Research progress of carbon dioxide conversion catalyzed by metal organic framework materials

It is a long-term challenge for chemists to convert carbon dioxide (CO2) into high value-added chemical products At present, the activation and transformation of CO2 by various homogeneous catalytic systems often need the conditions of high temperature and pressure, and the cost of separation and purification is high Metal organic frameworks (MOFs) are widely used in heterogeneous catalysis in recent years because of their high specific surface area, rich chemical functional groups, metal centers and adjustable channels Recently, Cao Rong, researcher of the State Key Laboratory of structural chemistry of Fujian Institute of material structure, Chinese Academy of Sciences, and Huang yuanbiao, associate researcher, led the MOFs catalytic team, supported by the "973" plan of the Ministry of science and technology, the National Natural Science Foundation project, the strategic leading science and technology project of the Chinese Academy of Sciences, the youth innovation promotion association of the Chinese Academy of Sciences, and the "spring seedling talents" project of the Haixi Research Institute of the Chinese Academy of Sciences, Progress has been made in the heterogeneous catalytic conversion of carbon dioxide by MOFs They used the strategy of imidazole functionalized linear carboxylic acid ligand (im-h2bdc) and Zr ion through the same network synthesis and post synthesis covalent modification (PSM), and prepared the size adjustable nano porous imidazolium ion type catalytic materials The presence of imidazole functional groups in the catalyst can enhance the adsorption of CO2, and the presence of Bronsted acid site (Zr-OH / zr-oh2) and Lewis base iodine ion can realize the synergistic catalysis of olefin epoxide and CO2 to form cyclic carbonate under the condition of no need of any cocatalyst, no solvent and atmospheric pressure This work is expected to provide a new strategy for the preparation of new stable MOF catalytic materials Relevant research results are published in Chemical Science (chem SCI., 2016, DOI: 10.1039 / c6sc04357g) In addition, the research team copolymerized salen (AL) and triazine monomers to prepare ionic mesoporous organic framework compounds with imidazolium salt and salen (AL) in one pot The porous catalyst successfully realized the synergistic catalysis for the reaction of olefin epoxide and CO2 to produce cyclic carbonate (chem Commun., 2016, 52, 13288-13291).