Electronic Energy Transfer Across Ethynyl‐Bridged Ru^II/Os^II Terpyridyl Complexes

Abstract

The rate of intramolecular triplet energy transfer upon excitation of the RuII unit in the binuclear complex 1 decreases by roughly a third when the alkyne spacer is extended by a second ethynyl group (complex 2). The metal—metal distance increases by 2.4 Å, and correspondingly the attenuation factor for electron exchange through the CC bonds is 0.17 Å−1. Counterion PF.