Design of Two Pyrazole-Based Sensors with Similar Configuration and Different Fluorescent Response to Anions |
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| Authors: | Yaping Li Jie Shao Xudong Yu Xiufang Xu Hai Lin Zunsheng Cai Huakuan Lin |
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| Affiliation: | (1) Department of Chemistry, Nankai University, Tianjin, 300071, People’s Republic of China;(2) Key Laboratory of Functional Polymer Materials of Ministry of Education, Nankai University, Tianjin, 300071, China; |
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| Abstract: | Two simple fluorescent anion receptors based on 1-phenyl-3-methylpyrozole-5-one-4-one phenylhydrazone (L1) and 1-phenyl-3-methylpyrozole-5-one-4-one p-nitrophenylhydrazone (L2) were designed, synthesized and characterized with 1H NMR, COSY spectrum, 13C NMR, ESI-mass and elemental analyse. Interestingly, two receptors with similar configuration exhibited different anion binding behaviors in DMSO solution. The results of Job plots and ESI-mass spectrum indicate that L1 bind anions such as F−, AcO−, H2PO4− to form 2:1 host-guest complexation, while L2 bind anions to form 1:1 host-guest complexation in the solution. |
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