title: A solid-state electrochemiluminescence sensing platform for detection of catechol based on novel luminescent composite nanofibers.
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.
authors.affiliation: Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China. wxy@seu.edu.cn
authors.forename: Xiaoying
authors.initials: X
authors.lastname: Wang
authors.forename: Xiaobing
authors.initials: X
authors.lastname: Wang
authors.forename: Sumeng
authors.initials: S
authors.lastname: Gao
authors.forename: Yi
authors.initials: Y
authors.lastname: Zheng
authors.forename: Meng
authors.initials: M
authors.lastname: Tang
authors.forename: Baoan
authors.initials: B
authors.lastname: Chen
mesh_terms: D015082:2,2'-Dipyridyl / Q000031:analogs & derivatives* / Q000737:chemistry; D002138:Calibration; D002209:Caprolactam / Q000031:analogs & derivatives* / Q000737:chemistry; D002396:Catechols / Q000032:analysis*; D056831:Coordination Complexes; D055664:Electrochemical Techniques / Q000379:methods; D057230:Limit of Detection; D049408:Luminescent Agents / Q000737:chemistry*; D008163:Luminescent Measurements / Q000379:methods*; D057139:Nanofibers / Q000737:chemistry* / Q000648:ultrastructure; D037742:Nanotubes, Carbon / Q000737:chemistry / Q000648:ultrastructure; D011108:Polymers / Q000737:chemistry*; D017975:Ruthenium Compounds
chemical_list: D015082:2,2'-Dipyridyl; D002209:Caprolactam; D002396:Catechols; D056831:Coordination Complexes; D049408:Luminescent Agents; D037742:Nanotubes, Carbon; D011108:Polymers; C547232:tris(2,2-bipyridine)-ruthenium(II); D017975:Ruthenium Compounds; C009916:nylon 6; C034221:catechol