External stimulus-responsive supramolecular structures formed by a stilbene cyclodextrin dimer
External stimulus-responsive supramolecular structures formed by a stilbene cyclodextrin dimer
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DOI：
10.1021/ja075139p
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发表时间：
2007-10-24
影响因子：
15
通讯作者：
Harada, Akira
中科院分区：
文献类型：
--
作者：
Kuad, Paul;Miyawaki, Atsuhisa;Harada, Akira
使用二苯乙烯双（β-CD）二聚体和二位金刚烷基客体制备了基于环糊精（CD）的超分子复合物。水溶液中二苯乙烯双(β-CD)二聚体的构象可以通过光化学方法控制。 β-CD二聚体与金刚烷基二聚体的ROESY谱显示金刚烷基部分的质子与CD的内部质子之间存在NOE。当主体环糊精二聚体处于反式构象时，在溶液中形成超分子二聚体或小组装体，而处于顺式构象时观察到具有高分子量的超分子线性聚合物。因此，超分子聚合物的结构可以通过外部刺激来控制。
Cyclodextrin (CD) based supramolecular complexes have been prepared using a stilbene bis(beta-CD) dimer and a ditopic adamantyl guest. The conformation of the stilbene bis(beta-CD) dimer in aqueous solutions could be photochemically controlled. The ROESY spectra of the beta-CD dimer with the adamantyl dimer showed NOE between the protons of adamantyl moieties and the inner protons of the CD. When the host cycloclextrin dimer was in trans conformation, supramolecular dimers or small assemblies are formed in solutions, whereas in its cis conformation supramolecular linear polymers with high molecular weight were observed. Thus the structure of the supramolecular polymers could be controlled by an external stimulus.