Preparation and enantiosorption of L-aspartic acid pillared hydrotalcites  

作　　者：彭霞辉 黄可龙 

机构地区：[1]Department of Chemistry and Environment Science, Changsha University [2]School of Chemistry and Chemical Engineering, Central South University

出　　处：《Journal of Central South University of Technology》2007年第4期520-523,共4页中南工业大学学报（英文版）

基　　金：Project(20376085) supported by the National Natural Science Foundation of China;Project(05C053) supported by Education Department of Hunan Province, China

摘　　要：L-aspartic acid （Asp） pillared hydrotalcites were prepared by direct reaction of the L-Asp anion with layered double hydroxides （LDHs）. The obtained samples were characterized by X-ray diffractometry （XRD）, Fourier transform infrared （FTIR）, and thermogravimetric and differential thermal analysis （TG/DTA）. The results show that the initial interlayer carbonate ions can be completely replaced by the L-Asp anion under the controlled conditions. The pillared hydrotalcites have a crystallized supramolecular structure and thermal stability. The L-Asp pillared LDHs were used in the enantiosorption of enantiopure phenylalanine （Pile）, the results suggest that L-Asp pillared LDHs exhibit an excellent enantiosorption capability for D-Phe, and the adsorption isotherm fits Freundlich equation.L-aspartic acid(Asp)pillared hydrotalcites were prepared by direct reaction of the L-Asp anion with layered double hydroxides(LDHs).The obtained samples were characterized by X-ray diffractometry(XRD),Fourier transform infrared(FTIR),and thermogravimetric and differential thermal analysis(TG/DTA).The results show that the initial interlayer carbonate ions can be completely replaced by the L-Asp anion under the controlled conditions.The pillared hydrotalcites have a crystallized supramolecular structure and thermal stability.The L-Asp pillared LDHs were used in the enantiosorption of enantiopure phenylalanine(Phe),the results suggest that L-Asp pillared LDHs exhibit an excellent enantiosorption capability for D-Phe,and the adsorption isotherm fits Freundlich equation.

关 键 词：L-aspartic acid HYDROTALCITES PREPARATION enantiosorption PHENYLALANINE 

分 类 号：O611.3[理学—无机化学] O647.3[理学—化学]