温和条件下多级孔Mg-MOF催化CO_(2)与环氧化物的环加成反应研究

Study on cycloaddition reaction between CO_(2)and epoxides over hierarchical porous Mg-MOF under mild conditions

以镁离子(Mg)为金属中心、富氮多羧基2,4,6-三[(对羧基苯基)氨基]-1,3,5-三嗪(HTATAB)配体为连接器,通过溶剂热法合成了一种新型的多级孔金属有机框架(MOFs)Mg-TATAB,并利用XRD、SEM、XPS、FT-IR和BET等分析手段对其进行结构表征。在常压、无助催化剂和无溶剂的温和条件下有效进行二氧化碳与环氧化物的环加成反应,结果表明,Mg-TATAB对环加成反应具有较高的催化活性和选择性;催化剂重复使用后,选择性下降微小。

Mg-TATAB,a novel kind of hierarchical porous metal organic frameworks(MOFs),is synthesized through solvent thermal method with magnesium ion(Mg)as metal center and 4,4′,4″-((1,3,5-triazine-2,4,6-triyl)tris(azanediyl))tribenzoic acid(HTATAB),a nitrogen-rich polycarboxylic group ligand,as linker.The structure of Mg-TATAB is characterized by means of XRD,SEM,XPS,FTIR and BET,etc.The cycloaddition reaction between epoxide and CO_(2)is effectively performed under mild conditions such as ambient pressure,cocatalyst free and solvent free.Results show that Mg-TATAB shows a high catalytic activity and selectivity for this cycloaddition reaction.In addition,the selectivity of catalyst decreases slightly after it has been reused.