title: Polymer nanodots of graphitic carbon nitride as effective fluorescent probes for the detection of Fe³⁺ and Cu²⁺ ions.
abstract: A simple and green route was developed for the first time to produce fluorescent graphitic carbon nitride (F-g-C₃N₄) by hydrothermal treatment of bulk g-C₃N₄. The produced F-g-C₃N₄ dots have blue emission and a high quantum yield, and were applied as a very effective fluorescent probe for label-free selective and sensitive detection of Cu(2+) and Fe(3+) ions; the limits of detection were as low as 0.5 nM and 1.0 nM, respectively. By using sodium hexametaphosphate (SHPP) as a masking agent of Fe(3+), Cu(2+) was exclusively detected in the presence of Fe(3+) ions. Cu(2+) and Fe(3+) ions in real water samples were also detected successfully. This exceptional fluorescent performance makes the probes based on F-g-C₃N₄ dots attractive for highly sensitive detection of Cu(2+) and Fe(3+) ions in real water.
authors.affiliation: School for Radiological and Interdisciplinary Sciences, Soochow University, Suzhou 215123, PR China. xkwang@ipp.ac.cn xkwang@suda.edu.cn.
authors.forename: Shouwei
authors.initials: S
authors.lastname: Zhang
authors.forename: Jiaxing
authors.initials: J
authors.lastname: Li
authors.forename: Meiyi
authors.initials: M
authors.lastname: Zeng
authors.forename: Jinzhang
authors.initials: J
authors.lastname: Xu
authors.forename: Xiangke
authors.initials: X
authors.lastname: Wang
authors.forename: Wenping
authors.initials: W
authors.lastname: Hu
mesh_terms: D003300:Copper / Q000032:analysis*; D005456:Fluorescent Dyes / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D007501:Iron / Q000032:analysis*; D043942:Nanotubes / Q000737:chemistry*; D009570:Nitriles / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods; D014867:Water / Q000032:analysis*
chemical_list: D005456:Fluorescent Dyes; D009570:Nitriles; D014867:Water; C011206:cyanogen; D006108:Graphite; D003300:Copper; D007501:Iron