Département de chimie moléculaire

Thin films of poly[Ru(L)(CO)2Cl2] complexes (L = 4-(2-pyrrol-1-ylethyl)-4'-methyl-2,2'-bipyridine (L1) or 4,4'-bis((3-pyrrol-1-ylpropyloxy)carbonyl)-2,2'-bipyridine (L2)) were prepd. by anodic electropolymn. of the corresponding monomeric complexes on Pt and ITO electrodes. The electrochem. and spectroelectrochem. properties of these films were investigated in CH3CN. Photolysis at 366 nm of the films immersed in CH3CN leads to successive photosubstitutions of the two CO ligands and of the one Cl- ligand by CH3CN for the complex with L = L1, while only the first two photosubstitutions occur for L = L2. On the basis of the photochem. (mono-CH3CN photosubstitutions essentially), images can be created in the films by using masking techniques. In a subsequent step, the unphotolyzed area can be removed from the electrode surface by electrolysis. This procedure left a spacially controlled image of the original mask as a film of poly[Ru(L)(CO)(CH3CN)Cl2]. [on SciFinder(R)]