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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 compounds with different carbon chain lengths were synthesized and characterized by 1H NMR, TG-DTA, 1H-NMR, And ultraviolet absorption spectroscopy were used to investigate the interaction between these objects and seven or eight melon rings (main body) and the structural characteristics of the host-guest inclusion. The results show that the formation of four objects is different from that of seven or eight Of the host-guest inclusion complexes .7 melon ring can shuttle in the linear guest molecules to form a class of rotaxan or dumbbell-type host-guest inclusion complex; and because of the larger cavity, octagonal melon ring can accommodate curved The entire guest molecule.