Effective immobilization of Ru(bpy)(3)(2+) by functional composite phosphomolybdic acid anion on an electrode surface for solid-state electrochemiluminescene to sensitive determination of NADH

文献类型： 外文期刊

第一作者： Li, Yali

作者： Li, Yali;Yang, Xiurong;Yang, Fan;Li, Yali;Wang, Yingping;Zheng, Peihua;Liu, Xiaoxu;Wang, Yingping

作者机构：

关键词： Electrocatalytic oxidation;Hybrid nanocomposites;NADH;Polyoxometalates;Self-assembly;Solid-state electrochemiluminescence

期刊名称：ELECTROCHIMICA ACTA （ 影响因子：6.901； 五年影响因子：6.016 ）

ISSN： 0013-4686

年卷期： 2012 年 66 卷

页码：

收录情况： SCI

摘要： Phosphomolybdic acid anion ([PMo12O40](3-)) was used for the immobilization of ruthenium(II) tris(bipyridine) (Ru(bpy)(3)(2+)) on an electrode surface to yield a sensitive solid-state electrogenerated chemiluminescence (ECL) sensor. [PMo12O40](3-) anion in the prepared sensor had catalytic ability to the NADH oxidation. The ECL signal of the Ru(bpy)(3)(2+)/[PMo12O40](3-) film was about 3-fold enhancement than that for the Ru(bpy)(3)(2+)/Nafion film to NADH determination. The resulting ECL sensor exhibited a wide linear range from 2.5 x 10(-7) to 5.0 x 10(-3) M (R = 0.99) with the detection limit of 1.67 x 10(-8) M (S/N = 3). In addition, it had good reproducibility and excellent long-term stability, and the relative average deviation was 0.77% of ECL intensity-time curve under continuous potential scanning for 21 cycles: after being used in two weeks, the sensor was able to keep over 90% activity toward 25 mu M NADH. Fabrication of the ECL sensor by this method is simple and easy. Such superior properties will promote the application of polyoxometalates in fabricating sensors for using in electroanalytical and biochemical analysis. (C) 2012 Elsevier Ltd. All rights reserved.

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