(中南大學(xué) 化學(xué)化工學(xué)院, 長沙 410083)
摘 要: 以鎂鋁水滑石為前體， 乙二醇為分散介質(zhì)， 采用離子交換法進(jìn)行插層組裝制備了光學(xué)純酒石酸柱撐水滑石。 采用X射線衍射、 紅外光譜及差熱分析對(duì)樣品進(jìn)行了表征。 結(jié)果表明： 通過控制離子交換條件， 光學(xué)純酒石酸根陰離子可以插入鎂鋁水滑石層間，完全取代CO2-3離子， 形成具有超分子結(jié)構(gòu)的穩(wěn)定光學(xué)純酒石酸柱撐水滑石，并將其應(yīng)用于特布他林對(duì)映體的手性萃取過程； 在萃取過程中加入光學(xué)純酒石酸柱撐水滑石粉末， 能明顯提高對(duì)映體的選擇性， 對(duì)映體選擇性分離因子最大值可達(dá)1.2。
關(guān)鍵字: 光學(xué)純酒石酸； 柱撐水滑石； 手性萃取
double hydroxides
YU Jin-gang， NING Feng-rong
（ 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
