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

Abstract

Abstract: 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.

Key words: Pseudopolyrotaxane, Polyviologen, Cucurbituril, Self-assembly

CLC Number:

O631

TrendMD:

HOU Zhao-Sheng, TAN Ye-Bang, WANG Cheng-Wei, HUANG Yu-Ling, ZHOU Qi-Feng. Pseudopolyrotaxane Prepared by Supramolecular Self-assembly of Cucurbituril with Polyviologen and Its Properties[J]. Chem. J. Chinese Universities, 2005, 26(4): 773.

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