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- A nd 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.
| Original language | English |
|---|---|
| Pages (from-to) | 6856-6860 |
| Number of pages | 5 |
| Journal | Journal of the American Chemical Society |
| Volume | 142 |
| Issue number | 15 |
| DOIs | |
| State | Published - Apr 15 2020 |
Funding
The research was supported financially by the Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, US Department of Energy. We are thankful for the contribution of Carlos Alberto Steren of ESR measurement and analysis.