Photoinduced Charge Separation In Linked Donor Chromophore Acceptor Systems
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Total Pages | : 3 |
Release | : 1993 |
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Focus has been mainly on preparation and characterization of triply bridged dinuclear complexes containing a tris-2-2'- bipyridineruthenium chromophore and a second tris-bipyridine metal complex which is to serve as electron donor or acceptor, and of linked RuL[sub 3]-containing D-C-A complexes where D is a phenothiazine donor and A is a diquat type acceptor. (DLC).
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Release | : 2001 |
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A major experimental challenge in any study of intramolecular donor/acceptor (D/A) interactions is separating the variables which affect coupling. This is especially difficult when trying to evaluate the extent of through-bond superexchange. The systems of dinuclear complexes described below are unique in that the D/A connectivity can be varied without concomitant changes in D/A separation and relative orientation. Consequently, it has been possible to experimentally evaluate the effect of D/A linkage on coupling without introducing ambiguities from other structural changes. Furthermore, some of these systems are amenable to detailed theoretical treatment which allows quantitative comparisons between experiment and theory. A much more detailed picture of the D/A interaction is, thus, provided. Sections of this report include: unique structural aspects of[M(BBA)[sub 3]M[prime]] complexes; energy transfer in photoexcited[Ru(II)(BBA)[sub 3]Fe(II)][sup 4+] complexes; electrochemical investigation of[Fe(BBA)[sub 3]Fe][sup 4+]; optically-induced electron transfer in[Fe(II)(BBA)[sub 3]Fe(III)][sup 5+] mixed-valent complexes, where BBA=[alpha], [omega]-bisbipyridylalkane.
Author | : |
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Total Pages | : 3 |
Release | : 1993 |
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Focus has been mainly on preparation and characterization of triply bridged dinuclear complexes containing a tris-2-2'- bipyridineruthenium chromophore and a second tris-bipyridine metal complex which is to serve as electron donor or acceptor, and of linked RuL3-containing D-C-A complexes where D is a phenothiazine donor and A is a diquat type acceptor. (DLC).
Author | : Matthew T. Rawls |
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Total Pages | : 109 |
Release | : 2007 |
Genre | : Charge exchange |
ISBN | : 9780549054320 |
Covalently bound donor-acceptor species were synthesized in an attempt to extend the self assembly concept to a free chromophore system. A wide variety of DA species were studied, but ultimately triad-like behavior was not observed with free chromophore systems. Though attempts were made to control solvent effects, coulombic interactions, and DA flexibility, simple self assembled triad like behavior did not arise.
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Release | : 2009 |
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Author | : Steven L. Larson |
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Total Pages | : 314 |
Release | : 1994 |
Genre | : Electron donor-acceptor complexes |
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Release | : 2010 |
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Total Pages | : 472 |
Release | : 1993-08 |
Genre | : Power resources |
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Total Pages | : 3 |
Release | : 1996 |
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Contributions from through-space and through-bond interactions to the electronic coupling matrix elements for photoinduced charge separation and recombination in linked donor-spacer-acceptor molecules were studied. The molecules consisted of a 4-piperidinyl-naphthalene-1,8-dicarboximide electron donor and a N-(n-octyl)pyromellitimide electron acceptor attached to the 1,5- and 1,8-positions of either anthracene or dibenzobicyclo(2.2.2)octatriene spacers.
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Total Pages | : 14 |
Release | : 1993 |
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The present report gives a brief account of the following elements of work related to photochemical electron transfer themes: (1) the synthesis and Photochemical characterization of chromophore-bound peptides and amino acid model compounds based on the amino acids, tryptophan and the spacer residue, alanine (Ala); (2) the study of binding of cationic organic dyes to a peptide electrolyte, for which cooperative dye loading and helix formation is important; (3) the completion of work on a new series of acridinium chromophores that have rod-like'' arrangements of linked aryl rings for assembly of electron donor-acceptor systems that exhibit long lived charge separation; and (4) use of the modified form of the peptide, poly-L-histidine, as a template for sulfide oxidation.