Dual behaviour of maltosyl-beta-cyclodextrins: Investigation of formation of inclusion and glucose-type complexes

To clarify the complexation behaviour of the less studied maltosyl-beta-cyc lodextrin, its interactions with some characteristic guests such as phenolp hthalein and p-nitrophenol have been studied. The results show that similar types of inclusion complexes are formed as in the case of the unsubstitute d beta-cyclodextrin. In addition to the formation of inclusion complexes, m altosyl-beta-cyclodextrins interact with other complexing reagents, like bo rate, vanadate or molybdate and the maltosyl substituent forms sugar-type c omplexes. The properties of these complexes are similar to those of glucose .