Prepar ation and properti es of nanorotaxane from a-C yclodextrin and Poly (ethylene glycol) with Poly ( vinyl alco hol)

Poly (ethylene glycol) makes a r eversible co mplex inclusion compound with Į– cyclodextrin. Meanwhile, cyclodextrin s (CDs) are a series of natural cyclic oligosacc harides com posed of ۶, ۷, or ۸ D(+)-glucose units which are connected through Į- ۱,۴-bonding s namely a -, β-, or ƴ-CD,respectively. Various m olecules ca n be fitted into the cavities of C Ds to form supramol ecular inclusion complexes, which have been widel y studied as models to explain m echanism o f the molecular identification. The current work aims to prepare and examine regularly shaped, hexagonal c omplexes of Į-CD usin g PEG in t he presence of PVA. Th e sonic energy was found to have major e ffect on the formation of discrete size microcr ystals for complex inclusion compounds of P EG-Į-CD in PVA solution. Bo th the time and the sonic energy at room temperature (۲۵۰C) were eff ective factors of t his process. Right concentration of PVA could facilitate the formation of discrete h exagonal microcrystals.

کلیدواژه ها:

Cyclodextrin” ، ” Poly (ethylene glycol)” ، ” Poly (vin yl alcohol)” ، “Sonication” ، “ Hexagonal microstruct ures”.