七元瓜环与N,N'-二甲基-苯甲基-1,10-二氨基癸烷的超分子自组装

Supramolecular Self-assemblies of Cucurbit[7]uril with N,N'-Bis(4-dimethylaminobenzyl)-decane-1,10-diamine

设计合成了具有多个作用位点的长链分子N,N'-二甲基-苯甲基-1,10二氨基癸烷(C10DA)并将其作为客体,利用1H NMR、紫外吸收光谱及荧光光谱等手段考察了C10DA与七元瓜环(主体)的相互作用,以及形成的主客体包结配合物的结构特征.结果表明,随着主客体摩尔比的变化,其作用模式从类轮烷型包结配合物转变成哑铃型包结配合物,这一特性在分子器件的制备方面具有潜在的应用前景.

Molecular motions are quite common in biosystems and closely related to macroscopic motions guest. In the present work, N, N＇-bis （4-dimethylaminobenzyl） -deeane-1,10-diamine （ C 10DA ） with multiple binding sites was designed and synthesized, while the structures and interaction of eucurbit [ 7 ] uril with the guest were investigated by ^1H NMR technique, electronic absorption and fluorescence spectroscopies in details. The experimental results showed that cucurbit[ 7 ] uril can include C10DA forming a pseudorotaxane inclusion complexes or dumbbell-shaped inclusion complexes by changing the molar ratio of the host and guest. This observation contributes to a deeper understanding in molecular recognition, design and construction of novel molecular machines.