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首页> 外文期刊>ACS applied materials & interfaces >Cationic Ionic Liquids Organic Ligands Based Metal-Organic Frameworks for Fabrication of Core-Shell Microspheres for Hydrophilic Interaction Liquid Chromatography
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Cationic Ionic Liquids Organic Ligands Based Metal-Organic Frameworks for Fabrication of Core-Shell Microspheres for Hydrophilic Interaction Liquid Chromatography

机译：阳离子离子液体基于有机配体的金属有机骨架，用于制造亲水相互作用液相色谱的核壳微球

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摘要

In this study, new metal-organic frameworks (MOFs) nanocrystals modified SiO2 core-shell microspheres were designed with cationic ionic liquids (ILs) 1,3-bis(4-carboxybutyl)imidazolium bromide (ILI) as organic ligands. By further adjustment the growth cycles, the new ILI-01@SiO2 coreshell stationary phase was facilely fabricated. The developed stationary phase was respectively characterized via element analysis, thermogravimetric analysis, scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectrometry. Because the introduction of cationic imidazolium-based ILs ILI for fabrication of the MOFs nanocrystals shell, the new stationary phase exhibits the retention mechanism of hydrophilic interaction liquid chromatography (HILIC). Many polar samples, such as amides, vitamins, nucleic acid bases, and nucleosides, were utilized to investigate the performance of the prepared ILI-01@SiO2 column. Compared to the conventional aminosilica column, the new ILI-01@SiO2 column displays high separation selectivity in a shorter separation time. Furthermore, the new ILI-01@SiO2 column was also used for detection of illegal melamine addition in the baby formula. All the above results demonstrate the new ILI-01@SiO2 core-shell stationary phase is of good potentials for high-selectivity separation the polar samples.
机译：在这项研究中，以阳离子离子液体（ILs）1,3-双（4-羧丁基）咪唑鎓溴化物（ILI）为有机配体，设计了新的金属-有机骨架（MOFs）纳米晶体修饰的SiO2核-壳微球。通过进一步调整生长周期，可以轻松制造出新的ILI-01 @ SiO2核壳固定相。通过元素分析，热重分析，扫描电子显微镜，X射线衍射和傅里叶变换红外光谱分别表征已开发的固定相。由于引入了基于咪唑类的阳离子ILs ILI来制造MOFs纳米晶体壳，因此新的固定相展现出亲水相互作用液相色谱（HILIC）的保留机理。许多极性样品（例如酰胺，维生素，核酸碱基和核苷）被用于研究制备的ILI-01 @ SiO2色谱柱的性能。与传统的氨基硅胶色谱柱相比，新型ILI-01 @ SiO2色谱柱在较短的分离时间内显示出高分离选择性。此外，新的ILI-01 @ SiO2色谱柱还用于检测婴儿配方食品中非法添加的三聚氰胺。以上所有结果表明，新型ILI-01 @ SiO2核-壳固定相具有高选择性分离极性样品的潜力。

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