柱芳烃基多孔聚合物的制备及其吸附性能

将柱[5]芳烃与1,3,5-三乙炔苯(TEB)通过Sonogashira偶联反应制备了一类新型多孔有机聚合物P[5]-TEB,进而通过脱甲基反应对其进行改性得到多羟基的多孔聚合物P[5]OH-TEB,对二者的物理化学性质和吸附性能进行研究。 氮吸附测试表明,羟基的引入使P[5]OH-TEB的比表面积变大,同时引入微孔结构。 染料吸附实验表明,两聚合物对亚甲基蓝吸附过程符合Langmuir模型,P[5]OH-TEB对亚甲基蓝有更大的吸附量;吸附动力学试验表明,吸附过程更符合拟二级动力学模型,属于化学吸附过程,改性之后P[5]OH-TEB有更快的吸附速率;选择性吸附实验表明,羟基引入聚合物后聚合物对阳离子染料的吸附性能提升,对阴离子染料的吸附效果变差。

Synthesis of Pillar[5]arene-Based Porous Organic Polymers and Their Adsorption Properties

A porous organic polymer containing pillar[5]arene and 1,3,5-trirthynylbenze(TEB), namely, P[5]-TEB, was synthesized by Sonogashira cross-coupling reaction, then a novel polyhydroxyl polymer P[5]OH-TEB was obtained by demethylation reaction from the former polymer. The physical and chemical properties as well as adsorption properties of the two porous organic polymers were studied. Nitrogen adsorption test showed that the specific surface area of P[5]OH-TEB increased with the introduction of hydroxyl group, and the microporous structure was also introduced. It was indicated by dye adsorption that the adsorption process of the two polymers for methylene blue was consistent with the Langmuir adsorption equation, from which P[5]OH-TEB had a greater adsorption capacity for methylene blue. The adsorption kinetics test indicated that the adsorption process was more suitable for the pseudo-secondary kinetics model and belonged to the chemical adsorption process and P[5]OH-TEB got a faster adsorption rate after modification. It was showed by selectivity adsorption that the polymer can absorb more cationic dyes and the adsorption was decreased to anionic dye after the introduction of hydroxyl group into the polymer.