Electrochemically generated chemiluminescence of tris (2,2 '-bipyridine) ruthenium(II), tris(1,10-phenathroline)ruthenium(II) and tris(4,7-diphenyl-1,10-phenanthroline)ruthenium(II) complexes

摘要

The electrochemically generated chemiluminescence (ECL) of the title complexes with four series of electroactive organic compounds Q in 0.1 M (C2H5)(4)NPF6 acetonitrile solutions has been studied using a triple-potential-step technique. The yields of the formation of the excited *RuL32+ ion produced by the electron transfer reaction of RuL3+ with aromatic amine or 2,3,7,8-tetramehoxythianthrene radical cations and by the reaction of RuL33+ with quinone or nitroaromatic radical anions as well as with N-methylpyridinium radicals have been determined. A reaction scheme describing generation of the excited *RuL32+ has been comparatively discussed with that for the quenching reactions with conclusion that spin conversion between two spin forms (3)[RuL33+/+...Q(-/+)] and (1)[RuL33+/+...Q(-/+)] of an activated complex play a crucial role in both electron transfer processes. [References: 50]