A Transformation Strategy for Highly Crystalline Covalent Triazine Frameworks: from Staggered AB to Eclipsed AA Stacking,Journal of the American Chemical Society

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A Transformation Strategy for Highly Crystalline Covalent Triazine Frameworks: from Staggered AB to Eclipsed AA Stacking
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2020-03-27 , DOI: 10.1021/jacs.0c00365
Zhenzhen Yang _{1,

2} , Hao Chen ₁ , Song Wang ₃ , Wei Guo ₁ , Tao Wang ₁ , Xian Suo ₁ , De-en Jiang ₃ , Xiang Zhu ₄ , Ilja Popovs ₂ , Sheng Dai _{1,

2}

Affiliation

Fabrication of crystalline covalent triazine frameworks (CTFs) under mild conditions without induction of carbonization is a long-term challenging subject. Herein, a tandem transfor-mation strategy was demonstrated for the preparation of highly crystalline CTFs with high surface areas under mild, 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 ex-tended to the production of crystalline fluorinated CTFs with controllable fluorine content. This finding unlocks opportunities to design crystalline CTFs with tunable photoelectric properties.

中文翻译：

高结晶共价三嗪框架的转化策略：从交错 AB 到 Eclipsed AA 堆叠

在温和条件下制备结晶共价三嗪骨架 (CTF) 而不诱导碳化是一个长期具有挑战性的课题。在此，展示了一种串联转化策略，用于在温和、无金属和无溶剂的条件下制备具有高表面积的高结晶 CTF。在催化量的超强酸存在下，在 250 C 下获得的具有交错 AB 堆积顺序的 CTF-1（橙色粉末）转变为高度结晶的 CTF-1，其 AA 堆积顺序（绿色粉末）和表面积为 646 m2 g-1 通过在 350 C 下在氮气下退火。该策略可以扩展到生产氟含量可控的结晶氟化 CTF。这一发现为设计具有可调光电特性的晶体 CTF 提供了机会。

更新日期：2020-03-27

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