Journal
NATURE COMMUNICATIONS
Volume 12, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41467-021-24842-x
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Funding
- National Key R&D Program of China [2021YFE0201400, 2018YFA0703200]
- National Natural Science Foundation of China [51773041, 61890940, 21603038]
- Shanghai Committee of Science and Technology in China [18ZR1404900]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB30000000]
- Fudan University
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This study reveals that supercritical CO2 significantly accelerates single-crystal polymerization, allowing for the production of large-sized, high-quality 2D COF single crystals.
In principle, polymerization tends to produce amorphous or poorly crystalline materials. Efficiently producing high-quality single crystals by polymerization in solvent remains as an unsolved issue in chemistry, especially for covalent organic frameworks (COFs) with highly complex structures. To produce mu m-sized single crystals, the growth time is prolonged to >15 days, far away from the requirements in practical applications. Here, we find supercritical CO2 (sc-CO2) accelerates single-crystal polymerization by 10,000,000 folds, and produces two-dimensional (2D) COF single crystals with size up to 0.2 mm within 2 similar to 5 min. Although it is the fastest single-crystal polymerization, the growth in sc-CO2 leads to not only the largest crystal size of 2D COFs, but also higher quality with improved photoconductivity performance. This work overcomes traditional concept on low efficiency of single-crystal polymerization, and holds great promise for future applications owing to its efficiency, industrial compatibility, environmental friendliness and universality for different crystalline structures and linkage bonds.
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