Efficient electrochemiluminescent cyclometalated iridium(III) complexes: Synthesis, photophysical and electrochemiluminescent properties
关键字：Cyclometalated Ir complex; Electrochemiluminescence(ECL); Synthesis
摘要：A series of new cyclometalated iridium(III) complexes for electrochemiluminescence (ECL) system were synthesized and fully characterized. Using tri-n-propylamine (TPA) as an oxidative-reductive co-reactant, their ECL properties were studied in acetonitrile (CH(3)CN) and mixed CH(3)CN/H(2)O (50:50, v/v) solutions, respectively. Meanwhile, the influencing factors of ECL efficiencies, including working electrode, pH, and surfactant were investigated. A remarkable ECL enhancement (up to about 13.5 times), in comparison with the commonly used Ru(bpy)(3)(2+) (2,2'-bipyridyl) ruthenium(II), is observed from Ir(FPP)(2)(acac) (where FPP is 2-(4-fluorophenyl)-4-phenylpyridine, acac acetylacetone) at Pt disk electrode. At the same time, an increase in ECL efficiency is also observed in surfactant media. This study provided a new method for further improving and tuning the ECL efficiency by designing new iridium complexes with the appropriate cyclometalated or ancillary ligands. (C) 2011 Elsevier B.V. All rights reserved.
卷号：696
期号：11-12
是否译文：否
