- By:
- Yang, Zhenzhen ; Chen, Hao; Wang, Song; Guo, Wei ; Wang, Tao ; Suo, Xian; Jiang, De-en; Zhu, Xiang; Dai, Sheng ; Popovs, Ilja
- Journal Name:
- Journal of the American Chemical Society
- Page Number:
- 6856-6860
- Volume:
- 142
- Issue Number:
- 15
- Publication Date:
- December 27, 2023
- View DOI Listing:
- https://doi.org/10.1021/jacs.0c00365
Abstract
Fabrication of crystalline covalent triazine frameworks (CTFs) under mild conditions without introduction of carbonization is a long-term challenging subject. Herein, a tandem transformation strategy was demonstrated for the preparation of highly crystalline CTFs with high surface areas under mild and metal- and solvent-free conditions. CTF-1 with a staggered AB stacking order (orange powder) obtained in the presence of a catalytic amount of superacid at 250 °C was transformed to highly crystalline CTF-1 with an eclipsed AA stacking order (greenish powder) and surface area of 646 m2 g–1 through annealing at 350 °C under nitrogen. The strategy can be extended to the production of crystalline fluorinated CTFs with controllable fluorine content. This finding unlocks opportunities to design crystalline CTFs with tunable photoelectric properties.
