The orientation of anionic β-cyclodextrin in the interlayer space of Zn/Al layered double hydroxide Original Research Article

The anionic β-cyclodextrins, sulfopropylated-β-cyclodextrin and carboxyethylated-β-cyclodextrin, have been intercalated into a Zn/Al layered double hydroxide by an ion-exchanging reaction. X-ray diffraction patterns show single-phase hybrids with high crystallinity. Detailed orientations of intercalated anionic β-cyclodextrins are evaluated by considering the parameters such as the degree of charge compensation between host and guest, the area demand of β-cyclodextrin molecules, and the interlayer space of the intercalate. Based on the results, we elucidate a model for the arrangement of anionic β-cyclodextrin molecule in the layered double hydroxide.