Preparation and characterization of polymer-based stationary phase modified with Thiacalix[4]arene
We have prepared a polymer-based stationary phase modified with thiacalix[4]arene. Thiacalix[4]arene (5,11,17,23-tetra-tert-butyl-25,26,27,28-tetrahydroxy-2,8,14,20-tetrathiacalix[4]arene) is an amphiphilic molecule, that consists of four p-tert-butylphenol-related groups cyclically connected throug...
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Published in | BUNSEKI KAGAKU Vol. 53; no. 10; pp. 1073 - 1077 |
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Main Authors | , , |
Format | Journal Article |
Language | Japanese |
Published |
The Japan Society for Analytical Chemistry
01.10.2004
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Subjects | |
Online Access | Get full text |
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Summary: | We have prepared a polymer-based stationary phase modified with thiacalix[4]arene. Thiacalix[4]arene (5,11,17,23-tetra-tert-butyl-25,26,27,28-tetrahydroxy-2,8,14,20-tetrathiacalix[4]arene) is an amphiphilic molecule, that consists of four p-tert-butylphenol-related groups cyclically connected through a single sulphur atom between each pair. It has a high-electron density area formed by hydroxyl groups and sulfur atoms. We studied the applicability of this interesting compound as a selector because of its specific feature for high-performance liquid chromatography (HPLC). First of all, uniformly sized polymer particles were prepared using ethylene glycol dimethacrylate (EDMA) as a cross-linker through a multi-step swelling and polymerization method. Methacrylic acid (MAA) was introduced onto the surface of polymer particles through an invented modification method. Thiacalix[4]arene was cavalently bonded to MAA using 1,4-dibromo-butane as a spacer to reduce any steric hindrance of MAA on the surface of the polymer particles. The prepared polymer-based stationary phase was evaluated with HPLC. It provided a specific chromatographic retention behavior only for catechol among positional isomers of xylene, cresol, and benzene-diol. Catecholamine showed a specific chromatographic retention behavior as catechol. |
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ISSN: | 0525-1931 |
DOI: | 10.2116/bunsekikagaku.53.1073 |