A Fluorescent Probe for Al3+ Based on Calix[4]arene Containing Salicylaldehyde-Derived Schiff Base |
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Authors: | Zuquan Wang Yunjian Li Dr Jing Shi Prof Dr Xiaoqiang Sun Prof Dr Tangxin Xiao Prof Dr Ke Yang Prof Dr Zheng-Yi Li |
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Institution: | Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, 213164 P. R. China |
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Abstract: | Two novel fluorescent probes L1 and L2 for recognizing Al3+ have been prepared by cooperating salicylaldehyde-derived Schiff base groups onto the upper rim of the calix4]arene. Of these probes, L2 is the most effective at recognizing Al3+, displaying a highly selective fluorescence “on” response with an emission wavelength at 478 nm and a Stokes shift of 88 nm. Additionally, probe L2 can form a 1 : 1 coordination complex with Al3+ with a binding constant of 2.6×1010 M−1. Furthermore, its fluorescence intensity exhibits a good linear relationship with Al3+ concentration within the range of 2.0×10−5 M to 1.4×10−4 M, and the probe has a low detection limit of 4.36×10−7 M. |
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Keywords: | aluminum ion calix[4]arene fluorescent probe Schiff-base |
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