Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 27, Pages 14875-14880Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202104106
Keywords
covalent organic frameworks; free-standing membranes; proton conduction; surface-initiated polymerization
Categories
Funding
- National Natural Science Foundation of China [51973026]
- Jilin Provincial Education Departments [JJKH20201169KJ]
Ask authors/readers for more resources
In this study, a new type of SCOF membrane was synthesized by surface-initiated condensation polymerization. The thickness of the COF layer could be adjusted by controlling the polymerization time, and free-standing COF membranes were obtained.
As a new class of crystalline porous organic materials, covalent organic frameworks (COFs) have attracted considerable attention for proton conduction owing to their regular channels and tailored functionality. However, most COFs are insoluble and unprocessable, which makes membrane preparation for practical use a challenge. In this study, we used surface-initiated condensation polymerization of a trialdehyde and a phenylenediamine for the synthesis of sulfonic COF (SCOF) coatings. The COF layer thickness could be finely tuned from 10 to 100 nm by controlling the polymerization time. Moreover, free-standing COF membranes were obtained by sacrificing the bridging layer without any decomposition of the COF structure. Benefiting from the abundant sulfonic acid groups in the COF channels, the proton conductivity of the SCOF membrane reached 0.54 S cm(-1) at 80 degrees C in pure water. To our knowledge, this is one of the highest values for a pristine COF membrane in the absence of additional additives.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available