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A solid-state electrochemiluminescence sensing platform for detection of catechol based on novel luminescent
Xiaoying Wang1, Xiaobing Wang, Sumeng Gao
1Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China. wxy@seu.edu.cn
Abstract:
A solid-state electrochemiluminescence (ECL) sensing platform based on the novel luminescent composite nanofibers for detection of catechol has been developed. The carboxylated multi-walled carbon nanotubes (MWNTs) and ruthenium(II) tris-(bipyridine) (Ru(bpy)3(2+)) doped nylon 6 (PA6) luminescent composite nanofibers (Ru-MWNTs-PA6) were successfully fabricated by a one-step electrospinning technique. The Ru-MWNTs-PA6 nanofibers, with unique 3D nanostructure, large specific surface area and a larger amount of immobilized-Ru(bpy)3(2+), maintained the photoelectric properties of the Ru(bpy)3(2+) ions and exhibited excellent ECL behaviors on glassy carbon (GC) electrode. As a solid-state ECL sensing platform, the Ru-MWNTs-PA6 nanofibers can sensitively detect low concentration catechol by monitoring the phenol-dependent ECL intensity change. The detection limit for catechol is 1.0 nM, which is comparable or better than that in the reported assays. The solid-state ECL sensor displayed wide linear range, high sensitivity and good stability. It holds promise for the electrospun nanofibers-based ECL sensors have a great potential for routine analyses.
