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Monodispersed submicron porous silica particles functionalized with CD derivatives for chiral CEC
Journal article   Peer reviewed

Monodispersed submicron porous silica particles functionalized with CD derivatives for chiral CEC

L S Li, Y Wang, David James Young, S C Ng and T T Y Tan
Electrophoresis, Vol.31(2), pp.378-387
2010
DOI: https://doi.org/10.1002/elps.200900318
url
https://doi.org/10.1002/elps.200900318View
Published Version

Abstract

β-CD derivative chiral separations chiral stationary phases packed CEC submicron porous silica particles
Rapid and efficient enantioseparation of halogen aryl alcohols and b-blockers propranolol and pindolol in packed bed CEC (p-CEC) using as-prepared submicron porous silica chiral stationary phases (CSPs) has been achieved. Monodispersed 0.66 and 0.81 mm chiral submicron porous silica spheres were prepared using tetramethoxysilane and hexadecyltrimethylammonium bromide, followed by a hydrothermal treatment method with ammonia-ethanol to expand the pore of silica spheres without changing their spherical morphology. A proper specific surface of ca. 230m2/g and pore sizes average of 6-8 nm were obtained by this method. The submicron porous silica spheres were modified with mono-6-phenylcarbamoylated β-CD via thiol-en radical addition. They were packed into 9 cm 50 mmid capillary columns with photopolymerized monolithic frits. These submicron CSPs showed greater column efficiency (about 476 000 plates/m for 4-iodophenyl-1-ethanol) and higher resolution than the corresponding 3 μm CSP. © 2009 Wiley-VCH Verlag GmbH & Co. KGaA.

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