新型杯[4]芳烃衍生物的合成及其对镧系金属离子的识别研究

超分子化学是与材料化学、信息科学和生命科学等学科紧密相关的一门交叉学科, 近年来得到了人们越来越多的关注. 分子识别是超分子化学的核心研究内容之一, 也是生命体系中普遍存在的现象. 目前分子识别的主体化合物有3代: 冠醚、 环糊精和杯芳烃. 杯芳烃因具有空腔大小可调、构象可变换、易于化学修饰和既是离子受体又是分子受体等特点, 而成为近年来的研究热点.

Synthesis of a Novel Host-calix[4]arene Derivative and Its Application to Recognition Analysis of Lanthanide Ions

The synthesis of the novel host compound carrying two spirobenzopyran groups was described.Its structure was confirmed by()~1H NMR,IR and elemental analysis.It was shown that the novel host can recognize lanthanide ions selectively with significant spectral shifts in visible region and enhanced absorbance.Thus,the compound can be used to recognize lanthanide ions by naked eyes. The selectivity was relative to size-fit effect.The order of spectral changes was Yb~(3+)>Er~(3+)>Gd~(3+)>Dy~(3+)>Eu~(3+)>Pr~(3+)>La~(3+),which is opposite to the order of the radii of lanthanide ions.We discussed the possible binding mechanism with analyzing the different UV-Vis spectral changes resulted by addition of the investigated ions.