Ultra-fast single-crystal polymerization of large-sized covalent organic frameworks

Lan Peng, Qianying Guo, Chaoyu Song, Samrat Ghosh, Huoshu Xu, Liqian Wang, Dongdong Hu, Lei Shi, Ling Zhao, Qiaowei Li, Tsuneaki Sakurai, Hugen Yan, Shu Seki, Yunqi Liu and Dacheng Wei ()
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Lan Peng: Fudan University
Qianying Guo: Fudan University
Chaoyu Song: Fudan University
Samrat Ghosh: Kyoto University, Nishikyo-ku
Huoshu Xu: Fudan University
Liqian Wang: Fudan University
Dongdong Hu: East China University of Science and Technology
Lei Shi: Fudan University
Ling Zhao: East China University of Science and Technology
Qiaowei Li: Fudan University
Tsuneaki Sakurai: Kyoto University, Nishikyo-ku
Hugen Yan: Fudan University
Shu Seki: Kyoto University, Nishikyo-ku
Yunqi Liu: Fudan University
Dacheng Wei: Fudan University

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract 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 μm-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 2~5 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.

Date: 2021
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DOI: 10.1038/s41467-021-24842-x

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