Immobilization of tris(1,10-phenanthroline)ruthenium with graphene oxide for electrochemiluminescent analysis

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• 作者：Yali Yuan^a ; ^b ; Haijuan Li^a ; ^b ; Shuang Han^a ; ^b ; Lianzhe Hu^a ; ^b ; Saima Parveen^a ; ^b ; ^c ; Haoran Cai^a ; Guobao Xu^a ; ^{guobaoxu@ciac.jl.cn}
• 关键词：Tris(1 ; 10-phenanthroline)ruthenium ; Electrochemiluminescence ; Graphene oxide ; Tris(bipyridyl) ruthenium ; Tripropylamine
• 刊名：Analytica Chimica Acta
• 出版年：2012
• 期刊代码：2_00032670
• 类别：ch
• 出版时间：30 March, 2012
• 卷：720
• 期：Complete
• 页码：38-42
• 文件大小：631 K

摘要

Electrochemiluminescence (ECL) of ruthenium complexes has broad applications and the immobilization of Ru(bpy)₃²⁺ has received extensive attention. In comparison with Ru(bpy)₃²⁺, Ru(phen)₃²⁺ can be immobilized more easily because of its better adsorbability. In this study, immobilization of Ru(phen)₃²⁺ for ECL analysis has been demonstrated for the first time by using graphene oxide (GO) as an immobilization matrix. The immobilization of Ru(phen)₃²⁺ is achieved easily by mixing Ru(phen)₃²⁺ with GO without using any ion exchange polymer or covalent method. The strong binding of Ru(phen)₃²⁺ with GO is attributed to both the 蟺-蟺 stacking interaction and the electrostatic interaction. The Ru(phen)₃²⁺/GO modified electrode was characterized by using tripropylamine (TPA) as the coreactant. The linear range of TPA is from 3 脳 10^鈭? to 3 脳 10^鈭? mol L^鈭? with the detection limit of 3 脳 10^鈭? mol L^鈭?. The ECL sensor demonstrates outstanding long-term stability. After the storage in the ambient environment for 90 days, the ECL response remains comparable with its original signal.