Induced distant cotton effects in an aromatic chromophore in mixed aminoacides of copper(II)

Abstract

Chiral amino acids bonded to copper(II) induce Cotton effects in the visible and UV regions corresponding tod-d and charge transfer transitions [1,2] but and induced Cotton effect on a distant ligand has not been observed to date. We have now observed such an effect effect with mixed complexes of copper(II) with L- and D-proline (pro) and 2,2'-dipyridyl (dip) or 1,10-phenanthroline (phen), 1 and 2, respectively, in the UV region (Fig.1).