Efficient Electrogenerated Chemiluminescence from Cyclometalated Iridium(lll)Complexes

摘要

Electrogenerated chemiluminescence(ECL)is a well-known method for generating light;electrochemically generated radical ions undergo a homogeneous electron transfer to produce the excited state that releases the excited energy as light.ECL has long been of interest because it provides a simple light production mechanism for various applications and some insight into the light-emitting mechanisms.Among the various materials investigated for ECL study,an important branch is metal complexes due to their thermal and photochemical stability and high photoluminescence(PL)efficiency,and most of the ECL studies on metal complexes have focused on tris(2,2'-bipyridine)ruthenium(II)(Ru(bpy)_3~(2+)).ECL of Ru(bpy)_3~(2+)has also attracted much attention as a sensitive and selective detection method in analytical chemistry.