Abstract：
A covalent organic framework (COF) was gown on porous silica with 1,3,5-tri(4-aminophenyl)benzene and 2,5-divinyl-1,4-phenyldiformaldehyde as monomers, and two ionic liquids were grafted to COF by a click reaction. The materials before and after the modification of ionic liquids were separately packed into solid-phase extraction columns (10 × 4.6 mm, i.d.), which were coupled with liquid chromatography to construct online analysis systems. The extraction mechanisms of polycyclic aromatic hydrocarbons, bisphenols, diphenylalkanes and benzoic acids were investigated on these materials. There were π-π, hydrogen-bond and electrostatic interactions on ionic liquid-functionalized sorbents. After the comparison among these materials, the best sorbent was used, and the analytical method was established and successfully applied to the detection of some estrogens from actual samples. For the analytical method, the detection limit was as low as 0.005 μg L-1, linear range was as wide as 0.017-10.0 μg L-1, and enrichment ratio was as high as 3635. The recoveries in actual samples were 70 %-129 %.
摘要：
以1,3,5-三（4-氨基苯基）苯和2,5-二乙烯基-1,4-苯基二聚甲醛为单体，在多孔二氧化硅上形成了共价有机骨架（COF），通过点击反应将两种离子液体接枝到COF上。将离子液体改性前后的材料分别装入固相萃取柱(10×4.6mm,i.d.),将其与液相色谱耦合以构建在线分析系统。多环芳烃的萃取机理,双酚,在这些材料上研究了二苯基烷烃和苯甲酸。有π-π,离子液体功能化吸附剂上的氢键和静电相互作用。经过这些材料的比较，使用了最好的吸附剂，建立了分析方法，并成功地应用于实际样品中某些雌激素的检测。对于分析方法，检出限低至0.005μgL-1，线性范围宽达0.017-10.0μgL-1，富集比高达3635。在实际样品中的回收率为70%-129%。
