Isolation of Chlorogenic Acid from Flaveria bidentis (L.) Kuntze by CCC and Synthesis of Chlorogenic Acid-Intercalated Layered Double Hydroxide

文献类型： 外文期刊

第一作者： Wei, Yun

作者： Wei, Yun;Gao, Yali;Xie, Qianqian;Zhang, Guoliang;Fu, Weidong

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关键词： Counter-current chromatography;Layered double hydroxides;Chlorogenic acid;Flaveria bidentis (L.) Kuntze

期刊名称：CHROMATOGRAPHIA （ 影响因子：2.044； 五年影响因子：1.725 ）

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收录情况： SCI

摘要： Preparative counter-current chromatography (CCC) was successfully used for isolation and purification of chlorogenic acid from Flaveria bidentis (L.) Kuntze with a solvent system composed of ethyl acetate–methanol–water at a volume ratio of 50:1:50, v/v. Using a preparative unit of the CCC centrifuge, about 800?mg of the crude extract was separated, yielding 3.2?mg of chlorogenic acid at a purity of 92.0%. The blood pressure lowering and antivirus chlorogenic acid (C16H18O9) was intercalated into magnesium–aluminum–layered double hydroxides, which was used as host materials for drug-LDH host-guest supermolecular structures by anion exchange under a nitrogen atmosphere. Chlorogenic acid–LDH is a functional and effective drug. The product chlorogenic acid–LDH has been characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR), thermogravimetric analysis (TGA) and scanning electron micrographs (SEM). The X-ray diffraction patterns of NO3 ? form of LDH and chlorogenic acid–LDH were compared, and the basal d spacing value of NO3 ?-LDH layer was 8.75?? (2θ?=?10.100°); however, the basal reflection (003) of chlorogenic acid–LDH shifts to lower 2θ (for 003 reflection: 2θ?=?5.119°) that is expanded to 17.25??, indicating the intercalation of chlorogenic acid into the interlayer of Mg–Al-LDH. Thermogravimetric analysis showed that chlorogenic acid stability had improved, and scanning electron micrographs showed that the morphology of the chlorogenic acid–LDH was irregular masses of distinctly thicker flakes, which was similar to the morphology of NO3 ? form of LDH.

分类号： O65

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