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

Zhenzhen Yang; Hao Chen; Song Wang; Wei Guo; Tao Wang; Xian Suo; De-En Jiang; Xiang Zhu; Ilja Popovs; Sheng Dai

doi:10.1021/jacs.0c00365

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

J Am Chem Soc. 2020 Apr 15;142(15):6856-6860. doi: 10.1021/jacs.0c00365. Epub 2020 Apr 1.

Authors

Zhenzhen Yang^{1

2}, Hao Chen¹, Song Wang³, Wei Guo¹, Tao Wang¹, Xian Suo¹, De-En Jiang³, Xiang Zhu⁴, Ilja Popovs², Sheng Dai^{1

2}

Affiliations

¹ Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996, United States.
² Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States.
³ Department of Chemistry, University of California, Riverside, California 92521, United States.
⁴ Suzhou Research Institute of Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Suzhou 215123, China.

PMID: 32220210
DOI: 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.