Novel cathodic electrochemiluminescence of tris(bipyridine) ruthenium(II) on a gold electrode in acidic solution.
Novel cathodic electrochemiluminescence of tris(bipyridine) ruthenium(II) on a gold electrode in acidic solution.
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DOI：
10.1039/c1an15862g
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发表时间：
2012-01
期刊：
影响因子：
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通讯作者：
Xiaoquan Lu;Dong Liu;Jie Du;Haifeng Wang;Zhonghua Xue;Xiuhui Liu;Xibin Zhou
中科院分区：
文献类型：
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作者：
Xiaoquan Lu;Dong Liu;Jie Du;Haifeng Wang;Zhonghua Xue;Xiuhui Liu;Xibin Zhou
首次报道了在三联吡啶钌（Ru（bpy）（3）（2+））溶液中金电极上的阴极电化学发光新现象。在0.2- 1.4V范围内连续扫描，发现Ru（bpy）（3）（2+）的阴极电化学发光主要发生在0.4- 0.8V，在0.68V附近观察到电化学发光峰。本课题组推测Ru（bpy）（3）（2+）可能在酸性磷酸盐缓冲溶液（PBS）中与金电极反应产生发光。根据实验结果，讨论了可能的电致发光机理。此外，研究还表明，Au作为Ru-体系中的共反应物对整个电致发光的贡献占主导地位。因此，Ru（bpy）（3）（2+）与新生成的Au之间的反应意味着惰性金属Au可能成为一种有前途的电致发光材料。
The novel phenomenon of cathodic electrochemiluminescence on a gold electrode in tris(bipyridine) ruthenium(II) (Ru(bpy)(3)(2+)) solution is described for the first time. A cathodic electrochemiluminescence (ECL) was found to mainly occur at 0.4-0.8 V with continuous potential scanning from 0.2-1.4 V and the ECL peak was observed around 0.68 V, which was quite different from generally reported Ru(bpy)(3)(2+) ECL. Our group speculated that Ru(bpy)(3)(2+) possibly reacts with the gold electrode in the acidic phosphate buffer solution (PBS) to generate luminescence. The possible ECL mechanism was discussed according to the presented results. Moreover, it is revealed that the Au as co-reactant in the Ru-system contributed dominantly to the whole ECL. Therefore, the reaction between Ru(bpy)(3)(2+) and the newly formed Au implied that the inert metal Au could become a promising material for ECL investigations.