Chemical Research in Chinese Universities ›› 2019, Vol. 35 ›› Issue (6): 967-971.doi: 10.1007/s40242-019-9246-7

• Articles • Previous Articles     Next Articles

A Sensitive Fluorescent Turn-on Probe NapP-deap Based on Naphthalimide Derivative to Detect Hg(II) Ions in HEPES Buffer Solution and Living Cells

WANG Shuxin1, CAO Jian1, CHENG Yuxiao2, LU Chenhong1   

  1. 1. School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, P. R. China;
    2. Technical Center for Industrial Product and Raw Material Inspection and Testing, Shanghai Customs, Shanghai 200135, P. R. China
  • Received:2019-09-11 Revised:2019-10-20 Online:2019-12-01 Published:2019-11-29
  • Contact: CAO Jian, LU Chenhong E-mail:caoj@sues.edu.cn;luchenhong25@foxmail.com
  • Supported by:
    Supported by the National Key Research and Development Program of China(No.2016YFF0203704), the Innovation Fund for Graduate Students of Shanghai University of Engineering Science, China(Nos.18KY0416, 16KY0410) and the National Natural Science Foundation of China(No.21404068).

Abstract: A highly sensitive fluorescent "turn-on" probe NapP-deap based on naphthalimide derivative was deve-loped that bound Hg2+ ions rapidly in the N-2-hydroxyethylpiperazine-N-ethane-sulphonic acid(HEPES) buffer solution via photo-induced electron transfer(PET) being inhibited mechanism. The titration experiment displayed that the emission intensity of NapP-deap at 540 nm was almost linearly increased by about 3-fold. The Job's plot showed a stoichiometry factor of 1:1 of the ligand-to-metal ratio. The detection limit of fluorescent probe was calculated to be 6.2×10-9 mol/L. 1H NMR studies could confirm that one Hg2+ ion was bound by the N atoms(a, b) of piperazine or the N atom(c) of pyridine. The fluorescent probe could be used for the detection of Hg2+ ions in living cells.

Key words: Fluorescent “turn-on”, Hg2+, HEPES buffer solution, Living cell, PET mechanism