A Bifunctional Chromogenic Calix [4] arene Chemosensor for Both Cations and Anions: A Potential Ca2+ and F–Switched INHIBIT Logic Gate with a YES Logic …

KC Chang, IH Su, YY Wang…

Index: Chang, Kai-Chi; Su, In-Hao; Wang, Yu-Yun; Chung, Wen-Sheng European Journal of Organic Chemistry, 2010 , # 24 p. 4700 - 4704

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Citation Number: 22

Abstract

Abstract A bifunctional chromogenic calix [4] arene 3, which contains both triazoles and hydroxy azophenols as both cationic and anionic recognition sites and the azophenol moiety as a coloration unit, was designed and synthesized. The recognition of Ca 2+ by 3 gave rise to a marked colour change from greenish to bright yellow, whereas the recognition of F–by 3 showed a colour change from light green to bluish. The colour changes of 3 by ...