摘要
合成了一类新型四酰胺杯[4]氮杂冠醚(5a,5b),用紫外和荧光光谱研究了主体与阴离子客体之间的识别性能.主体分子5a或5b加入到对硝基酚氧阴离子的CHCl3溶液中,主客体间形成超分子复合物使得客体阴离子423nm处吸光度降低且溶液从黄色变为无色.受体5a,5b与p-NO2C6H4O-,F-,H2PO-4相互作用,荧光光谱发生变化,并且对于p-NO2C6H4O-具有较好的选择性识别能力,其荧光光谱强度改变强弱的顺序为p-NO2C6H4O->F->H2PO-4>>Cl?,Br-,I-.荧光光谱滴定的结果经非线性拟合,结果表明主客体间形成1∶1络合物.
Two new tetraamide calix[4](aza)crowns (5a, 5b) were synthesized and used for optical anion sensors. Addition of host 5a or 5b to the p-NO2C6H4O- anion in CHCl3 resulted in decreasing absorption of band at 423 nm and the yellow solution of p-NO2C6H4O- anion became colorless because of the formation of host-guest complexes between host 5a or 5b and p-NO2C6H4O-. The fluorescence response was observed in the presence of anions such as p-NO2C6H4O-, F-, H2PO4-, and the receptors 5a and 5b were highly selective toward p-N02C6H40. The degree of change in the emission intensity was in the order of p-NO2C6H4O- > F- > H2PO4- >> Cl-, Br-, I-. The fluorescence spectroscopy titration experiments indicated the formation of a 1 : 1 stoichiometry complex between receptor 5a (or 5b) and anion by nonlinear fitting curve.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2005年第5期416-420,共5页
Acta Chimica Sinica
基金
国家自然科学基金(No.20372054)资助项目.
