Determination of trace amount of Cu2+ with a multi-responsive colorimetric and reversible chemosensor

Yong Sheng Mi, Zhong Cao, Ya Ting Chen, Qiu Fen Xie, Ying Ying Xu, Yong Feng Luo, Jian Jian Shi, Jian Nan Xiang

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

A multi-responsive sensor 1 was constructed by combining a ferrocene unit and a rhodamine block via a carbohydrazone bond. The sensor showed high selectivity toward Cu2+ over other common metal ions in a wide pH range with excellent reversibility and rapid response. The obvious color change from colorless to pink upon the addition of Cu2+ could make it a suitable 'naked-eye' indicator for Cu2+. The detection limit (LOD) obtained was down to 2.0 nM and the association constant (Ka) was evaluated as 4.65 × 107 M-1. The accuracy for detecting Cu2+ in environmental river water was compared favorably with the traditional atomic absorption spectroscopy method (AAS). Finally, we proposed a reversible ring-opening mechanism (Off-On) of the rhodamine spirolactam induced by Cu2+ binding and a 2:1 stoichiometric structure between 1 and Cu2+.

Original languageEnglish (US)
Pages (from-to)5274-5280
Number of pages7
JournalAnalyst
Volume138
Issue number18
DOIs
StatePublished - Sep 21 2013

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy
  • Electrochemistry

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    Mi, Y. S., Cao, Z., Chen, Y. T., Xie, Q. F., Xu, Y. Y., Luo, Y. F., Shi, J. J., & Xiang, J. N. (2013). Determination of trace amount of Cu2+ with a multi-responsive colorimetric and reversible chemosensor. Analyst, 138(18), 5274-5280. https://doi.org/10.1039/c3an00741c