(中南大学 化学化工学院, 长沙 410083)
摘 要: 以镁铝水滑石为前体， 乙二醇为分散介质， 采用离子交换法进行插层组装制备了光学纯酒石酸柱撑水滑石。 采用X射线衍射、 红外光谱及差热分析对样品进行了表征。 结果表明： 通过控制离子交换条件， 光学纯酒石酸根阴离子可以插入镁铝水滑石层间，完全取代CO2-3离子， 形成具有超分子结构的稳定光学纯酒石酸柱撑水滑石，并将其应用于特布他林对映体的手性萃取过程； 在萃取过程中加入光学纯酒石酸柱撑水滑石粉末， 能明显提高对映体的选择性， 对映体选择性分离因子最大值可达1.2。
关键字: 光学纯酒石酸； 柱撑水滑石； 手性萃取
double hydroxides
（ School of Chemistry and Chemical Engineering,
Central South University, Changsha 410083, China）
Abstract: The optical pure tartaric acid-pillared hydrotalcites were synthesized by direct reaction of the optical pure tartaric acid with Mg4Al2(OH)12CO3·4H2O precursor layered double hydroxides(LDHs). The samples prepared were characterized by XRD, FTIR and DTA. The results show that the initial interlayer carbonate ions can be completely replaced by the optical pure tartaric acid anion under controlled conditions. The stable optical pure tertaric asid-pillared-hydrotalcites with supramolecular structure are formed, which was used in the process of chiral extraction of terbuataline enantiomers. The enantioseletivity can be improved obviously when the optical pure tartaric acid-LDHs powder was added during the process of extraction, the maximal enantioselective separation factor is 1.2.
Key words: optical pure tartaric acid； pillared hydrotalcites； chiral extraction
