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Efficient and Selective Photochemical Labilization of a Given Bidentate Ligand in Mixed Ruthenium(II) Complexes of the Ru(phen) 2 L 2+ and Ru(bipy) 2 L 2+ Family (L = Sterically Hindering Chelate)
Author(s) -
Laemmel AnneChantal,
Collin JeanPaul,
Sauvage JeanPierre
Publication year - 1999
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/(sici)1099-0682(199903)1999:3<383::aid-ejic383>3.0.co;2-9
Subject(s) - chemistry , ruthenium , steric effects , denticity , ligand (biochemistry) , phenanthroline , bipyridine , chelation , medicinal chemistry , photochemistry , 2,2' bipyridine , stereochemistry , crystallography , catalysis , organic chemistry , crystal structure , biochemistry , receptor
Mixed ruthenium(II) complexes containing 1,10‐phenanthroline (or 2,2′‐bipyridine) and a sterically congested bidentate ligand such as 2,9‐diphenyl‐1,10‐phenanthroline, 6,6′‐dimethyl‐ or 6,6′‐diphenyl‐2,2′‐bipyridine, or 1‐(2′‐pyridyl)‐3,5‐dimethylpyrazole undergo clean and selective ligand substitution under irradiation with visible light. For instance, Ru(phen) 2 (dmbp) 2+ in CH 3 CN is quantitatively converted to Ru(phen) 2 (CH 3 CN) 2 2+ in a photochemical reaction accompanied by expulsion of the sterically hindering chelate dmbp (phen = 1,10‐phenanthroline; dmbp = 6,6′‐dimethyl‐2,2′‐bipyridine). Interestingly, 2,2′‐bipyridine was found to be photochemically ejected in one case, probably as a consequence of its greater flexibility.