Kim Sun Young, Kang Minjung, Kang Dong Won, Kim Hyojin, Choe Jong Hyeak, Yun Hongryeol, Hong Chang Seop
Department of Chemistry, Korea university, Seoul, 02841, Republic of Korea.
Angew Chem Int Ed Engl. 2023 Jan 9;62(2):e202214301. doi: 10.1002/anie.202214301. Epub 2022 Dec 7.
We proposed a new strategy to maximize the density of acidic groups by modulating the electronic effects of the substituents for high-performance proton conductors. The conductivity of the sulfonated 1-MeL40-S with methyl group corresponds to 2.29×10 S cm at 80 °C and 90 % relative humidity, remarkably an 22100-fold enhancement over the nonsulfonated 1-MeL40. 1-MeL40-S maintains long-term conductivity for one month. We confirm that this synthetic method is generalized to the extended version POPs, 2-MeL40-S and 3-MeL40-S. In particular, the conductivities of the POPs compete with those of top-level porous organic conductors. Moreover, the activation energy of the POPs is lower than that of the top-performing materials. This study demonstrates that systematic alteration of the electronic effects of substituents is a useful route to improve the conductivity and long-term durability of proton-conducting materials.
我们提出了一种新策略，即通过调节取代基的电子效应来最大化酸性基团的密度，以制备高性能质子导体。带有甲基的磺化1-MeL40-S在80°C和90%相对湿度下的电导率为2.29×10 S cm，相比未磺化的1-MeL40显著提高了22100倍。1-MeL40-S可保持一个月的长期电导率。我们证实这种合成方法可推广到扩展版的多孔有机聚合物（POPs），即2-MeL40-S和3-MeL40-S。特别是，这些POPs的电导率可与顶级多孔有机导体相媲美。此外，POPs的活化能低于性能最佳的材料。这项研究表明，系统改变取代基的电子效应是提高质子传导材料电导率和长期耐久性的有效途径。
