Formation of Side-Chain Hetero-Polypseudorotaxane Composed of α- and β-Cyclodextrins with a Water-Soluble Polymer Bearing Two Recognition Sites
Formation of Side-Chain Hetero-Polypseudorotaxane Composed of α- and β-Cyclodextrins with a Water-Soluble Polymer Bearing Two Recognition Sites
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DOI：
10.1021/ma902712u
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发表时间：
2010-01
期刊：
影响因子：
5.5
通讯作者：
Daisuke Taura;Shujing Li;A. Hashidzume;A. Harada
中科院分区：
文献类型：
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作者：
Daisuke Taura;Shujing Li;A. Hashidzume;A. Harada
以水溶性高分子（1）为原料，经三步反应合成了一种侧链杂环聚硅氧烷，其中α-和β-环糊精（α-CD和β-CD）分别含有C7和cis-Azo基团，并在侧链上连接了低聚乙二醇。在第一步中，α-CD被添加到1中以形成侧链聚紫杉烷，其中α-CD在侧链中包括C7和反式偶氮部分。第二步，侧链末端的偶氮部分异构化为顺式异构体，形成侧链聚轮烷，其中α-CD在侧链上互锁。在最后一步中，将β-CD加入到侧链聚轮烷中以形成侧链杂聚轮烷。
A side-chain hetero-polypseudorotaxane was prepared from a water-soluble polymer (1) bearing heptamethylene (C7) and azobenzene (Azo) moieties connected with oligo(ethylene glycol) in the side chain by three steps, in which α- and β-cyclodextrins (α- and β-CDs) included the C7 and cis-Azo moieties, respectively. In the first step, α-CD was added to 1 to form the side-chain polypseudorotaxane, in which α-CD included both the C7 and trans-Azo moieties in the side chain. In the second step, the Azo moiety at the end of the side chain was isomerized to the cis isomer to form the side-chain polyrotaxane, in which α-CD was interlocked on the side chain. In the final step, β-CD was added to the side-chain polyrotaxane to form the side-chain hetero-polypseudorotaxane.