Efficient electrogenerated chemiluminescence from cyclometalated iridium(III) complexes.
Very efficient electrogenerated chemiluminescence (ECL) phenomena were realized by deliberately tuning electron-transfer reactions from electrochemically generated electron donor to metal complex radical cations. By controlling the relative positions of HOMO and LUMO levels (oxidation potential and reduction potential) of Ir(III) complexes, we could obtain 77 times higher ECL from iridium(III) complexes in the presence of TPA than that of the Ru(bpy)32+/TPA system. This high ECL efficiency of new Ir(III) complexes can be used in many interesting applications such as sensors and luminescent devices.
Kim
Jae Il
JI
School of Chemistry, Seoul National University, Seoul 151-747, South Korea.
Shin
Ik-Soo
IS
Kim
Hasuck
H
Lee
Jin-Kyu
JK