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《Chemistry》 2009-06
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Enantioseparation of Mandelic Acid Enantiomers by Co-extractants with Di(2-ethylhexyl)phosphoric Acid and Tartaric Acid Derivatives

Wang Zhen,Chen Xiaoqing,Jiao Feipeng,Yang Ling,Li Yisheng(College of Chemistry and Chemical Engineering,Central South University,Changsha 410083)  
The distribution behavior of mandelic acid (MA) enantiomers was examined in a two-phase aqueous-organic solvent mixture containing di (2-ethylhexyl) phosphoric acid (D2EHPA) and tartaric acid derivatives as co-extractants. The influence of tartaric acid derivative's species and its initial concentration,the initial concentration of D2EHPA,D,L-MA and extractive equilibrium temperature on distribution ratio and enantioselectivity were studied. The results showed that both the distribution ratio and enantioselectivity were greatly improved by using D2EHPA and tartaric acid derivatives as co-extractants than using tartaric acid derivatives individually; the co-extractants of D2EHPA and D-tartaric acid derivatives studied all formed more stable diastereomeric complexes with L-MA than with D-MA; the enantioselectivity of D2EHPA and di-p-methylbenzoyl tartaric acid (DTTA) co-extractants were better than D2EHPA and dibenzoyl tartaric acid (DBTA) co-extractants; The influence of the initial concentration of D,L-MA and the extractive equilibrium temperature on distribution ratio and enantioselectivity were significant.
【Fund】: 国家自然科学基金项目(20776162 20805058)资助
【CateGory Index】: R917
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【Citations】
Chinese Journal Full-text Database 2 Hits
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【Co-citations】
Chinese Journal Full-text Database 1 Hits
1 Lei Shuangshuang,Yang Xi,Shen Jingru,Lu Jianjie(Key Laboratory of Analytical Chemistry of the State Ethnic Affairs Commission,College of Chemistry and Materials Science,South-Central University for Nationalities,Wuhan 430074,China);Application of New β-Cyclodextrin Derivative for Separation of Mandelic Acid by High Performance Capillary Electrophoresis[J];Journal of South-Central University for Nationalities(Natural Science Edition);2008-01
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