Chen Tao, Li Wen-Qian, Hu Wei-Bo, Hu Wen-Jing, Liu Yahu A, Yang Hui, Wen Ke
Shanghai Advanced Research Institute, Chinese Academy of Sciences Shanghai 201210 P. R. China
University of Chinese Academy of Sciences Beijing 100049 P. R. China.
RSC Adv. 2019 Jun 7;9(31):18008-18012. doi: 10.1039/c9ra02934f. eCollection 2019 Jun 4.
Despite extensive efforts, only three main strategies have been developed to synthesize covalent triazine-based frameworks (CTFs) thus far. We report herein a totally new synthetic strategy which allows C-C bonds in the CTFs to be formed through aromatic nucleophilic substitution reactions. The as-synthesized CTF-1 and CTF-2 exhibited photocatalytic water splitting activity comparable to the CTFs made using ionothermal or Brønsted acid-catalyzed polymerization. Interestingly, CTF-2 distinguished itself by its two-photon fluorescence (emission at ∼530 nm under irradiation at either 400 nm or 800 nm).
尽管付出了巨大努力，但迄今为止，仅开发出三种主要策略来合成共价三嗪基框架（CTF）。我们在此报告一种全新的合成策略，该策略可通过芳香亲核取代反应在CTF中形成C-C键。合成的CTF-1和CTF-2表现出的光催化水分解活性与使用离子热或布朗斯特酸催化聚合制备的CTF相当。有趣的是，CTF-2因其双光子荧光（在400nm或800nm照射下在~530nm处发射）而脱颖而出。
