Highly selective fluorescent sensing of Cu ion by an arylisoxazole modified calix[4]arene |
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Authors: | Kai-Chi Chang |
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Institution: | Department of Applied Chemistry, National Chiao-Tung University, Hsinchu 30050, Taiwan, ROC |
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Abstract: | A novel fluorescent chemosensor 1 with two anthraceneisoxazolymethyl groups at the lower rim of calix4]arene has been synthesized, which revealed a dual emission (monomer and excimer) when excited at 375 nm. This chemosensor displayed a selective fluorescence quenching only with Cu2+ ion over all other metal ions examined. When Cu2+ ion was bound to 1, the fluorescence intensities of both monomer and excimer were quenched. Furthermore, the association constant for the 1:1 complex of 1·Cu2+ was determined to be (1.58 ± 0.03) × 104 M−1. |
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