title: Design of two pyrazole-based sensors with similar configuration and different fluorescent response to anions.
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 (1)H NMR, COSY spectrum, (13)C 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(-), H(2)PO (4) (-) to form 2:1 host-guest complexation, while L2 bind anions to form 1:1 host-guest complexation in the solution.
authors: Department of Chemistry, Nankai University, Tianjin, 300071, People's Republic of China.
authors: Yaping
authors: Y
authors: Li
authors: Jie
authors: J
authors: Shao
authors: Xudong
authors: X
authors: Yu
authors: Xiufang
authors: X
authors: Xu
authors: Hai
authors: H
authors: Lin
authors: Zunsheng
authors: Z
authors: Cai
authors: Huakuan
authors: H
authors: Lin
mesh_terms: D000838:Anions / Q000032:analysis / Q000737:chemistry; D015195:Drug Design; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D010659:Phenylhydrazines / Q000737:chemistry; D011720:Pyrazoles / Q000138:chemical synthesis / Q000737:chemistry*; D013057:Spectrum Analysis
chemical_list: D000838:Anions; D005456:Fluorescent Dyes; D010659:Phenylhydrazines; D011720:Pyrazoles