Facile Fabrication of Solid‐state Electrochemiluminescence Sensor via Non‐covalent π‐π Stacking and Covalent Bonding on Graphite Electrode |
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| Authors: | Yuanhong Xu Mengli Liu Fushuang Niu Jingquan Liu |
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| Affiliation: | 1. College of Chemical Science and Engineering, Laboratory of Fiber Materials and Modern Textile the Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071, ChinaJianmei Wang and Yuanhong Xu contributed equally to this work.;2. College of Chemical Science and Engineering, Laboratory of Fiber Materials and Modern Textile the Growing Base for State Key Laboratory, Qingdao University, Qingdao 266071, China |
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| Abstract: | Herein, a facile and efficient method was developed for fabrication of solid‐state electrochemiluminescence (ECL) sensor via non‐covalent π‐π stacking and covalent bonding on the graphite electrode (GE) surface. The electrode was firstly modified with 1‐aminopyrene via π‐π stacking between GE surface and the pyrene moiety. Thereafter a stable and efficient solid‐state ECL sensor was fabricated by covalent immobilization of ruthenium(II) onto the GE surface via amidation reaction between the 1‐aminopyrene and bis(2,2′‐bipyridyl)(4‐methyl‐4′‐carboxypropyl‐2,2′‐bipyridyl) ruthenium(II) bishexafluorophosphate. The sensor has been investigated using tripropylamine and tetracycline as representative analytes, and low detection limits of 0.7 nM and 3.5 nM (S/N=3) were reached, respectively. |
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| Keywords: | graphite electrode solid‐state electrochemiluminescence sensor π ‐π stacking |
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