KAUST Catalysis Center, Advanced Catalytic Materials, King Abdullah University of Science and Technology , Thuwal 23955, Saudi Arabia.
Catalysis Engineering, Department of Chemical Engineering, Delft University of Technology , Van der Maasweg 9, 2629 HZ Delft, The Netherlands.
Langmuir. 2017 Dec 19;33(50):14278-14285. doi: 10.1021/acs.langmuir.7b02929. Epub 2017 Dec 8.
Covalent triazine frameworks (CTFs) are porous organic materials promising for applications in catalysis and separation due to their high stability, adjustable porosity, and intrinsic nitrogen functionalities. CTFs are prepared by ionothermal trimerization of aromatic nitriles; however, multiple side reactions also occur under synthesis conditions, and their influence on the material properties is still poorly described. Here we report the systematic characterization of nitrogen in CTFs using X-ray photoelectron spectroscopy. With the use of model compounds, we could distinguish several types of nitrogen species. By combining these data with textural properties, we unravel the influence that the reaction temperature, the catalyst, and the monomer structure and composition have on the properties of the resulting CTF materials.
共价三嗪框架（CTFs）是一类多孔有机材料，由于其高稳定性、可调节的孔隙率和内在的氮官能团，在催化和分离领域有应用前景。CTFs 是通过芳香腈的离子热三聚反应制备的；然而，在合成条件下也会发生多种副反应，它们对材料性能的影响仍描述不足。在这里，我们使用 X 射线光电子能谱系统地表征了 CTFs 中的氮。通过使用模型化合物，我们可以区分出几种类型的氮物种。通过将这些数据与结构性质相结合，我们揭示了反应温度、催化剂以及单体结构和组成对所得 CTF 材料性能的影响。
