Solvent-dependent chromogenic sensing for Cu2+and fluorogenic sensing for Zn2+and Al3+: A multifunctional chemosensor with dual-mode

Gyeong Jin Park, Dae Yul Park, Kyung Min Park, Youngmee Kim, Sung Jin Kim, Pahn Shick Chang, Cheal Kim

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

A new multifunctional chemosensor 1 was synthesized and characterized by spectroscopic tools along with a single crystal X-ray crystallography. It can exhibit selective recognition responses toward Cu2+, Zn2+and Al3+in different solvent systems with bimodal methods (colorimetric and fluorescence). This sensor 1 detected Cu2+ions through a distinct color change from colorless to yellow in aqueous solution. Interestingly, the receptor 1 was found to be reversible by EDTA. The detection limit (11 μM) of 1 for Cu2+is much lower than WHO guideline (30 μM) in drinking water. In addition, the sensor 1 showed significant fluorescence enhancements in the presence of Zn2+ion and Al3+ion in two different organic solvents (DMF and MeCN), respectively. The binding modes of the three complexes were determined to be a 1:1 complexation stoichiometry through Job plot, ESI-mass spectrometry analysis, and 1H NMR titration.

Original languageEnglish
Pages (from-to)7429-7438
Number of pages10
JournalTetrahedron
Volume70
Issue number41
DOIs
StatePublished - 14 Oct 2014

Keywords

  • Aluminum ion
  • Colorimetric
  • Copper ion
  • Fluorescent
  • Reversible
  • Zinc ion

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