A potential-controlled switch on/off mechanism for selective excitation in mixed electrochemiluminescent systems

被引：136

作者：

Doeven, Egan H. ^{[1
]}

Zammit, Elizabeth M. ^{[2
]}

Barbante, Gregory J. ^{[2
]}

Francis, Paul S. ^{[2
]}

Barnett, Neil W. ^{[2
]}

Hogan, Conor F. ^{[1
]}

机构：

[1] La Trobe Univ, La Trobe Inst Mol Sci, Dept Chem, Bundoora, Vic 3086, Australia

[2] Deakin Univ, Fac Sci & Technol, Ctr Chem & Biotechnol, Geelong, Vic 3216, Australia

来源：

CHEMICAL SCIENCE | 2013年 / 4卷 / 03期

基金：

澳大利亚研究理事会;

关键词：

CYCLOMETALATED IRIDIUM(III) COMPLEXES; EFFICIENT ELECTROGENERATED CHEMILUMINESCENCE; LIGHT PHOTOREDOX CATALYSIS; VISIBLE-LIGHT; GREEN; TRIS(2-PHENYLPYRIDINE)IRIDIUM(III); PHOSPHORESCENT;

D O I：

10.1039/c2sc21707d

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We demonstrate the complete, rapid, and reversible switching between the emissions from two electrogenerated chemiluminescence (ECL) systems contained within the same solution, controlled by simple modification of the applied potential. The fundamental bases of the approach are the ability to selectively 'switch on' luminophores at distinct oxidation potentials, and an intriguing observation that the emission from the well-known electrochemiluminescent complex, fac-Ir(ppy)(3), (where ppy is 2-phenylpyridinato), can be selectively 'switched-off' at high overpotentials. The dependence of this phenomenon on high concentrations of the co-reactant implicates quenching of the excited [Ir(ppy)(3)]* state by electron transfer. Rapid spectral scanning during modulation of the applied potential reveals well resolved maxima for mixtures comprising either green and red or green and blue luminophores, illustrating the vast potential of this approach for multiplexed ECL detection.

引用

页码：977 / 982

页数：6

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