Excited state electron-transfer reactions of transition metal complexes

Abstract

-The properties of excited states of transition metal complexes are briefly reviewed. The outer-sphere electron transfer reactions of the excited states of complexes containing 2,2'-bipyridine or 1,10-phenanthroline ligands are discussed in detail, with particular reference to electron ~ energy transfer quenching and conversion of light into chemical energy. The kinetic aspects of outer-sphere electron transfer reactions involving excited states are examined with particular reference to the so-called "Marcus inverted behavior" which is not obser:ved in most of the systems studied. The extension of the kinetic formalism used for electron transfer reactions to energy transfer processes yields a unified view of "classical" and " nonclassical" energy transfer behavior.

Controlled Molecular Orientation in an Adlayer of a Supramolecular Assembly Consisting of an Open‐Cage C60 Derivative and ZnII Octaethylporphyrin on Au(111)

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The supramolecular assembly of porphyrin-fullerene systems has been studied extensively because of interest in photoinduced energy-and electron-transfer processes. [1][2][3][4][5][6] Fullerenes, in particular, are considered to be suitable building blocks for the formation of three-dimensional molecular architectures because of their ability to act as strong pelectron acceptors. [1] Recently, several open-cage C 60 derivatives were synthesized [7][8][9] and the unique ability of 1 to encapsulate a hydrogen molecule (H 2 @1) was discovered.

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Electronic spectra of RMn(CO)3(α-diimine) (RH, CH3): a CASSCF/CCI comparative study of the lowest singlet excited states

“…The following Gaussian basis sets were used: for the manganese atom a (15, 11,6) set contracted to [ 9,6,3 ] [3S], for the first row atoms a (10,6) set contracted to [ 4,2 ] [38], for hydrogen either a (6,l) set contracted to [ 3,l ] [39] (for the atom directly linked to the metal center), or a (4) set contracted [2] [38] for the other hydrogen atoms.…”

Spectral characteristics and fluorescence quenching of N,N′-bis(4-pyridyl)-3,4:9,10-perylenebis(dicarboximide) (BPPD)

“…These properties make PBI derivatives attractive as potential laser dyes [7,8], photo-sensitizer for electron transfer reactions [9][10][11], artificial photosynthesis [12][13][14], photovoltaic devices [15][16][17] and some of PBI derivatives serve as liquid crystal [18], organic light emitting diodes [19,20] and light harvesting arrays [21,22] as well as photoreactive thin film [23,24]. Some of the compounds were designed to serve as stable photochemical oxidants for use in novel photonic and electronic materials [25].…”