A bifunctional rhodamine derivative as chemosensor for recognizing Cu2+ and Hg2+ ions via different spectra

Kaijie Wang, Qing Kong, Xiaoqiang Chen, Juyoung Yoon, K. M.K. Swamy, Fang Wang

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

A new simple bifunctional chemosensor 1 based on rhodamine was synthesized by hydrazide and formylformic acid, which could detect Cu2+ and Hg2+ via different detecting methods in CH3CN-HEPES buffer solution (20 mmol/L, pH 7.4) (1:9, v/v) respectively. When sensor 1 bound with Cu2+, it showed a colorimetric change, while a selective enhancement in fluorescence occurred upon 1 binding with Hg2+, resulting from the spirolatam-ring opening process. The binding modes of 1 with Cu2+ and Hg2+ were investigated based on UV, fluorescence change, ESI-Mass and Job's Plot data. Moreover, sensor 1 could selectively detect target ion in a mixed solution of Cu2+ and Hg2+, and the two metal ions do not interfere with each other in the process of detecting Cu2+ or Hg2+ with 1.

Original languageEnglish
Pages (from-to)1087-1090
Number of pages4
JournalChinese Chemical Letters
Volume31
Issue number5
DOIs
StatePublished - May 2020

Keywords

  • Colorimetric sensor
  • Copper
  • Fluorescent sensor
  • Mercury
  • Rhodamine
  • Spirolatam-ring opening

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