Preparation Of A Novel Material By Intercalating Sulfated β-Cyclodextrins Into Layered Double Hydroxide And Primary Stdies On Its Selective Adsorption To Chiral Compound

A novel intercalate derived from layered double hydroxide and sulfatedβ-cyclodextrins has been prepared. The structure and the thermal decomposition behavior of the new intercalate have been studied in detail, and its selective adsorption to racemic (R,S)-1-Phenyl-1,2-ethanediol was studied primarily.The sodium salt of hexasulfatedβ-cyclodextrins was prepared, and it was intercalated into layers of Mg/Al, Zn/Al, Li/Al layered double hydroxide separately. The supramolecular structure and chemical composition of the intercalated materials were confirmed by XRD, FT-IR and element analysis. The thermal decomposition behavior of the complex material was investigated by in situ FT-IR, in situ XRD,TPDE-GC-MS and TG-DTA. The thermal stability of intercalated sulfatedβ-cyclodextrin in LDHs was enhanced remarkably compared with the pristine guest.The adsorption behavior of the intercalated material to the racemic (R,S)-1-Phenyl-1,2-ethanediol has been studied primarily. It was found that the intercalate shows selective adsorption to racemic(R,S)-1-Phenyl-1,2-ethanediol by FT-IR, UV, XRD and Spectropolarimetry. The value of excessive enantiomer (e.e%) was obtained by quantity experiment. The adsorption isotherm of the intercalated material to (R,S)-1-Phenyl-1,2-ethanediol displays a characteristic Langmuir adsorption.