A Coumarin-Based Luminescent Chemosensor for Recognition of Cu2+ and its In-Situ Complex for CN- Sensing via Cu2+ Displacement Approach

Soma Mukherjee; Shrabani Talukder

doi:10.1007/s10895-016-1974-1

A Coumarin-Based Luminescent Chemosensor for Recognition of Cu²⁺ and its In-Situ Complex for CN^- Sensing via Cu²⁺ Displacement Approach

J Fluoresc. 2017 Sep;27(5):1567-1572. doi: 10.1007/s10895-016-1974-1. Epub 2016 Nov 22.

Authors

Soma Mukherjee¹, Shrabani Talukder²

Affiliations

¹ Department of Environmental Science, University of Kalyani, Kalyani, Nadia, West Bengal, 741235, India. somam580@gmail.com.
² Department of Environmental Science, University of Kalyani, Kalyani, Nadia, West Bengal, 741235, India.

PMID: 27878520
DOI: 10.1007/s10895-016-1974-1

Abstract

A new coumarin based chemosensor has been developed for selective fluorescent recognition of Cu²⁺ in MeOH/H₂O (4:1, v/v at pH = 7.2 aqueous solution) medium with 1:1 binding stoichiometry. The in-situ prepared Cu²⁺ complex displays high selectivity towards CN^- via Cu²⁺ displacement approach with detection limit in the micro molar range. Moreover, in presence of Cu²⁺, the receptor exhibits reversible emission change with EDTA and thus offers an interesting property of molecular 'IMPLICATION' logic gate with Cu²⁺ and EDTA as chemical inputs.

Keywords: CN−; Chemosensor; Coumarin; Cu2+; Logic gate.