| One-step immobilization of Ru(bpy)(3)(2+) in a silica matrix for the construction of a solid-state electrochemiluminescent sensor with high performance. | |
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MedLine Citation:
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PMID: 23014294 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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An electrochemically induced sol-gel process has been used to efficiently immobilize Ru(bpy)(3)(2+) in a 3D porous silica film matrix deposited on a glassy carbon electrode (GCE), forming a solid state electro-chemiluminescence (ECL) sensor. In this approach, electrolysis of the GCE at cathodic voltages from a solution of ammonium fluorosilicate containing Ru(bpy)(3)(2+) results in the reduction of water to hydroxyl ions and hydrogen bubbles. The former product catalyzes the hydrolysis of ammonium fluorosilicate to form a silica film; while the hydrogen bubbles act as a dynamic template in forming a porous silica matrix. Therefore, a large quantity of Ru(bpy)(3)(2+) ions can be efficiently encapsulated in the porous silica matrix, and the formed porous structure offers a good mass transport path. The fabricated [Ru(bpy)(3)](2+) solid-state ECL sensor shows high sensitivity and stability towards the determination of tripropylamine (TPA). The electrochemically generated luminescence signal shows a good linear relationship to TPA concentration ranging from 3.46 × 10(-10) to 3.70 × 10(-6) M and 3.70 × 10(-6) to 3.60 × 10(-4) M, with an extremely low detection limit of 17 pM (S/N = 3). The present approach is effective for encapsulation of various molecules and could find wide application in the construction of various sensors. |
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Authors:
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Jing Li; Fang-Nan Xiao; Xing-Hua Xia |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-9-27 |
Journal Detail:
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Title: The Analyst Volume: - ISSN: 1364-5528 ISO Abbreviation: Analyst Publication Date: 2012 Sep |
Date Detail:
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Created Date: 2012-9-27 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0372652 Medline TA: Analyst Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China. xhxia@nju.edu.cn. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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