Vapor switching of the luminescence mechanism in a Re(V) complex.

A Re^V complex demonstrates methanol selective luminescent color changes from red to green together with enhancements of the corresponding luminescence quantum yields twenty-three times. These characteristic responses are caused by the switching of the characters of the emissive states from metal-to-ligand charge transfer to d–d transition along with a single-crystal-to-single-crystal ligand exchange reaction. [ABSTRACT FROM AUTHOR]