Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (11): 20220417.doi: 10.7503/cjcu20220417

• Analytical Chemistry • Previous Articles     Next Articles

Chiral Metal-organic Cage MOC-PA as a Chiral Stationary Phase for Capillary Electrophoresis

QIN Gaizhao, TANG Minghua, LAI Yalin, YUAN Liming()   

  1. School of Chemistry and Chemical Engineering,Yunnan Normal University,Kunming 650500,China
  • Received:2022-06-13 Online:2022-11-10 Published:2022-08-19
  • Contact: YUAN Liming E-mail:yuan_limingpd@126.com
  • Supported by:
    the National Natural Science Foundation of China(22174125)

Abstract:

A chiral metal-organic cage, [Cu12(LPA12(H2O)12](PA=L-phenylalanine, MOC-PA), was used as a novel stationary phase for capillary electrophoresis separation. The material was characterized by X-ray powder diffractometer, infrared spectroscopy, thermogravimetric analysis and scanning electron microscope. The results showed that the chiral metal-organic cage has good thermal stability and spatial structure. The capillary chromatographic column prepared from this material has a good chiral recognition ability, which can resolve 1,2-diphenylethylene glycol, zopiclone, 4-methyldiphenyl methanol and anisin, as well as nitrophenol. By exploring the optimal conditions for 1,2-diphenylethylene glycol, zopiclone, 4-methyldiphenylcarbinol and anisoin, the effects of voltage, buffer solution concentration and pH on the resolution of chiral samples in capillary electrophoresis were obtained. And the reprodu?cibility study of the capillary column with zopiclone shows that the capillary electrophoresis column prepared from this material has specific stability and reproducibility. Therefore, the metal organic cage is a good chiral stationary phase in capillary electrophoresis, and has certain chiral separation ability and outstanding development prospect in chromatographic separation.

Key words: Metal organic cage, Chiral stationary phase, Capillary electrophoresis, Chiral resolution

CLC Number: 

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