Recently, we introduced a new polymerization system that allows for the formation of porous carbon materials through an ionothermal cyclotrimerization of task-specific ionic liquids (TSILs) containing nitrile groups without requiring any Lewis acid catalyst. Using this approach, highly porous carbon materials with high thermal and chemical stabilities could be facilely prepared with tailored pore structures. The intermediate polymer structure for the carbonization reaction was proposed to consist of triazine-based frameworks derived from the trimerization reaction of nitrile groups in the TSIL cations. A similar trimerization reaction was also conjectured by Kuhn et al. to rationalize the formation of their triazine-based neutral frameworks from pressurized pyrolysis of benzene nitrile under ZnCl2 catalysis. One of the key differences between our intermediate triazine-based frameworks derived from TSILs and those derived from neutral organic molecules lies in the charged nature of Our planar triazine-based intermediate frameworks. As shown in Figure 1, the putative triazine-based frameworks of the former system are positively charged while the latter polymer systems carry neutral molecular frameworks. Accordingly, our intermediate polymers derived from TSILs prior to carbonization under high-temperature Conditions should exhibit anion-exchange capabilities. In this communication, we would like to report on a novel class of anion-exchange polymers based on cation cross-linked ionic liquids (CCLILs) and disclose our preliminary investigation into their anion-exchange capabilities.
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