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以卟啉作为基本构筑单元,通过偶氮键的链接制备得到基于偶氮链接卟啉的共轭微孔聚合物。通过红外(FT-IR)表征,偶氮键(—NN—)的特征吸收峰(1 597cm-1)证明该材料中大量偶氮键的生成。利用扫描电子显微镜(SEM)和透射电子显微镜(TEM)对其形貌进行分析,发现该材料表面粗糙且具有很明显的孔结构。热重分析(TGA)表明其在N2中具有很好的热稳定性(195℃失重5%)。利用N2、CO2和H2对该材料进行气体吸脱附实验,结果显示该材料的比表面积达到571m2/g;CO2吸附量可达94.2mg/g(273K);H2吸附量可达8.6mg/g(77K)。CO2和H2的吸附焓(ΔH)经计算分别达到37和7kJ/mol。
With porphyrin as the basic building block, azo-linked porphyrin-based conjugated microporous polymers were prepared by linking azo bonds. The characteristic absorption peak (1 597 cm-1) of the azo bond (-NN-) was confirmed by FT-IR. The formation of a large number of azo bonds in this material was confirmed. The morphology of the material was analyzed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and the surface of the material was found to be rough with obvious pore structure. Thermogravimetric analysis (TGA) shows that it has good thermal stability in N2 (5% weight loss at 195 ° C). The gas adsorption and desorption experiments of the material with N2, CO2 and H2 showed that the specific surface area of the material reached 571m2 / g, the CO2 adsorption capacity reached 94.2mg / g (273K), the H2 adsorption capacity reached 8.6mg / g (77K). The enthalpy of adsorption (ΔH) for CO2 and H2 was calculated to be 37 and 7 kJ / mol, respectively.