Abstract
An amphiphilic γ-cyclodextrin, selectively functionalized with perfluorobutanoyl group, octakis(6- O-perfluorobutanoyl)- γ-cyclodextrin ( γ-CyD-F), was investigated as a potential sustained release carrier for hydrophilic drugs, taking molsidomine (MOL) as a model drug. Supercritical carbon dioxide, an environmentally benign solvent, was used for the preparation of MOL/ γ-CyD-F inclusion complexes. The molecular encapsulation of MOL by the amphiphilic cyclodextrin was confirmed by differential scanning calorimetry (DSC) and powder X-ray diffraction (XRD) studies. Additionally, 1H NMR spectroscopy was used to investigate the inclusion mode of drug with the γ-CyD-F. The in-vitro release of MOL from the peanut oil suspensions into aqueous phase was found to be significantly retarded by the complexation with γ-CyD-F, mainly due to the hydrophobic properties associated with the γ-CyD-F.
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