages : 784 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Photoinduced Electron Transfer: Photoinduced electron transfer reactions, organic substrates by : Marye Anne Fox

Download or read book Photoinduced Electron Transfer: Photoinduced electron transfer reactions, organic substrates written by Marye Anne Fox and published by . This book was released on 1988 with total page 784 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Photoinduced Electron Transfer I

Author : David F. Eaton
Publisher : Springer
ISBN 13 :
Total Pages : 256 pages
Book Rating : 4.:/5 (318 download)

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Download or read book Photoinduced Electron Transfer I written by David F. Eaton and published by Springer. This book was released on 1990-09-17 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Summaries of FY ... Research in the Chemical Sciences

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ISBN 13 :
Total Pages : 176 pages
Book Rating : 4.F/5 ( download)

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Download or read book Summaries of FY ... Research in the Chemical Sciences written by and published by . This book was released on 1995 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Advances in Electron Transfer Chemistry

Author : Patrick S. Mariano
Publisher : Elsevier
ISBN 13 : 1483285103
Total Pages : 233 pages
Book Rating : 4.4/5 (832 download)

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Download or read book Advances in Electron Transfer Chemistry written by Patrick S. Mariano and published by Elsevier. This book was released on 2013-10-22 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Electron Transfer Chemistry, Volume 4 presents the reaction mechanisms involving the movement of single electrons. This book discusses the electron transfer reactions in organic, biochemical, organometallic, and excited state systems. Organized into four chapters, this volume begins with an overview of the photochemical behavior of two classes of sulfonium salt derivatives. This text then examines the parameters that control the efficiencies for radical ion pair formation. Other chapters consider the progress in the development of parameters that control the dynamics and reaction pathways for radical ion pairs produced by the diffusional quenching of photoexcited molecules. This book discusses as well the criteria for distinguishing concerted from stepwise mechanisms in electrochemical and homogeneous reductive cleavage reactions in polar solvents. The final chapter deals with excited-state chemical transformation, particularly on photoinduced SET reactions in which amines and related substances serve as electron donors. This book is a valuable resource for scientists and electrochemists.

Energy and Water Development Appropriations for 1998

Author : United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development
Publisher :
ISBN 13 :
Total Pages : 1918 pages
Book Rating : 4.F/5 ( download)

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Energy and Water Development Appropriations for 1998: Secretary of Energy

Author : United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development
Publisher :
ISBN 13 :
Total Pages : 1300 pages
Book Rating : 4.:/5 ( download)

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Book Synopsis Energy and Water Development Appropriations for 1998: Secretary of Energy by : United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development

Download or read book Energy and Water Development Appropriations for 1998: Secretary of Energy written by United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development and published by . This book was released on 1997 with total page 1300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Electron Transfer in Chemistry, Principles, Theories, Methods, and Techniques

Author : Vincenzo Balzani
Publisher : Wiley-VCH
ISBN 13 : 9783527299126
Total Pages : 864 pages
Book Rating : 4.2/5 (991 download)

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Book Synopsis Electron Transfer in Chemistry, Principles, Theories, Methods, and Techniques by : Vincenzo Balzani

Download or read book Electron Transfer in Chemistry, Principles, Theories, Methods, and Techniques written by Vincenzo Balzani and published by Wiley-VCH. This book was released on 2001-05-02 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electron transfer is the most important process to take place in natural and artificial chemical systems, playing a fundamental role, for example, in photosynthesis as well as in photography. Electron transfer reactions - oxidations and reductions - are involved in, among others, a variety of energy conversion processes, analytical methods, synthetic strategies, and information processing systems. This five-volume work is the only comprehensive yet up-to-date reference on electron transfer processes. Following a foreword by Nobel prize-winner R. A. Marcus, renowned experts from all over the world provide an interdisciplinary overview of every aspect of electron transfer including theoretical-physicochemical backgrounds, latest analytical techniques to identify, monitor and measure the rate of electron transfer, utilizing electron transfer reactions in organic synthesis and catalysis, electron transfer in the gas phase or in special heterogeneous systems such as zeolites or sensitized electrodes. Other central issues are the study of biological systems and the biomimetic electron transfer processes in artificial supramolecular systems. Finally, a complete volume is dedicated to the application of electron transfer in molecular-level electronics, imaging processes and energy conversion. Each chapter is complemented by numerous tables, formulae and illustrations providing an indispensable wealth of information. All references are cross-indexed throughout the work for easy access to this highly complex topic. Whether for quickly looking-up a keyword or as a thorough introduction to a special aspect, this is an essential handbook for everyone working in the field, from experts to postgraduates, from synthetic chemists, physicochemists or biochemists to research groups in material sciences.