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Porous poly(ionic liquid)s (PPILs) combine the features of porous materials, polymers, and ionic liquids (ILs) or their derivatives, but they are normally of amorphous structure with disordered pores. Here, we report the facile synthesis of ordered porous poly(ionic liquid) crystallines (OPICs, specialized as a kind of PPIL analogues) with diverse and adjustable framework IL moieties through the Schiff base condensation of IL-derived ionic salts and neutral monomers. Ternary monomer mixtures are employed to artistically control the chemical composition and pore configurations. Compact atomic packing was achieved to give spacing confined ionic surface with strong CO 2 affinity. Through monomer control, OPICs exhibit high CO 2 uptakes with excellent CO 2 /N 2 (CH 4 ) selectivities and efficiently implement CO 2 fixation through catalyzing epoxides cycloaddition under down to ambient conditions.
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Cao et al. (2019) studied this question.
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