文献类型：期刊文献

英文题名：Ultra-fast single-crystal polymerization of large-sized covalent organic frameworks

作者：Peng, Lan[1,2];Guo, Qianying[1,2];Song, Chaoyu[3];Ghosh, Samrat[4];Xu, Huoshu[5];Wang, Liqian[1,2];Hu, Dongdong[6];Shi, Lei[3];Zhao, Ling[6];Li, Qiaowei[5];Sakurai, Tsuneaki[4];Yan, Hugen[3];Seki, Shu[4];Liu, Yunqi[2,7];Wei, Dacheng[1,2]

机构：[1]Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai, Peoples R China;[2]Fudan Univ, Inst Mol Mat & Devices, Shanghai, Peoples R China;[3]Fudan Univ, Dept Phys, Shanghai, Peoples R China;[4]Kyoto Univ, Grad Sch Engn, Dept Mol Engn, Nishikyo Ku, Kyoto, Japan;[5]Fudan Univ, Dept Chem, Shanghai, Peoples R China;[6]East China Univ Sci & Technol, Sch Chem Engn, Shanghai, Peoples R China;[7]Chinese Acad Sci, Inst Chem, Beijing, Peoples R China

年份：2021

卷号：12

期号：1

外文期刊名：NATURE COMMUNICATIONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000687672000002)】；

基金：We thank Songhai Xie, Xiali Zhang, Qingsong Wu from Fudan University for their aid in the TEM test. This work was supported by the 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), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB30000000) and Fudan University.

语种：英文

摘要：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.