中文摘要：

制备了侧链含α-环糊精（α-CD）的聚丙烯酸（PAA-α-CD）作为主体聚合物，侧链含偶氮基团（Azo）的聚丙烯酰胺（PAM—Azo）作为客体聚合物。利用。HNMR、2DNOESYNMR方法测定了PAA-α-CD与PAM—Azo间的主客体作用。结果表明，PAM-Azo侧链的trans-Azo基团能够被PAA—α-CD侧链的α-CD包结，而cis-Azo基团不能被α-—CD包结。在一定浓度下，PAA—α-CD与PAM—Azo通过主客体间的识别能够形成超分子水凝胶，并且该凝胶具有光响应性。在365nm紫外光光照下，PAM—Azo侧链的trans-Azo转变为cis-Azo，不能被PAA—α-CD侧链的α-CD包结，超分子水凝胶转变为溶胶。而在430nm的可见光光照下，PAM—Azo侧链的cis-Azo转变为trans-AZO，重新被PAA—α-CD侧链的α-CD包结，又可得到超分子水凝胶。

英文摘要：

A α-cyclodextrin （a-CD） modified poly（acrylic acid） （PAA-a-CD） acting as the host-polymer and an azobenzene-branched polyacrylamide （PAM-Azo） acting as the guest-polymer were prepared. The interaction of PAA-α-CD with PAM-Azo was characterized by 1H NMR and 2D NOESY NMR spectroscopy. The 2D NOESY NMR spectroscopy indicate that trans-azobenzene （trans-Azo） units are bounded strongly within the cavities of PAA-a-CD whereas the cis- azobenzene （cis-Azo） is not bound at all. A supramolecular inclusion complex, formed by PAA-α-CD and PAM-Azo, is accompanied by the formation of a light-responsive hydrogel. Upon photoirradiation with UV light of 365nm, the hydrogel is converted efficiently to the sol phase because the trans-Azo units are converted photochemically to their cis configuratons, where upon the resulting cis-Azo units dissociation from PAA-α-CD. The hydrogel can be recovered from the sol phase by photoirradiation with visible light of 430nm.