Complexation dynamics of xanthone and thioxanthone to (beta)-cyclodextrin derivatives

The relocation of the excited triplet-state ketones from the cyclodextrins (CD) cavity to the aqueous phase was followed for studying the complexation dynamics of xanthone and thioxanthone to substituted (beta)-cyclodextrin derivatives. Results suggest that the ground-state complexation efficiency and the binding dynamics of a neutral guest molecule is affected by the substitution on the rim of (beta)-CD.