A Colorimetric Ditopic Receptor Modulated by Fluoride Anion and Sodium Cation Binding

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Contents Vol 59(11)

doi:10.1071/CH06265

A Colorimetric Ditopic Receptor Modulated by Fluoride Anion and Sodium Cation Binding

Yao-Pin Yen ^A ^B, Chia-Lan Chen ^A, Tung-Ming Fu ^A, Chen-Yu Wu ^A, Chi-Yung Lin ^A

^A Department of Applied Chemistry, Providence University, Taiwan ROC.
^B Corresponding author. Email: ypyen@pu.edu.tw





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Australian Journal of Chemistry 59(11) 805–811 http://dx.doi.org/10.1071/CH06265
Submitted: 27 July 2006 Accepted: 9 October 2006 Published online: 17 November 2006

Abstract

A new colorimetric ditopic receptor (1) was synthesized and characterized. Upon investigation of a series of anions, the appearance of the solution of receptor 1 with F^– showed a colour change from light-yellowish to orange-red which can be detected by the naked eye. Upon subsequent addition of Na⁺ or Li⁺ to the solution, the orange-red colour was no longer observable. The remarkable colour switching (ON and OFF) is thus controlled by the anion and cation recognition.