Abstract A Zn-salen based covalent triazine framework (Zn@CTF) was prepared through ZnCl2 promoted one-pot procedure under ionothermal conditions using salen type precursor N,N′-Bis(5-cyano-salicylidene)-1,2-benzendiamine derived from imine condensation reaction of 3-formyl-4-hydroxybenzonitrile and 1,2-diaminebenzene. The chemical structure of the obtained polymer was characterized by solid-state 13C nuclear magnetic resonance (NMR), fourier transform infrared (FT-IR), energy dispersive spectrometer (EDS) and element analysis. Powder X-ray diffraction (PXRD) and thermogravimetric analysis (TGA) showed that the prepared polymer possessed amorphous structure and good thermal stability. The porous property of the polymer material was also characterized by N2 adsorption/desorption isotherm and the Zn@CTF material exhibited excellent porosity with a Brunauer-Emmett-Teller (BET) surface area of up to 598.2 m2 g−1. The surface microstructure property was evaculated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The CO2 adsorption performance of the Zn@CTF was further investigated and it was found that the CO2 uptake capacity was 43.9 cm3 g−1 at 273 K.

中文翻译：

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基于Zn-salen的共价三嗪框架作为CO 2 捕获的有希望的候选者

摘要 在电离热条件下，采用由氯化锌促进的一锅法制备了基于锌salen的共价三嗪骨架（Zn@CTF），使用salen型前驱体N,N'-双（5-氰基水杨烯）-1,2-苯二胺衍生的N,N'-Bis(5-cyano-salicylidene)-1,2-benzdiamine由 3-甲酰基-4-羟基苄腈和 1,2-二胺苯的亚胺缩合反应生成。所得聚合物的化学结构通过固态13C核磁共振(NMR)、傅里叶变换红外(FT-IR)、能谱仪(EDS)和元素分析进行​​表征。粉末X射线衍射(PXRD)和热重分析(TGA)表明制备的聚合物具有无定形结构和良好的热稳定性。聚合物材料的多孔特性还以 N2 吸附/解吸等温线为特征，Zn@CTF 材料表现出优异的孔隙率，Brunauer-Emmett-Teller (BET) 表面积高达 598.2 m2 g-1。通过扫描电子显微镜（SEM）和透射电子显微镜（TEM）对表面微观结构进行抽真空。进一步研究了 Zn@CTF 的 CO2 吸附性能，发现 CO2 吸收能力在 273 K 时为 43.9 cm3 g-1。