Photoinduced inter-cavity electron transfer between Ru(II)tris(2,2′-bipyridne) and Co(II) tris(2,2′-bipyridine) Co-encapsulated within a Zn(II)-trimesic acid metal organic framework

Photoexcitation of a Zn(II)-trimesic acid based metal organic framework containing co-encapsulated Ru(II) tris(2,2'-bipyridine) (RuBpy) and Co(II) tris(2,2'-bipyridine) (CoBpy) results in inter-molecular electron transfer (ET) between the excited state of RuBpy ((MLCT)-M-3) and the ground state CoBpy The rate of inter-cavity ET, k(ET), is found to be 3.7 x 10(6) s(-1). Using the semi-classical Marcus equation and the observed rate constant, it is determined that ET occurs between RuBpy and CoBpy complexes located in adjacent cavities (similar to 19.6 angstrom).