期刊
JOURNAL OF ORGANOMETALLIC CHEMISTRY
卷 696, 期 11-12, 页码 2445-2450出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jorganchem.2011.03.015
关键词
Cyclometalated Ir complex; Electrochemiluminescence(ECL); Synthesis
资金
- Natural Science Foundation of China [21075073, 20971076]
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 (CH3CN) and mixed CH3CN/H2O (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.
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