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首页> 外文期刊>Journal of chromatography, A: Including electrophoresis and other separation methods >A novel urea-functionalized surface-confined octadecylimidazolium ionic liquid silica stationary phase for reversed-phase liquid chromatography
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A novel urea-functionalized surface-confined octadecylimidazolium ionic liquid silica stationary phase for reversed-phase liquid chromatography

机译：用于反相液相色谱的新型尿素官能化表面受限的十八酰亚胺偶氮离子液体硅胶固定相

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摘要

One-pot synthesis of surface-confined ionic liquid functionalized silica spheres was proposed using N-(3- aminopropyl)imidazole, γ-isopropyltriethoxysilane and 1-bromooctadecane as starting materials. The surface modification of the silica spheres was successful with a high surface density of octadecylimidazolium, enabling the utilization of this new urea-functionalized ionic liquid-grafted silica material as stationary phase for high-performance liquid chromatography in reversed-phase mode. The long aliphatic chain combined with the multiple polar group embedded in the ligands imparted the new stationary phase fine selectivity towards PAH isomers and polar aromatics and higher affinity for phenolic compounds. The unique features of the new material, especially the effect of the urea group on the retention were elucidated by mathematic modeling.
机译：提出了以N-（3-氨基丙基）咪唑，γ-异丙基三乙氧基硅烷和1-溴十八烷为原料的一锅法合成的表面受限的离子液体官能化二氧化硅球。二氧化硅球的表面改性成功实现了十八碳杂环咪唑的高表面密度，从而使这种新型的尿素官能化离子液体接枝二氧化硅材料可作为固定相用于反相模式下的高效液相色谱。长的脂族链与嵌入配体中的多个极性基团相结合，赋予了新的固定相对PAH异构体和极性芳族化合物的优良选择性，并且对酚类化合物的亲和力更高。数学建模阐明了这种新材料的独特功能，特别是脲基对保留率的影响。

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