title: Immobilization of tris(1,10-phenanthroline)ruthenium with graphene oxide for electrochemiluminescent analysis.
abstract: Electrochemiluminescence (ECL) of ruthenium complexes has broad applications and the immobilization of Ru(bpy)(3)(2+) has received extensive attention. In comparison with Ru(bpy)(3)(2+), Ru(phen)(3)(2+) can be immobilized more easily because of its better adsorbability. In this study, immobilization of Ru(phen)(3)(2+) for ECL analysis has been demonstrated for the first time by using graphene oxide (GO) as an immobilization matrix. The immobilization of Ru(phen)(3)(2+) is achieved easily by mixing Ru(phen)(3)(2+) with GO without using any ion exchange polymer or covalent method. The strong binding of Ru(phen)(3)(2+) with GO is attributed to both the π-π stacking interaction and the electrostatic interaction. The Ru(phen)(3)(2+)/GO modified electrode was characterized by using tripropylamine (TPA) as the coreactant. The linear range of TPA is from 3×10(-7) to 3×10(-2) mol L(-1) with the detection limit of 3×10(-7) mol L(-1). 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.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China.
authors.forename: Yali
authors.initials: Y
authors.lastname: Yuan
authors.forename: Haijuan
authors.initials: H
authors.lastname: Li
authors.forename: Shuang
authors.initials: S
authors.lastname: Han
authors.forename: Lianzhe
authors.initials: L
authors.lastname: Hu
authors.forename: Saima
authors.initials: S
authors.lastname: Parveen
authors.forename: Haoran
authors.initials: H
authors.lastname: Cai
authors.forename: Guobao
authors.initials: G
authors.lastname: Xu