Effect on MLCT excited states of electronic delocalization in the acceptor ligand

Journal Article · Wed Sep 26 00:00:00 EDT 1990 · Journal of the American Chemical Society; (United States)

DOI:https://doi.org/10.1021/ja00176a049· OSTI ID:5494366

Boyde, S; Strouse, G F; Jones, Jr, W E; Meyer, T J ^[1]

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1. Univ. of North Carolina, Chapel Hill (USA)

The metal to ligand charge transfer (MLCT) excited states of (Ru(bpy){sub 3}){sup 2+} (bpy = 2,2{prime}-bipyridyl) and related polypyridyl complexes of Ru{sup II}, Os{sup II}, or Re{sup I} have been utilized extensively as sensitizers of photochemical electron transfer. A fundamental limitation exists in the ability of these complexes to utilize low-energy visible or very near infrared light. The authors report here an observation that promises to extend the useful range of these excited states. It is based on the greatly enhanced lifetimes that can result when the electron that is excited finds itself on an acceptor ligand in which there is an extended, delocalized {pi}{sup *} system.

• OSTI ID: 5494366
• Journal Information: Journal of the American Chemical Society; (United States), Journal Name: Journal of the American Chemical Society; (United States) Vol. 112:20; ISSN 0002-7863; ISSN JACSA
• Country of Publication: United States
• Language: English

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& Thermochemical Conversion-- (1980-)
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500 -- Photochemistry
CHEMICAL REACTIONS
COMPLEXES
ELECTRON TRANSFER
ENERGY LEVELS
EXCITED STATES
LIFETIME
LIGANDS
MEASURING METHODS
PHOTOCHEMICAL REACTIONS
RUTHENIUM COMPLEXES
TRANSITION ELEMENT COMPLEXES