富含氮氧杂原子的共价嗪基框架的合成和结构

Synthesis and characterization of a new covalent triazine frameworks rich in nitrogen and oxygen heteroatoms

为了获得一种新型富含氮氧杂原子的共价嗪基框架,以富含氮、氧杂原子的2,4,6-三苯氧基-1,3,5-三嗪和三聚氯氰为单体,通过傅克反应合成了这种聚合物(CTFO);IR、XPS证实了三聚氯氰在2,4,6-三苯氧基-1,3,5-三嗪的苯氧基对位上发生缩聚,形成三连接的片层状框架结构;XRD、HRTEM测试结合结构拟合表明了CTFO的AB堆叠多孔层状结构,孔径为0.52 nm;氮气吸附测试证实了CTFO中存在0.5 nm的微孔和堆积形成的24.14 nm的介孔,比表面积为87 m^(2)/g,孔容为0.47 cm^(3)/g;热重分析表明了CTFO在低于450℃下具有良好的热稳定性。

A new covalent triazine framework with abundant nitrogen and oxygen heteroatoms,named as CTFO,was synthesized through Friedel-Crafts alkylation reaction using 2,4,6-phenoxyl-1,3,5-triazine and cyanuric chloride as the monomers.IR and XPS measurements verified that cyanuric groups connected to the paraposition of the phenoxyl groups on the 2,4,6-phenoxyl-1,3,5-triazine to form a three-connected porous sheet structure.XRD and HRTEM characterizations confirmed the AB stacking style of the three-connected sheet through interlayerπ-πinteraction with 0.52 nm micropores.N^(2)adsorption-desorption isotherm confirmed the presence of 0.5 nm micropores and 24.14 nm mesopores with pore volume of 0.47 cm^(3)/g and surface area of 87 m^(2)/g.TG analysis revealed the thermal stability below 450℃.