Spacer-Engineered Ionic Channels in Covalent Organic Framework Membranes toward Ultrafast Proton Transport.
basic_science · Level V
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- Record sourced from PubMed, PMID 36683382.
- Also identified by DOI 10.1002/adma.202211004.
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Abstract
Side-chain engineering of covalent organic frameworks as advanced ion conductors is a critical issue to be explored. Herein, ionic covalent organic framework membranes (iCOFMs) with spacer-engineered ionic channel are de novo designed and prepared. The ionic channels are decorated with side chains comprising spacers having different carbon chain lengths and the -SO<sub>3</sub> H groups at the end. Attributed to the synergistic contribution from the spacers and the -SO<sub>3</sub> H groups, the iCOFM with moderate-length spacer exhibit the highest through-plane proton conductivity of 889 mS cm<sup>-1</sup> at 90 °C.