The transformation of nor-seco-cucurbit[10]uril to cucurbit[5]uril and cucurbit[8]uril controlled by its own concentration  

作　　者：Shaojie Deng Peihua Ma Qinghong Bai Xin Xiao 

机构地区：[1]Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province,Department of Chemistry,Guizhou University,Guiyang 550025,China

出　　处：《Chinese Chemical Letters》2025年第2期345-349,共5页中国化学快报(英文版)

基　　金：financial support of National Natural Science Foundation of China(No.22161010)。

摘　　要：Nor-seco-cucurbit[10]uril(ns-CB[10])is a kinetic product with unique structure.The single bridged methylene in its structure makes the molecular cavity of ns-CB[10]more deformable when compared to ordinary cucurbit[n]uril,reducing its structural stability.Repeated experiments showed that ns-CB[10]gradually cracks in an acidic solution and changes the specificity of cucurbit[5]uril(CB[5])and cucurbit[8]uril(CB[8])under more robust acidic solutions and when heated.A series of experiments were designed to study the transformation behavior of ns-CB[10].It was found that the concentration of ns-CB[10]was correlated with the content distribution of CB[5]and CB[8].This study explores the influencing factors and mechanisms of the transformation of ns-CB[10]to CB[5]and CB[8].The results are of great significance for the application of ns-CB[10],understanding the formation mechanism of cucurbit[n]urils.Furthermore,it provides a new pathway for synthesizing new cucurbit[n]urils.

关 键 词：uril Cracking Transformation Concentration control Mechanism 

分 类 号：O624.6[理学—有机化学]