Excited state properties of a copper(I) benzene complex. Emission from a metal-to-ligand charge transfer state

Abstract

The solid compound Cu-2(CF3SO3)(2)(C6H6) shows an intense emission at lambda(max) = 518 nm (phi similar to 10(-2), tau = 0.5 mus) which is suggested to originate from a Cu-1 to benzene metal-to-ligand charge transfer (MLCT) triplet. The spin-allowed MLCT transition gives rise to an excitation maximum at lambda = 318 nm which appears also as long-wavelength band at lambda(max) = 315 nm in the absorption spectrum of the complex in solution. (C) 2002 Elsevier Science B.V. All rights reserved.