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trans-(1R,2R)-Diaminocyclohexane-functionalized mesoporous organosilica spheres as chiral stationary phase by Guiru Zhu; Dongmei Jiang; Qihua Yang; Jie Yang; Can Li is a Chemistry article available to read on EtoBox.

What is trans-(1R,2R)-Diaminocyclohexane-functionalized mesoporous organosilica spheres as chiral stationary phase about?

The bifunctionalized mesoporous organosilica spheres with trans-(1R,2R)-diaminocyclohexane (DACH) in the pore were synthesized and their application as chiral stationary phase in high-performance liquid chromatography (HPLC) was demonstrated. Bifunctionalized mesoporous organosilica spheres with narrow particle size distribution of 5-7 m were prepared by the co-condensation of N- [3-(triethoxysilyl)propyl]-trans-(1R,2R)-diaminocyclohexane (M propyl ) with 1,2-bis(trimethoxysilyl)ethane (BTME) in basic medium using octadecyltrimethylammonium chloride (C 18 TACl) as structural directing agent and ethanol as co-solvent. The morphologies of the bifunctionalized mesoporous organosilicas were sensitive to the molar fraction of M propyl . At higher M propyl /BTME molar ratio, the bifunctionalized organosilica spheres with ordered mesoporous structure can be formed in a wide range of synthetic conditions. When the molar percent of M propyl /(M propyl + BTME) is less than 20, the formation of spheres could be hardly observed. The structural order of the materials mainly depends on the base concentration and M propyl /BTME molar ratio in the initial sol mixture. A column packed with the bifu

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Author

Guiru Zhu; Dongmei Jiang; Qihua Yang; Jie Yang; Can Li

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 1873-3778)

Published

2007

Language

EN

Field

Chemistry (Physical Sciences)