Cucurbit[8]uril-Mediated Polypseudorotaxane for Enhanced Lanthanide Luminescence Behavior in Water
作者:Weilei Zhou、Yong Chen、Xianyin Dai、Hao-yang Zhang、Yu Liu
DOI:10.1021/acs.orglett.9b03597
日期:2019.12.6
novel supramolecular polypseudorotaxane was successfully constructed with pseudo[3]rotaxanes between pyridine-2,6-dicarboxylic acid imidazolium (G1) and cucurbit[8]uril (CB[8]) and the subsequent coordination with lanthanide ions. Significantly, compared with the pyridine-2,6-dicarboxylic acid imidazolium complex G1@Tb3+, CB[8]-mediated polypseudorotaxane CB[8]@G12@Tb3+ not only displayed enhanced lanthanide
用吡啶[2,6-二羧酸咪唑鎓(G 1)和葫芦[8]尿素(CB [8])之间的拟[3]轮烷成功构建了一种新型的超分子聚伪轮烷,随后与镧系元素离子配位。值得注意的是,与吡啶2,6-二羧酸咪唑鎓配合物G 1 @Tb 3+相比,CB [8]介导的聚伪轮烷CB [8] @G 1 2 @Tb 3+ 不仅表现出增强的镧系元素发光行为,而且激发态寿命(τ)的时间增加了29.1倍(从45.76μs到1.33 ms),量子产率提高了8.7倍(从0.89%到7.81%)( Φ),但在水溶液和固体膜中也表现出对抗生素的特异性荧光反应。