Design and synthesis of a terbium(III) complex-based luminescence probe for time-gated luminescence detection of mercury(II) ions

Guanfeng Cui, Zhiqiang Ye*, Run Zhang, Guilan Wang, Jingli Yuan

*Corresponding author for this work

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Time-gated luminescence detection technique using lanthanide complexes as luminescent probes is a useful and highly sensitive method. However, the effective application of this technique is limited by the lack of the target-responsive luminescent lanthanide complexes that can specifically recognize various analytes in aqueous solutions. In this work, a dual-functional ligand that can form a stable complex with Tb 3+ and specifically recognize Hg 2+ ions in aqueous solutions, N,N,N1,N1-{[2,6- bis(3′-aminomethyl-1′-pyrazolyl)-4-[N,N-bis(3″, 6″-dithiaoctyl)-aminomethyl]- pyridine]} tetrakis(acetic acid) (BBAPTA), has been designed and synthesized. The luminescence of its Tb 3+ complex is weak, but can be effectively enhanced upon reaction with Hg 2+ ions in aqueous solutions. The luminescence response investigations of BBAPTA-Tb 3+ to various metal ions indicate that the complex has a good luminescence sensing selectivity for Hg 2+ ions, but not for other metal ions. Thus a highly sensitive time-gated luminescence detection method for Hg 2+ ions was developed by using BBAPTA-Tb 3+ as a luminescent probe. The dosedependent luminescence enhancement of the probe shows a good linearity with a detection limit of 17 nM for Hg 2+ ions. These results demonstrated the efficacy and advantages of the new Tb 3+ complex-based luminescence probe for the sensitive and selective detection of Hg 2+ ions.

Original languageEnglish
Pages (from-to)261-267
Number of pages7
JournalJournal of Fluorescence
Volume22
Issue number1
DOIs
Publication statusPublished - Jan 2012

Keywords

  • Luminescent probe
  • Mercury ions
  • Terbium complex
  • Time-gated luminescence detection

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