Preparation and Quaternization of Poly (Styrene‐Divinylbenzene) Microspheres Loaded With <i>p</i> ‐Phenylenediamine‐1,3,5‐Triformylphloroglucinol Nanoparticles and Utilized as an Anion Exchanger

Covalent organic framework (COF) has been popularly utilized to prepare chromatographic stationary phases due to its a great diversity of composition, unique structure, easy of modification, and so forth. However, the irregular shape and nanometer size scale of most COF materials greatly hinders their direct utilization as chromatographic column packing. Herein, poly (styrene-divinylbenzene) loaded with p-phenylenediamine-1,3,5-triformylphloroglucinol nanoparticles that derived from p-phenylenediamine and 1,3,5-triformylphloroglucinol microspheres are constructed by in situ growth method. Then, the imine groups of poly (styrene-divinylbenzene)@p-phenylenediamine-1,3,5-triformylphloroglucinol are reduced to amino groups and followed by quaternized. The microspheres are characterized by using SEM, Fourier transform infrared spectra, N₂ adsorption-desorption experiment, and so forth. According to the results, poly (styrene-divinylbenzene)@p-phenylenediamine-1,3,5-triformylphloroglucinol microspheres could perfectly combine and possess the good monodispersity of poly (styrene-divinylbenzene) microspheres and unique functionality of p-phenylenediamine-1,3,5-triformylphloroglucinol nanoparticles. The customized column exhibits good separation properties for conventional anions, organic acids, and carbohydrates.