【摘要】 以4,4’-二(咪唑基亚甲基)联苯(bibp)为客体,通过自组装合成了4,4’-二(咪唑基亚甲基)联苯和环糊精的[3]类轮烷,并通过元素分析,~1HNMR,ESI-MS,IR,TG-DSC 进行了表征和固体热稳定性等研究,结果表明:由于bibp客体分子链较长,含有两个苯环,所以可穿入两个β-环糊精分子,形成[3]类轮烷。更多还原

【Abstract】 Pseudo-rotaxane and rotaxane are a kind of important assembled supramolecules. They consist of abead as the host and a string or a chain as the guest threading into the ring of the host. Rotaxane has twostoppers to prevent the host from slipping out from the guest, but pseudo-rotaxane has not or has only onestopper. Common cyclodextrin, crownether and cyclophane can be the host in supramolecular chemistry, andcorresponding guests are selected to bond with host via non-covalence interaction and space matching effect. It isinteresting to note that under the stimulation of outside electric, photonic signals, host of rotaxane and pseudo-rotaxane can be rotating or moving to cause two states, so they have potential applications in fabricating molecularswitch or molecular machine. In this work we synthesized the 4, 4’-(bis(imidazol-1-ylmethylene))biphenyl (bibp), which could beemployed as a guest to produce a kind of new β-cyclodextrin pseud-orotaxane. The pseudoro-taxan wascharacterized by element analysis,ESI-MS, 1D and 2D-~1 HNMR, IR and TG-DSC. The results indicate that bibpcan thread two cyclodextrins and form a [ 3 ] pseudorotaxan with β-cyclodextrin due to its long chain and theexistence of two phenyls.更多还原