Photoswitchable trinuclear transition-metal complexes. Intramolecular triplet–triplet energy transfer from fac-(diimine)ReI(CO)3 chromophores to a stilbene-like bridging ligandSpectral and analytical data for 1, 3, 5, 6 and 7 are available from the RSC web site, see http://www.rsc.org/suppdata/cc/a9/a908074k/

Abstract

A series of novel trinuclear metal complexes containing fac-(diimine)Re^I(CO)₃ chromophores and a stilbene-like bridging ligand have been synthesized and in CH₃CN exhibit photoswitchable luminescence arising from photoinduced intramolecular energy transfer from the fac-(diimine)- Re(CO)₃ chromophores to the bridging ligand.