Anionic fluororeceptors based on thiourea and hydrazide: Synthesis and recognition properties

作者：Wu JL; He YB^*; Wei LH; Liu SY; Meng LZ; Hu L

来源：Supramolecular Chemistry, 2004, 16(5): 353-359.

DOI：10.1080/1061027042000224649

• neutral anion receptor
• hydrogen bonding
• anion recognition
• fluorescence
• UV-Vis spectrum

Two new neutral receptors (1 and 2) containing thiourea and hydrazide groups were synthesized by simple steps in high yields. The binding properties of 1 and 2 for various anions were characterized by UV-Vis and fluorescence spectra. Receptor I had a good selectivity for AcO- in comparison with other anions. The association constants of 1(.)AcO(-) and 2(.)p-NO2PhO- were greater than those of other anions (H2PO4-, Cl-, Br- and I-). In particular, an obvious color change from light yellow to orange-red was observed upon addition of AcO- to the solution of 1 in DMSO. The results of nonlinear curve fitting by fluorescence spectral data indicate that a complex of 1:1 stoichiometry is formed between compound 1 or 2 and the anions through hydrogen-bonding interaction.

• 出版日期2004-8
• 单位武汉大学