Electronic Effect-Modulated Enhancements of Proton Conductivity in Porous Organic Polymers |
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Authors: | Sun Young Kim Minjung Kang Dr. Dong Won Kang Hyojin Kim Jong Hyeak Choe Hongryeol Yun Prof. Chang Seop Hong |
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Affiliation: | Department of Chemistry, Korea university, Seoul, 02841 Republic of Korea |
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Abstract: | 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 2.29×10−1 S cm−1 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. |
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Keywords: | Electronic Effect Long-Term Performance Porous Organic Polymers Proton Conduction |
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