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Paper

Chem. Commun., 2000, 1935 - 1936, DOI: 10.1039/b004982o

A photochromic system based on photochemical or thermal chelate exchange on Ru(phen)2L2+ (L = diimine or dinitrile ligand)

Etienne Baranoff, Jean-Paul Collin, Yoshio Furusho, Anne-Chantal Laemmel and Jean-Pierre Sauvage

In the presence of a bidentate chelate containing two convergent nitrile groups, Ru(phen)2L2+ (L = sterically hindering aromatic diimine ligand; phen = 1,10-phenanthroline) undergoes a photochemical reaction leading to quantitative replacement of the diimine by the bis-nitrile ligand; the reverse reaction takes place upon heating, also quantitatively.