环糊精与SEM-25多聚准轮烷的制备及表征

Preparation and characterization of the polyrotaxanes formed by cyclodextrins and SEM-25

SEM-25与环糊精(CD,Cyclodextrin)的包合反应有选择性,可分别与-αCD和-γCD作用形成"管型"多聚准轮烷,但与-βCD不发生作用。分别用FT-IR、XRD1、HNMR等方法对包合物结构进行了表征。研究结果表明,环糊精不仅可以与SEM-25的聚氧乙烯主链段形成准轮烷,还可以与其端基上的苯基形成包合物。

The reaction between SEM-25 and cyclodextrins are selective. SEM-25 can react with α-cyclodextrin and γ-cyclodexlain respectively to form ＂channel type＂ inclusion complexes, the polyrotaxanes, while the inclusion complex between SEM-25 and β-eyelodextrin cannot be prepared. The polyrotaxanes were characterized respectively by FT-IR, XRD and 1^HNMR, The restilts show that cyclodextrins can form an inclusion complex not only with the PEG chain, but also with the phenyl of SEM-25.