Porous organic polymers (POPs) are a fascinating class of materials with the features of high surface areas, synthetic diversity, low densities, and great thermal/chemical stabilities. The exploration of new synthetic strategies to construct POPs with simple building blocks still remains a significant challenge. Herein we develop a type of novel porous organic polymer with hydrophenazine linkages, porous hydrophenazine frameworks (PHFs). PHFs were synthesized via a catalyst-free aza-ring formation reaction between ortho-diamine and benzoquinone. The thermally and physiochemically stable neutral PHF (PHF-1) had a high Brunauer-Emmett-Teller (BET) specific surface area (1046 m2/g) as well as exceptional CO2 adsorption capacity. Intriguingly, the positively charged PHF (PHF-1-Ct) with lower BET surface area displayed an efficient iodine capture capacity (4.05 g/g), which was not only higher than that of PHF-1 (3.05 g/g) but also was the highest among reported amorphous porous organic polymers. The higher iodine loading amount in PHF-1-Ct was ascribed to the multiple binding sites for both neutral iodine molecules and polyiodide anions.<br/>

Benzoquinone-derived porous hydrophenazine framework for efficient and reversible iodine capture

2019 Spring National Meeting

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