Luminescence and redox reactions of the metal-to-ligand charge-transfer excited state of tricarbonylchloro-(polypyridyl)rhenium(I) complexes
- 1 January 1986
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 82 (12) , 2401-2415
- https://doi.org/10.1039/f29868202401
Abstract
The metal-to-ligand charge-transfer (MLCT) excited state of tricarbonylchloro(polypyridyl)rhenium(I) complexes, [Re(CO)3(LL)(Cl)], (LL = 2,2-bipyridine, 4,4′-dimethyl-2,2′-bipyridine, 1,10-phenanthroline, 5-chloro-1,10-phenanthroline and 2,2′-bipyrazine) is emissive in solution at room temperature and undergoes facile electron-transfer reactions with a variety of electron donor and acceptor molecules. Laser photolysis studies on three aspects of the excited-state photophysics and photoredox chemistry are described in this work: (a) sensitivity of the room-temperature absorption and emission to variation in the nature of the polypyridyl ligand and solvent; (b) excited-state absorption spectral features and (c) reversible and irreversible ‘reductive’ quenching (using various amines as electron donors) and their relevance to the photocatalytic reduction of CO2 to CO.Keywords
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