Hyper-crosslinked Porous Polymer Based on Bulk Rigid Monomer for Gas and Dye Absorptions

Using the rigid 3,3-bis（4-hydroxyphenyl）-2-（4-tritylphenyl）isoindolin-l-one with polar functional groups as a building block and formaldehyde dimethyl acetal（FDA） as crossinglinker, a new hyper-crosslinked polymer （HCP） was synthesized via Friedel-Crafts alkylation reaction promoted by anhydrous FeC13. The synthesized HCP is insoluble in boiled water and common organic solvents. Moreover, it shows a good CO2 capture capacity even if its surface area is not very high, and the absolute COz uptake capacity of it is 3.05 mmol/g. This can be attributed to the introduction of polar hydroxyl and lactam groups into the skeleton of the polymer, which provides effective adsorp- tion sites for COz. In addition, the synthesized HCP also exhibits good adsorption capacity for organic dyes in water, especially for crystal violet.