A Comparative Study on the Formation and Spectral Propertiesof the Polypseudorotaxanes of β-Cyclodextrin and Poly(propylene glycol) under Different Conditions

摘要

The results of this paper answer the questions, "Can hydrothermal conditions with higher pressure and highertemperature be used for the preparation of polypseudorotaxanes of cyclodextrins with polymers? If yes, do the preparedpolypseudorotaxanes have different stoichiometries and spectral properties from those obtained by the same hosts andguests under nonhydrothermal conditions?" Two polypseudorotaxanes, 1 and 2, formed by PPG and /3-CD, were preparedwith magnetic stirring and a hydrothermal method, respectively, in this work. Our results indicate that different host–gueststoichiometries and stacking forms between 1 and 2 significantly change their structural properties and thermal behaviors,implying that a close relationship exists between preparation conditions and spectral properties of the polypseudorotax-anes.