Heterocyclic ring based colorimetric and fluorescent chemosensor for transition metal ions in an aqueous medium

Duraisamy Udhayakumari, Sivan Velmathi*, Maria Susai Boobalan, Parthiban Venkatesan, Shu-Pao Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

Heterocyclic ring based R1-R3 have been synthesized from the simple condensation method. R1-R3 exhibit highly selective and sensitive recognition towards transition metal ions in an aqueous medium via visual color change and were further confirmed by UV-vis and fluorescent spectroscopic methods. Fluorescent turn on and turn off behavior was observed for receptors tested with transition metal ions. The interaction of transition metal ions and receptors R1-R3 was confirmed to adopt 1:1 binding stoichiometry. Micromolar detection limit was found for R1-R3 with metal ions. DFT theoretical calculations were employed to understand the sensing mechanism of the sensors towards the metal ions. R1 and R2 were also successfully demonstrated as a fluorescent probe for detecting Cu 2+ ions in living cells.

Original languageEnglish
Pages (from-to)484-492
Number of pages9
JournalJournal of Luminescence
Volume158
DOIs
StatePublished - 1 Jan 2015

Keywords

  • Bioimaging
  • Colorimetric titration
  • Fluorescence spectroscopy
  • Micromolar
  • UV-vis

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