摘要
Two new neutral receptors (1 and 2) containing (thio)urea and amide groups were synthesized by simple steps in good yields. The binding properties for anions of 1 and 2 were characterized by UV-vis and fluorescence spectra. Receptor 1 had an excellent selectivity for AcO - in comparison with other anions. The association constants of 1·AcO - and 2·p-NO_2PhOPO 2- _3 were higher than those of other anions (Cl -,Br -,I -,H_2PO -_4 and p-NO_2PhO -). In particular,an obvious color change was observed from light yellow to golden yellow upon addition of AcO - to the solution of 1 in DMSO. The results of non-linear curve fitting by UV-vis and fluorescence spectral data indicate that a 1∶1 stoichiometry complex is formed between compound 1 or 2 and anions through a hydrogen bonding interaction.
Two new neutral receptors (1 and 2) containing (thio)urea and amide groups were synthesized by simple steps in good yields. The binding properties for anions of 1 and 2 were characterized by UV-vis and fluorescence spectra. Receptor 1 had an excellent selectivity for AcO - in comparison with other anions. The association constants of 1·AcO - and 2·p-NO_2PhOPO 2- _3 were higher than those of other anions (Cl -,Br -,I -,H_2PO -_4 and p-NO_2PhO -). In particular,an obvious color change was observed from light yellow to golden yellow upon addition of AcO - to the solution of 1 in DMSO. The results of non-linear curve fitting by UV-vis and fluorescence spectral data indicate that a 1∶1 stoichiometry complex is formed between compound 1 or 2 and anions through a hydrogen bonding interaction.
基金
ProjectsupportedbytheNationalNaturalScienceFoundationofChina (No .2 0 0 72 0 2 9)
