Cucurbit[6]uril-based supramolecular assembly:its syntheses,structures,capture of heavy metal ions,and sensing properties  

作　　者：Yefang Yang Dechao Li Shaowen Qie Shuai Su Ruijie Xu Wenting Li Wenping Hu Ming Hu 

机构地区：[1]School of Chemistry and Chemical Engineering,Inner Mongolia University,Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials,Hohhot 010021,China

出　　处：《Science China Chemistry》2025年第3期891-899,共9页中国科学(化学英文版)

基　　金：supported by the Natural Science Foundation of Inner Mongolia;the National Natural Science Foundation of China (2021MS02012,21761024,22161032)。

摘　　要：Multidimensional supramolecular assembly(CB[6]-PA)based on cucurbit[6]uril(CB[6])was constructed via the outer-surface interactions of CB[6]with a structure-directing agent of pamoic acid(H_2PA).Most impressively,crystal CB[6]-PA exhibited satisfactory selectivity for the capture of Cd^(2+)and Hg^(2+)cations,and released Cd^(2+)and Hg^(2+)cations under acidic condition.This reversible process allows for capturing applications of Cd^(2+)and Hg^(2+)cations.Furthermore,crystalline CB[6]-PA-Cd demonstrated enhanced fluorescence properties compared with H_2PA ligands.CB[6]-PA-Cd could be employed for the precise detection of methylmalonic acid(EA or MMA)as a biomarker of septicemia.The introduction of EA resulted in the fluorescence quenching of CB[6]-PA-Cd,the mechanism of sensing EAwas clearly elucidated.A portable detection platform was designed to augment the efficiency of EA detection.To promote biological applications,the exceptional probe capable of exactly detecting EA in serum samples had been substantiated.CB[6]-PA-Cd exhibited a negligible cytotoxicity,favorable cytocompatibility,and good hemocompatibility.Thus,these results will bring about new enlightenment for the fabrication of light-emitting materials and high-resolution bio-imaging probes based on cucurbit[n]urils.

关 键 词：uril supramolecular assembly metal ion capture fluorescence probe 

分 类 号：O641.3[理学—物理化学] O657.3[理学—化学]