柱[5]芳烃对丙烯腈分子的识别作用

The recognition of acrylonitrile by Pillar[5]arenes

以三氟化硼乙醚为催化剂,催化1,4-对甲氧基苯和多聚甲醛发生反应,生成具有高亲和性的全甲氧基柱[5]芳烃,通过核磁、紫外及荧光等检测手段研究了柱[5]芳烃对丙烯腈的分子识别能力.研究结果表明,柱[5]芳烃和丙烯腈可在氯仿中形成1∶1的主客体络合物,络合常数为1.29×10^2 L·mol^-1,同时柱[5]芳烃对丙烯腈具有刺激响应性,可作为荧光分子探针检测丙烯腈,检测限度为2.32×10^-6 mol·L^-1.

In this experiment, boron trifluoride etherate was used as a catalyst to catalyze the reaction of 1,4-p-methoxybenzene and paraformaldehyde to form a full-methoxy Pillar[5]arenes with high affinity, and NMR, UV-Vis absorption and fluorescence spectroscopy detection methods were used to study the molecular recognition ability of Pillar[5]arenes to acrylonitrile. The results show that the Pillar[5]arene and acrylonitrile can form a 1∶1 host-guest complex in chloroform with a complexation constant of 1.29×10^2 L·mol^-1. At the same time, the Pillar[5]arene stimulating responsiveness to acrylonitrile, and can be used as a fluorescent molecular probe to detect acrylonitrile with a detection limit of 2.32×10^-6 mol·L^-1. This has contributed to the future development of molecular recognition and molecular assembly of column aromatics.