Issue 20, 2013

The self-assembled Ru(bpy)3(PF6)2nanoparticle on polystyrene microfibers and its application for ECL sensing

Abstract

Ruthenium nanoparticle tris(2,2′-bipyridyl)ruthenium(II) bis(hexafluorophosphate) (Ru(bpy)3(PF6)2, RuNP) was self-assembled on polystyrene (PS) electrospun microfibers. The formation of RuNP is attributed to the sulfonated PS (SPS) microfibers' high adsorptive capability of 94% for Ru(bpy)32+, as well as the strong interaction between the Ru(bpy)32+ and ionic liquid (1-butyl-3-methylimidazolium hexafluorophosphate, BMIMPF6). The RuNP/SPS microfibers exhibited an enhanced electrochemiluminescence (ECL) emission, 2.3 times higher than that from Ru(bpy)32+/SPS microfibers and 6.6 times higher than that from Ru(bpy)32+/SPS continuous thin films. It is worthy of note that, as a result of the hydrophobic nature of the RuNP, the transfer of water-insoluble α-naphthol is accelerated, and thus the α-naphthol ECL quenching efficiency is enhanced. An ECL sensor based on the RuNP/SPS microfibers was fabricated and used to detect low concentrations of α-naphthol. The detection limit was of 1.0 nM (S/N > 3), and the linear response ranged from 0 to 18 μM. This sensor has been successfully applied to measure the α-naphthol content in pesticide carbaryl samples. Our work provides a very simple and cost-effective method to fabricate RuNP on polymer microfibers with great potential in the field of chemo/biosensors.

Graphical abstract: The self-assembled Ru(bpy)3(PF6)2 nanoparticle on polystyrene microfibers and its application for ECL sensing

Supplementary files

Article information

Article type
Paper
Submitted
11 May 2013
Accepted
30 Jul 2013
First published
31 Jul 2013

Analyst, 2013,138, 6171-6176

The self-assembled Ru(bpy)3(PF6)2 nanoparticle on polystyrene microfibers and its application for ECL sensing

J. Luo, C. Zhou, Y. Shi, L. Zhang and D. Xiao, Analyst, 2013, 138, 6171 DOI: 10.1039/C3AN00947E

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