Highly selective and sensitive colourimetric detection of Hg 2+ ions by unsymmetrical squaraine dyes

KM Shafeekh, MKA Rahim, MC Basheer, CH Suresh…

Index: Shafeekh; Rahim; Basheer; Suresh; Das Dyes and Pigments, 2013 , vol. 96, # 3 p. 714 - 721

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Citation Number: 26

Abstract

A novel class of sulphonate group containing unsymmetrical squaraine dyes has been synthesized. These dyes show a selective and sensitive affinity towards Hg2+ in methanol and are practically insensitive to most other environmentally and biologically relevant metal ions. Isothermal titration calorimetric (ITC) studies and High Resolution Mass Spectral (HRMS) analysis indicate a 1: 1 binding mode. 1H and 13C NMR of the isolated Dye… ...