In this work, 2,4,6-tris(4-aminophenyl)-1,3,5-triazine (TAPT) and 1,3,5-tris(4-formylphenyl)benzene (TFPB) were used as monomers to construct a triazine-containing imine-linked covalent organic framework (COF), which was then bonded onto the surface of aldehydized silica (SiO-CHO), and finally a COF@silica composite material (TAPT-TFPB COF@SiO) was successfully prepared. The chromatographic separation performance of SiO-CHO, TAPT-TFPB COF@SiO and TAPT-TFPB COF@SiO/SiO-CHO (80/20, mass ratio) was evaluated and compared. It was found that separation efficiency was obviously enhanced by adding an appropriate amount of SiO-CHO into TAPT-TFPB COF@SiO. The obtained TAPT-TFPB COF@SiO/SiO-CHO showed more favorable separation ability than SiO-CHO and TAPT-TFPB COF@SiO. Various aromatic compounds including alkylbenzenes, polycyclic aromatic hydrocarbons, environmental endocrine disruptors, foodborne stimulants and phenyl ketones were effectively separated on the TAPT-TFPB COF@SiO/SiO-CHO column in reversed phase chromatography mode. The silica microspheres surface-modified with triazine-containing imine-linked COFs proved to be a new type of promising chromatographic packing materials.
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| http://dx.doi.org/10.1016/j.talanta.2023.124589 | DOI Listing |
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In this work, 2,4,6-tris(4-aminophenyl)-1,3,5-triazine (TAPT) and 1,3,5-tris(4-formylphenyl)benzene (TFPB) were used as monomers to construct a triazine-containing imine-linked covalent organic framework (COF), which was then bonded onto the surface of aldehydized silica (SiO-CHO), and finally a COF@silica composite material (TAPT-TFPB COF@SiO) was successfully prepared. The chromatographic separation performance of SiO-CHO, TAPT-TFPB COF@SiO and TAPT-TFPB COF@SiO/SiO-CHO (80/20, mass ratio) was evaluated and compared. It was found that separation efficiency was obviously enhanced by adding an appropriate amount of SiO-CHO into TAPT-TFPB COF@SiO.
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