三种瓜环与4,4′-联吡啶及N,N′-二甲基4,4′-联吡啶盐酸盐相互作用的研究  

Interaction Between Three Cucurbiturils and Hydrochloride Salts of 4,4′-Dipyridyl and Its Derivates

作　　者：牟兰[1] 薛赛凤[1] 杜莹[1] 赵云洁[1] 祝黔江[1] 陶朱[1] 

机构地区：[1]贵州大学应用化学研究所,贵阳550025

出　　处：《高等学校化学学报》2006年第4期654-659,共6页Chemical Journal of Chinese Universities

基　　金：贵州省科技厅人才培养基金(批准号:20020204);国家自然科学基金(批准号:20261002);贵州省省长基金项目;贵州省重点项目(批准号:20023004);科技部国际合作项目(批准号:200211003)资助

摘　　要：以七元瓜环(Q[7])和新型椭圆型改性瓜环———对称四甲基取代六元瓜环(TM eQ[6])为主体,4,4′-联吡啶的盐酸盐(44)以及N,N′-二甲基4,4′-联吡啶的盐酸盐(dm44)为客体的主客体相互作用进行了考察.实验结果表明,Q[7]与客体44及dm44作用体系中,客体为了更有效地被主体Q[7]包结,在Q[7]内腔中呈倾斜状分布的几率最高.用核磁共振、循环伏安以及紫外吸收光谱对实验结果进行了印证和补充,验证了TM eQ[6]与客体44及dm44可发生较强的相互作用,形成一维的自组装超分子结构.核磁共振以及循环伏安方法的实验结果表明,没有观察到Q[6]与客体44及dm44的明显作用,而紫外吸收光谱方法证实,Q[6]与客体44确实存在一定的相互作用,比较主客体的结构特征,该作用体系也可能存在自组装的一维超分子结构等多种作用形式.In this paper, the host-guest relationship between a general cucurbit [n = 7] uril （Q[7]） or a new ellipsoid-host——symmetric tetramethyl-cucurbituril （TMeQ[6]） with hydrochloride salts of 4,4＇-dipyridyl （44） or N,N＇-dimethyl-4,4＇-dipyridyl （dm44） was examined for confirming the interaction between cucurbituil （Q[6]） and these guests. The experimental results revealed that Q[7] included the 4,4＇-dipyridyl part of this kind of guests which were inclined in the cavity of Q[7]. The results based on ^1H NMR technique, cyclic voltammetric method and UV absorption spectrophotometric measurement revealed that strong interaction was existed between TMeQ[6] and guest 44 or dm44 and a one-dimensional assembled superamolecular could be formed. ^1H NMR technique and cyclic voltammetric method showed no obvious interaction between Q[6] with the guest 44 and its derivates, however, UV absorption spectrophotometric measurements revealed that kind of interaction of them did occur, comparing the structural characteristic of Q[6] to TMeQ[6], a one-dimensional assembled superamolecular could be also formed between Q[6] and guest 44 and its derivates.

关 键 词：六、七元瓜环 对称四甲基六元瓜环 4 4'-联吡啶盐酸盐及其衍生物 相互作用模式 

分 类 号：O621.15[理学—有机化学]