Electronic Delocalization and Charge-transfer Properties of Chemical and Biological Systems as Measured by Stark Spectroscopy PDF Download
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Author: Arindam Chowdhury
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Arindam Chowdhury
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author:
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ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 812
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Author: Dennis Hyun Oh
Publisher:
ISBN:
Category : Proteins
Languages : en
Pages : 362
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Category : Dissertation abstracts
Languages : en
Pages : 776
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Author: A.M. Kuznetrsov
Publisher: CRC Press
ISBN: 100010270X
Category : Science
Languages : en
Pages : 637
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Book Description
This book covers the various processes of charge transfer in physics, chemistry and biology and shows the similarities and differences between them. It focuses on the physical mechanisms of the elementary processes to demonstrate their common physical nature.
Author: Laba Karki
Publisher:
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Category :
Languages : en
Pages :
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This thesis describes the application of electroabsorption spectroscopy to the study of excited state properties and electron transfer in inorganic mixed-valence complexes. Specifically these measurements address changes in the dipole moments, $\lbrack \Delta\mu\sb{12}\rbrack ,$ and polarizabilities, $\Delta\alpha\sb{12},$ between the ground and the Franck-Condon excited state. These studies show the invalidity of some previous assumptions of about the charge transfer distances $(R\sb{\rm ab})$ in cyano-bridged dinuclear complexes, and further lead to a better estimate of some key electron transfer parameters, the adiabatic coupling energy $(H\sb{\rm ab})$ and the solvent reorganization energy $(\lambda\sb{\rm s}).$ Electroabsorption studies were also used to interrogate excited state localization versus delocalization of charge in the phenathroline ligands of a ruthenium tris-phenanthroline complex, and to address the extent of electronic coupling in novel porphyrin dimers. Finally, electroabsorption study was used to evaluate state specific contributions to the first hyperpolarizability $(\beta )$ in conjugated porphyrin-based and heteroatomic polyene-based push pull chromophores in the context of Oudar's two state model.
Author: J. A. McCleverty
Publisher: Elsevier Science
ISBN: 9780080437484
Category : Science
Languages : en
Pages : 874
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Book Description
Comprehensive Coordination Chemistry II (CCC II) is the sequel to what has become a classic in the field, Comprehensive Coordination Chemistry, published in 1987. CCC II builds on the first and surveys new developments authoritatively in over 200 newly comissioned chapters, with an emphasis on current trends in biology, materials science and other areas of contemporary scientific interest.
Author: Michael K. Johnson
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 496
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Book Description
Identifies unifying concepts applicable to electron transfer between metal centers in both solid-state materials and biological systems. The 23 contributions cover such topics as: peptides and proteins; inorganic complexes; and theoretical and experimental aspects of solid state transfer. For materials scientists, solid state scientists, and biochemists. Annotation copyrighted by Book News, Inc., Portland, OR
Author: M.J. Allen
Publisher: Springer Science & Business Media
ISBN: 1461305578
Category : Science
Languages : en
Pages : 378
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Author: Angela Bischof
Publisher:
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Category :
Languages : en
Pages :
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Electron transfer processes are widespread in chemistry, and form the basis of photosynthetic systems and molecular electronic devices. However, studying electron transfer processes in these systems directly can be difficult. In order to understand the fundamental processes in these systems, charge transfer (CT) and mixed-valence (MV) compounds have been used extensively as model systems to study the basics of electron transfer reactions under various conditions. This dissertation uses steady-state spectroscopic analyses to determine how structure affects electronic coupling and charge delocalization in several MV and CT systems that are of interest for understanding the fundamental processes that occur in organic devices. In Chapter 2, we find that the introduction of an ethylene bridging ligand between two bis(alkoxy)benzene redox sites increases the intramolecular electronic coupling when compared to the system in which the redox active sites are directly connected, despite an increase in distance. We quantify the increase in coupling as a function of both distance and steric effects. Chapter 3 focuses on the systematic investigation of how van der Waals forces control the electronic coupling in non-covalently bound organic mixed-valence naphthalene diimide dimers, and we find that, in general, as the van der Waals forces in the intermolecular complex increase so does the electronic coupling. Chapter 4 focuses on the analysis of the CT band in donor-acceptor charge-transfer liquid crystals (DACLCs) and uses resonance Raman spectroscopy to investigate the phase-dependence of the charge transfer transition and the vibrational modes that are associated with this transition. Overall, this dissertation contributes to the fundamental understanding of how structure impacts charge transfer in organic MV and CT systems.
