Volume 135, Issue 2 e202214301
Forschungsartikel

Electronic Effect-Modulated Enhancements of Proton Conductivity in Porous Organic Polymers

Sun Young Kim

Sun Young Kim

Department of Chemistry, Korea university, Seoul, 02841 Republic of Korea

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Minjung Kang

Minjung Kang

Department of Chemistry, Korea university, Seoul, 02841 Republic of Korea

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Dr. Dong Won Kang

Dr. Dong Won Kang

Department of Chemistry, Korea university, Seoul, 02841 Republic of Korea

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Hyojin Kim

Hyojin Kim

Department of Chemistry, Korea university, Seoul, 02841 Republic of Korea

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Jong Hyeak Choe

Jong Hyeak Choe

Department of Chemistry, Korea university, Seoul, 02841 Republic of Korea

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Hongryeol Yun

Hongryeol Yun

Department of Chemistry, Korea university, Seoul, 02841 Republic of Korea

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Prof. Chang Seop Hong

Corresponding Author

Prof. Chang Seop Hong

Department of Chemistry, Korea university, Seoul, 02841 Republic of Korea

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First published: 11 November 2022

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.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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