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逐步后修改皮里丁-伊胺COF,以提高水解稳定性和质子导电性

Hongfei Wang¹, Wen-Na Jiao¹, Wei-De Zhu¹

¹GBRCE for Functional Molecular Engineering, LIFM, IGCME, School of Chemistry, Sun Yat-Sen University, Guangzhou, 510275, China.

Angewandte Chemie (International ed. in English)

|June 24, 2025

概括

这项研究增强了对质子导电的共价有机框架 (COF). 一种新的后合成方法在潮湿条件下提高了稳定性和导电性,这对于燃料电池至关重要.

科学领域:

材料科学材料科学材料科学
化学化学化学
化学工程是化学工程的重要组成部分.

背景情况:

共价有机框架 (COF) 对质子导电具有前景.
基于 imine 键的 COF 在潮湿的环境中遭受水解不稳定.
由于在潮湿条件下降解,COF的长期性能受到限制.

研究的目的:

开发一种后合成策略,以提高胺基COF的水解稳定性和水友性.
为了提高COF的质子导电性,用于潮湿环境中的应用.
在修改过程中保持COF的结晶性和多孔性.

主要方法:

使用具有氨基和乙烯基组的双功能单体构建了一个初级COF (COF-LIFM7).
应用的合成后修饰:胺基形成和化N-氧化.
以稳定性,多孔性和质子导电性来表征修改后的COF (COF-LIFM7-胺和COF-LIFM7-胺-N+O−).

主要成果:

逐步修改增加了孔径极性和结位,增强了水的亲和力.
在COF-LIFM7-Amide-N+O−的质子导电性中实现了三级的增强.
在95%的相对湿度和70°C时,质子导电率达到1.9 × 10−3 S cm−1.

结论:

开发的后合成方法显著提高了COF的水解稳定性和质子导电性.
修改后的COF在潮湿条件下在质子导电方面表现出很高的性能.
该策略提供了一个可通用的方法来调整COF属性用于能源应用.

关键词:

协价有机框架协价有机框架质子导电传导的质子导电.皮里丁-胺基氨基.逐步进行后修改后的修改.水的吸附方式是吸附水.

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