葫芦脲与主链聚紫精的超分子自组装制备准聚轮烷及其性质研究

通过葫芦[6]脲(CB[6])与五亚甲基聚紫精(PPeV)在水溶液中于室温下进行超分子组装,得到一种新型的准聚轮烷(PPeVCB),通过¹HNMR、元素分析、IR和X射线粉末衍射(XRD)对其结构进行了表征,证实CB[6]位于PPeV的脂肪链上,并通过非共价键与PPeV结合,且CB[6]与PPeV重复单元的结合摩尔比为1∶1;通过热重分析(TGA)、紫外-可见吸收(UV-Vis)和化学还原等方法对其性质进行了研究,证实了准聚轮烷3比相应的聚合物热稳定性更高、UV-Vis吸收和氧化能力更强.

Pseudopolyrotaxane Prepared by Supramolecular Self-assembly of Cucurbituril with Polyviologen and Its Properties

A new kind of pseudopolyrotaxane(PPeVCB) was prepared by supramolecular self-assembly of cucurbituril(CB) with pentamethylene polyviologen(poly(N-4,4'-bipyridinium-N-pentamethylene dibromide, PPeV) in water at room temperature. The chemical structure of PPeVCB was confirmed by elemental analysis, ¹HNMR, IR and X-ray powder diffraction(XRD). The results show that CB beads are localized in the aliphatic chain and combine N+ of PPeV by non-covalent bonds; the molar ratio of CB to repeat unit of PPeV is 1∶1. The properties of pseudopolyrotaxane PPeVCB were researched by thermogravimetry analysis(TGA), UV-Vis measurements and chemical reduction. The results show that PPeVCB has a higher thermal stability, stronger absorption band and higher oxidation ability than the parent polymer.