期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 -, 期 -, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202004727
关键词
covalent organic frameworks; post-synthesis; proton conduction; stability; sulfonation
资金
- National Key Research and Development Program of China [2017YFA0207500]
- National Natural Science Foundation of China [51973153]
- Natural Science Foundation of Tianjin City [17JCJQJC44600]
This work presents a strategy for exploring proton-conducting frameworks by engineering pore walls and installing proton-containing polymers into the pores. The synthesis of amide-linked and sulfonated frameworks with high crystallinity and channel ordering greatly increases proton conductivity, enabling a stable continuous run. These results suggest a way to explore proton-conducting COFs via systematic engineering of the wall and space of the open nanochannels.
Open 1D channels found in covalent organic frameworks are unique and promising to serve as pathways for proton conduction; how to develop high-rate yet stable transporting systems remains a substantial challenge. Herein, this work reports a strategy for exploring proton-conducting frameworks by engineering pore walls and installing proton-containing polymers into the pores. Amide-linked and sulfonated frameworks were synthesized from imine-linked precursors via sequentially engineering to oxidize into amide linkages and to further anchor sulfonic acid groups onto the pore walls, enabling the creation of sulfonated frameworks with high crystallinity and channel ordering. Integrating sulfonated polyether ether ketone chains into the open channels enables proton hopping to across the channels, greatly increases proton conductivity and enables a stable continuous run. These results suggest a way to explore proton-conducting COFs via systematic engineering of the wall and space of the open nanochannels.
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