化学
沸石咪唑盐骨架
咪唑酯
硫脲
烷基苯
毛细管电色谱
色谱法
二乙烯基苯
多孔性
毛细管作用
整体式高效液相色谱柱
吸附
聚合物
苯
金属有机骨架
化学工程
共聚物
高效液相色谱法
有机化学
毛细管电泳
复合材料
材料科学
苯乙烯
工程类
作者
Zhihua Zhong,Manman Zhu,Zhanying Chu,Xingfa Ren,Bingfang Tu,Weibing Zhang,Lingyi Zhang
标识
DOI:10.1016/j.chroma.2022.462880
摘要
An ultra-long (5 m) open tubular capillary liquid chromatographic column was prepared by incorporating Metal Organic Framework (MOF), zeolitic imidazolate framework-8 (ZIF-8), directly into polymer coating, which was synthesized by the copolymerization of 4-vinylbenzyl chloride and divinylbenzene, on the capillary inner surface. The prepared ZIF-8 incorporate polymeric open tubular capillary column (denoted as ZIF-8-p(VBC/DVB) OTCC) was evaluated with thiourea, alkylbenzenes and polycyclic aromatic hydrocarbons as probe molecules. The results showed that the ultra-long column achieved absolute column efficiency of 130,000 plates for thiourea, and the incorporation of ZIF-8 effectively improved the chromatography performance of the OTCC. Baseline separation of aromatic compounds and position isomers was achieved based on multiple interactions provided by the zeolitic imidazolate framework and polymer, including hydrophobic interaction, π-π stacking interaction and the coordination effect. The RSD values (run-to-run, day-to-day, column-to-column, n = 3) of retention time of phenylenediamine isomers and propylbenzene isomers were less than 0.7%, 1.2% and 4.0% respectively, suggesting excellent repeatability. Finally, the prepared ZIF-8-p(VBC/DVB) OTCC was applied to the separation of hydroxyacetophenone isomers with satisfied results.
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