Quenching and sensitization processes of coordination compounds

Balzani, Vincenzo; Moggi, L.; Manfrin, M. F.; Bolletta, Fabrizio; Laurence, Gerald S.

doi:10.1016/s0010-8545(00)82070-6

Cited by 218 publications

(100 citation statements)

References 161 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The prototype of these complexes is the already famous tris-bipyridine Ru(II) complex, Ru(bpy) 3 2 +. The properties of the lowest excited state of .this and other analogous complexes are summarized in Table 1.…”

Section: Excited State Redox Properties Of Bipyridine and Phenanthrolmentioning

confidence: 99%

“…Until a few years ago, the photochemical studies in this field were mostly confined to unimolecular photochemical processes, such as homolytic and heterolytic metal-ligand bond breaking or isomerization reactions (1,2). In the last few years, however, the interest has moved towards bimolecular processes (3) with particular emphasis on electron transfer reactions (4). This last class of photochemical reactions is very interesting for at least three reasons: (i) they are very promising for the conversion of light energy (including solar energy) into chemical energy; (ii) they can lead to camplaxes having unusual oxidation states and thus unusual chemical (catalytic) properties; (iii) they allow us to check the theories of outersphere electron transfer reactions (5-7) over a broad range of free energy change.…”

Section: Introductionmentioning

confidence: 99%

“…As a consequence, they exhibit a great variety of photophysical and photochemical properties (1)(2)(3)(4)8). The important excited states of a molecule from the point of view of bimolecular photochemical processes in fluid solution are those with lifetime langer than 10-9 -1o-10 s. For many organic molecules, the lowest spin-allowed an~or the lowest spin-forbidden excited state satisfy this condition.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Excited state electron-transfer reactions of transition metal complexes

Balzani

Bolletta

Scandola

et al. 1979

Pure and Applied Chemistry

Self Cite

View full text Add to dashboard Cite

-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.

show abstract

Section: Excited State Redox Properties Of Bipyridine and Phenanthrolmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Excited state electron-transfer reactions of transition metal complexes

Balzani

Bolletta

Scandola

et al. 1979

Pure and Applied Chemistry

Self Cite

View full text Add to dashboard Cite

show abstract

“…Reactions of molecular excited states, including primarily energy and electron transfer, are well known for organic molecules but have only recently been examined in metal complexes. Balzani and co-workers have published two excellent reviews on the subject, emphasizing energy [49] and electron transfer [50].…”

Section: Photoionizationmentioning

confidence: 99%

Solar energy storage reactions involving metal complexes

Maverick¹,

Gray²

1980

Pure and Applied Chemistry

View full text Add to dashboard Cite

-Photochemical properties of transition metal complexes are discussed as they relate to possible schemes for energy storage. Complexes of copper(I) with r-acceptor ligamds have been used to sensitize isomerizations of organic molecules, and there is room for considerable further investigation in this area. Electron transfer reactions have been more intensively studied. These reactions fall into three broad categories: ionization, oxidative addition/reductive elimination, and excited state electron transfer. Experiments in the first two categories have ierally led to rather poor storage efficiency and have required ultraviolet light. But long-lived excited states of coordination compounds can participate in chemical reactions with high efficiency, and such systems are promising for solar energy storage. Specific systems of this type that are discussed in detail involve electron transfer quenching of the lowest emissive excited states of Ru(2,2'_bipyridine), M (diisocyanoalkane) (M=Rh,Ir), and Mo6Cl.

show abstract

“…Esta última observação fez com que estudos de supressão de luminescência fossem possíveis 6 . Esses estudos levaram a investigações mais detalhadas e sofisticadas dos processos que ocorrem nos estados excitados 7 , tais como as reações de transferência de elétrons e de energia 8 , estimulando as investigações dos processos de conversão de energia solar em energia elétrica ou química 9 . Também foi estudada a fotoquímica de novas famílias de complexos do tipo Werner 10 , tais como os de Rh(III), Ir(III) e Ru(II), dos complexos com polipiridinas, e dos sistemas envolvendo S e P coordenados com novos tipos de macrociclos, incluindo aqueles de interesse biológico 11 .…”

Section: Introductionunclassified