结构基元对多孔芳香骨架气体吸附性能的影响

摘要

We synthesized and characterized two kinds of analogical porous aromatic frameworks by selecting two different building blocks, 1,3,5-tribromobenzene(TBB)and 3,3′,5,5′-terabromo-1,1′-biphenyl (TBBP),catalyzed by Yamamoto type Ullman coupling reaction. The results proved that the properties of the porous aromatic frameworks are similar. Both of them show higher BET surface areas, uniform pore size distributions, excellent stability, and potential applications in gas adsorption and storage. Meanwhile, the differences in specific surface area and gas adsorption between the porous aromatic frameworks can be attributed to the differences between the building blocks.%通过选择2种不同的结构基元:1,3,5-三溴苯(TBB)和3,3′,5,5′-四溴-1,1′-联苯(TBBP),利用Yamamoto型Ullmann偶联反应,制备了2种类似的多孔芳香骨架(PTBB和 PTBBP),并对其进行了结构表征.结果表明,2种多孔芳香骨架在性质上具有一定的相似性,均显示出较高的比表面积、均一的孔径分布以及良好的热稳定性,并且在气体吸附与存储方面有着潜在的应用.由于结构基元本身性质上的差异,导致了两者在比表面积及气体吸附等性质上的差异.