SURFACTANT INCLUSIONS BY MODIFIED BETA-CYCLODEXTRINS

Binding constants for the inclusion of sodium alkane-1-sulfonates (C5-C-10, C-12) by four modified beta-cyclodextrins (2,6-O-dimethyl-beta-cyclodextrin, 2,3,6-O-trimethyl-beta-cyclodextrin, hydroxypropyl-beta-cyclodextrin and maltosyl-beta-cyclodextrin) were determined conductimetrically at 25-degrees-C. Binding increased with increasing length of the alkyl chain. Generally, the substituted beta-cyclodextrins were no more effective as encapsulating agents than ordinary beta-cyclodextrin with the persubstituted 2,3,6-O-trimethyl-beta-cyclodextrin being the weakest.