Intrinsic proton conduction in 2D sulfonated covalent organic frameworks through a post-synthetic strategy

Yuwei Zhang, Chunzhi Li, Zhaohan Liu, Yuze Yao, Md Mahmudul Hasan, Qianyu Liu, Jieqiong Wan, Zhongping Li*, He Li, Yuki Nagao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

Two-dimensional covalent organic frameworks (2D COFs) have attracted much attention in proton conduction, owing to their regular pore channels and easy functionalization. However, most of the COFs required loading of proton carriers to achieve high proton conductivity. Here, we report the immobilization of flexible sulfonic acid groups on the channel walls of PyTTA-DHTA-COF (synthesized by condensation of 4,4′,4′′,4′′′-(pyrene-1,3,6,8-tetrayl)tetraaniline and 2,5-dihydroxyterephthalaldehyde)viaa simple post-synthetic modification strategy. The sulfonated COF showed intrinsic proton conductivity up to 10−3at 25 °C and 100% relative humidity (RH) and high conductivity up to 10−2S cm−1at 70 °C and 100% RH without the introduction of any non-covalent acid molecules or imidazole derivatives.

Original languageEnglish
Pages (from-to)6234-6238
Number of pages5
JournalCrystEngComm
Volume23
Issue number36
DOIs
Publication statusPublished - 2021 Sept 28
Externally publishedYes

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics

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