A selective, fluorescent probe for Hg2+ detection in aqueous solution

De X. Zeng, Yi Chen

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


A novel fluorescent probe, 5-(2-benzothzaole)-2-thiophene boronic acid (1), for Hg2+ detection in aqueous solution was synthesized. (1) exhibited very strong fluorescence emission (φ{symbol} = 0.92) in tris-HCl (pH 7.42) buffer aqueous solution. It was found that the fluorescence emission of (1) was quenched significantly upon addition of Hg2+ in buffer aqueous solution, whereas no marked fluorescence quenching was detected with addition of other metal ions (Ba2+, Ca2+, Cd2+, Co2+, Cu2+, Mg2+, Fe2+, Fe3+, Ni2+, Pb2+, Zn2+, Na+, K+) expect for Fe2+ and Fe3+, for which a small fluorescence quenching was detected in same condition. Competition experiment showed that no obvious interference was observed in its fluorescence while (1) performed the titration with Hg2+ in the different mixtures of metal ions.

Original languageEnglish (US)
Pages (from-to)121-124
Number of pages4
JournalJournal of Photochemistry and Photobiology A: Chemistry
Issue number2-3
StatePublished - Feb 25 2007
Externally publishedYes


  • Aqueous solution
  • Fluorescent probe
  • Hg detection

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Physics and Astronomy(all)


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