Electronic Energy Transfer in a Supramolecular Species Containing the [Ru(bpy)3]2+, [Os(bpy)3]2+, and Anthracene Chromophoric Units

A very efficient and fast energy transfer (k = 4.7 × 108 s−1) is observed from the Ru- to the Os-based moiety in 1. In the presence of oxygen a photoreaction occurs that leads to a strong decrease (about 80 times) in the rate of the energy transfer process. R  CH2C6H5, bpy = 2,2′-bipyridine.