The Design of a Highly Selective Fluorescent Chemosensor for Cu(II) within Wide pH Region and a Molecular Switch Controlled by pH |
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Authors: | Jun-Min Liu Qi-Yu Zheng Chuan-Feng Chen Zhi-Tang Huang |
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Institution: | (1) Laboratory of Chemical Biology, Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100080, China |
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Abstract: | A new calix4]arene-based fluorescent compound with two thio-ether groups as ionophore and one 3-alkoxy-2-naphthoic acid moiety as fluorophore has been designed, which exhibited highly selective binding of Cu 2+ over alkali, alkaline earth and some transition metal ions, including Co 2+, Ni 2+, Zn 2+, Mn 2+, Cd 2+, Pb 2+, Hg 2+, Ag +, Cu +, in CH 3OH–H 2O (2:1) within wide pH region. Moreover, the change of pH induces the consecutive quenching/revival of the fluorescence, with a concomitant distinct difference of the fluorescence quantum yield. In consequence, this system could be considered as a molecular switch. |
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Keywords: | calixarene copper design fluorescent chemosensor molecular switch |
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