title: Highly Sensitive Fluorescence Detection of Hg2+Based on a Water-soluble Conjugated Polymer with Carboxylate Groups.
abstract: A label-free, highly selective, and highly sensitive fluorescent sensor to detect Hg2+was developed using a water-soluble conjugated polymer with carboxylate groups (poly(2,5-bis(sodium 4-oxybutyrate)-1,4-phenylethynylene-alt-1,4-phenyleneethynylene, PPE-OBS) in this work. The fluorescence of PPE-OBS would be quenched because of the effect among the unique coordination-induced aggregation and electron transfers of PPE-OBS toward Hg2+. The linear relationship between the fluorescence intensity and concentration of Hg2+was observed within the range from 6 × 10-8to 8 × 10-5mol L-1(R2= 0.9985), and the limit of detection was 2.10 × 10-9mol L-1. The proposed method was applied to detect Hg2+in environmental water samples, and satisfactory results were obtained.
authors.affiliation: Department of Analytical Chemistry, College of Chemistry, Jilin University.
authors.forename: Hongyu
authors.initials: H
authors.lastname: Mi
authors.forename: Mingming
authors.initials: M
authors.lastname: Guan
authors.forename: Hongyan
authors.initials: H
authors.lastname: Shan
authors.forename: Qiang
authors.initials: Q
authors.lastname: Fei
authors.forename: Yanfu
authors.initials: Y
authors.lastname: Huan
authors.forename: Zhiquan
authors.initials: Z
authors.lastname: Zhang
authors.forename: Guodong
authors.initials: G
authors.lastname: Feng