Quaternary piperidinium cation was incorporated into aryl-ether-bond-free fluorene-based polymer by flexible alkyl side chains to synthesize a highly conductive and chemically stable anion exchange membrane (AEM). The membrane of the OH⁻ form shows good solubility in dimethyl sulfoxide and methanol but not soluble in water. In a fully hydrated state, the OH⁻ conductivity reached 58 mS cm⁻¹ at 80 °C. The results of ¹H NMR spectra revealed that the alkyl-substituted N-methylpiperidinium cationic group was excellent alkaline stable as only 13% cationic group was degraded after 168 h storage in 1 M NaOH solution at 80 °C.

中文翻译：

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含脂环族季铵基团的无醚键芴基阴离子交换聚合物的碱性稳定性

通过柔性烷基侧链将季哌啶鎓阳离子掺入无芳基醚键的芴基聚合物中，以合成高导电性和化学稳定性的阴离子交换膜（AEM）。中的OH的膜^-形式示出了在二甲亚砜和甲醇良好的溶解性，但不溶于水。在完全水合状态下，OH ^-导电率达到58毫秒cm的^-1在80℃。¹ H NMR光谱的结果表明，烷基取代的N-甲基哌啶鎓阳离子基团具有优异的碱稳定性，因为在80℃下于1M NaOH溶液中储存168小时后仅降解了13％的阳离子基团。