七、八元瓜环与二溴化1,n-亚烷基-二-2-甲基吡啶的超分子自组装  

Supramolecular Self-assemblies of Cucurbit[7,8]uril with Certain 1,n-Alkylene-bismethylpyridinum Dibromide

作　　者：肖昕[1] 吴明强[1] 薛赛凤[1] 祝黔江[1] 张建新 陶朱[1] 

机构地区：[1]贵州省大环化学及超分子化学重点实验室贵州大学,贵阳550025 [2]贵州省天然产物化学重点实验室,贵阳550002

出　　处：《有机化学》2012年第1期68-74,共7页Chinese Journal of Organic Chemistry

基　　金：国家自然科学基金(Nos.20961002;21101037);贵州省科学技术基金(Nos.黔科合J字[2010]2005号;[2010]2126号);贵阳市科技局大学生科技创业计划(No.筑科合同(2011201)大-4-3号)资助项目~~

摘　　要：合成和表征了4个碳链长度不同二溴化1,n-亚烷基-二-2-甲基吡啶(客体,n=6,8,10,12),利用1H NMR技术、热重分析及紫外吸收光谱法考察了这些客体与七、八元瓜环(主体)的相互作用,以及形成的主客体包结物的结构特征.研究结果表明4个客体与七、八元瓜环形成不同的主客体包合物.七元瓜环可穿梭在线性客体分子上形成类轮烷型或哑铃型主客体包合物;而由于具有较大的空腔,八元瓜环可包容弯曲状的整个客体分子.Four 1,n-alkylene-di-2-methylpyridinium dibromide（n=6,8,10,12） guests were synthesized and characterized,and the host-guest interactions between cucurbit[7 or 8]urils with these guests were also investigated by using 1H NMR tech-nique,thermogravimetry analysis and UV-Vis measurement in details.The experimental results revealed that it was different in the interaction models of the formed host-guest inclusion complexes between the cucurbit[7]uril with the four guests and the cucurbit[8]uril with the four guests.The cucurbit[7]uril preferred to thread on the linear guests and formed pseudorotax-ane-like or ＂dumbbell＂-like inclusion complexes,while the cucurbit[8]uril preferred to included whole body of a guest in a fold manner due to having a larger cavity.

关 键 词：瓜环 二溴化1 n-亚烷基-二-2-甲基吡啶 类轮烷 超分子自组装 

分 类 号：O621.3[理学—有机化学] O626[理学—化学]