Transformation Strategy for Highly Crystalline Covalent Triazine Frameworks: From Staggered AB to Eclipsed AA Stacking

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 a...

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Published inJournal of the American Chemical Society Vol. 142; no. 15; pp. 6856 - 6860
Main Authors Yang, Zhenzhen, Chen, Hao, Wang, Song, Guo, Wei, Wang, Tao, Suo, Xian, Jiang, De-en, Zhu, Xiang, Popovs, Ilja, Dai, Sheng
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 15.04.2020
Subjects
annealing
carbonization
catalytic activity
fluorine
nitrogen
surface area
triazines
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Summary: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.
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content type line 23
ISSN:0002-7863
1520-5126
1520-5126
DOI:10.1021/jacs.0c00365