Abstract
To develop an effective fluorescent chemosensor for relay recognition of Zn2+ and oxalate, a new fluorescent sensor based on binaphthol-quinoline Schiff base L 1 was designed and synthesized. In DMSO-H2O (1/1, v/v, HEPES 10 mM, pH = 7.4) solution, L 1 exhibits highly selective fluorescence turn on response to Zn2+ over other metal ions. The Zn2+ recognition event is barely interfered by other coexisting metal ions except Cu 2+, Co 2+ and Ni 2+. The in situ generated L 1 -Zn\(^{\mathrm {2+}}_{\mathrm {}}\)complex was further used as a chemosensing ensemble for oxalate detection. The complex L 1 -Zn2+ displays high selectivity to oxalate with significant fluorescence quenching through Zn2+ ion displacement approach. In addition, application of L 1 for imaging of Zn2+ and oxalate in living HeLa cells was also examined.
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We are grateful to the National Natural Science Foundation of China (No. 21176029, 21476029), Liaoning BaiQianWan Talents Program (No. 2012921057), and the Program for Liaoning Excellent Talents in University (LR2015001) for financial support.
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TANG, L., WU, D., HUANG, Z. et al. A fluorescent sensor based on binaphthol-quinoline Schiff base for relay recognition of Zn2+ and oxalate in aqueous media. J Chem Sci 128, 1337–1343 (2016). https://doi.org/10.1007/s12039-016-1124-y
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DOI: https://doi.org/10.1007/s12039-016-1124-y