Journal
CHEMICAL SOCIETY REVIEWS
Volume 30, Issue 2, Pages 113-124Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b000703j
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Over the past two decades the photochemical and photophysical properties of Cu(I)-phenanthrolines ([Cu(NN)(2)](+)) have been investigated in detail. A high degree of control of the metal-to-ligand charge-transfer (MLCT) absorption and luminescence properties of [Cu(NN)(2)](+) is now possible, by means of a thorough choice and positioning of the phenanthroline ligand substituents. Exchange of Cu(I) with a variety of metal ions (Mn+) allows tuning of the electrochemical and photophysical properties of the [M(NN)(2)](n+) motif. This has prompted the design of fascinating multicomponent molecular architectures (catenates, knots, rotaxanes, dendrimers) in which photoinduced intercomponent processes like energy- and electron-transfer occur. The possibility of a fine tuning of the absorption and emission properties, long excited state lifetimes, and a characteristic structural flexibility, suggest Cu(I)-phenathrolines as interesting alternatives to Ru(II)- polypyridines, still the most popular family of complexes among inorganic photochemists.
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