Sol-gel-derived Macrocyclic Dioxopolyamine Stationary Phase for Open-tubular Electrochromatography

Abstract

Abstract: This paper covers the preparation of a sol-gel-derived macrocyclic dioxopolyamine(1,4,7,10-tetraazaclotridecane-11,13-dione) stationary phase for open tubular capillary electrochromatography(OTCEC). The sol-gel-derived macrocyclic dioxopolyamine capillary columns have shown improved separations of neurotransmitters, isomeric nitrophenols, isomeric dihydroxybenzenes, isomeric aminophenols, isomeric diaminobenzenes and three ortho-halogen anilines, in comparison with those of untreated capillaries. The characteristics of the solgel-derived macrocyclic dioxopolyamine capillary columns are compared with the capillary column modified with the macrocyclic dioxopolyamine by chemically bonded method after etching. The sol-gel method provided a porous silica material with stationary phase in place within the same experimental procedure. This provided speedy fabrications of high-efficiency columns with high surface area and improved phase ratio. We achieved high efficiencies of 60000-340000 plates/m for the various isomeric compounds. The reproducibility migration time and the plate number were pretty good.

Key words: Open tubular electrochromatography, Macrocyclic dioxopolyamine, Sol-gel

CLC Number:

O657.7

TrendMD:

ZENG Zhao-Rui, XIE Chuan-Hui, WANG Yuan-Chao, GUAN Na, FU En-Qin, CHENG Jie-Ke . Sol-gel-derived Macrocyclic Dioxopolyamine Stationary Phase for Open-tubular Electrochromatography[J]. Chem. J. Chinese Universities, 2001, 22(7): 1108.

References

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