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

Abstract

The solid compound Cu 2(CF 3SO 3) 2(C 6H 6) shows an intense emission at λ max =518 nm ( φ∼10 −2, τ=0.5 μs ) which is suggested to originate from a Cu I to benzene metal-to-ligand charge transfer (MLCT) triplet. The spin-allowed MLCT transition gives rise to an excitation maximum at λ=318 nm which appears also as long-wavelength band at λ max =315 nm in the absorption spectrum of the complex in solution.