title: A Triazole-Containing Metal-Organic Framework as a Highly Effective and Substrate Size-Dependent Catalyst for CO2 Conversion.
abstract: A highly porous metal-organic framework (MOF) incorporating both exposed metal sites and nitrogen-rich triazole groups was successfully constructed via solvothermal assembly of a clicked octcarboxylate ligand and Cu(II) ions, which presents a high affinity toward CO2 molecules clearly verified by gas adsorption and Raman spectral detection. The constructed MOF featuring CO2-adsorbing property and exposed Lewis-acid metal sites could serve as an excellent catalyst for CO2-based chemical fixation. Catalytic activity of the MOF was confirmed by remarkably high efficiency on CO2 cycloaddition with small epoxides. When extending the substrates to larger ones, its activity showed a sharp decrease. These observations reveal that MOF-catalyzed CO2 cycloaddition of small substrates was carried out within the framework, while large ones cannot easily enter into the porous framework for catalytic reactions. Thus, the synthesized MOF exhibits high catalytic selectivity to different substrates on account of the confinement of the pore diameter. The high efficiency and size-dependent selectivity toward small epoxides on catalytic CO2 cycloaddition make this MOF a promising heterogeneous catalyst for carbon fixation.
authors: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, Singapore 637371.|Singapore Peking University Research Centre for a Sustainable Low-Carbon Future , 1 Create Way, Singapore 138602.
authors: Pei-Zhou
authors: PZ
authors: Li
authors: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, Singapore 637371.|Singapore Peking University Research Centre for a Sustainable Low-Carbon Future , 1 Create Way, Singapore 138602.
authors: Xiao-Jun
authors: XJ
authors: Wang
authors: Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Materials Science and Engineering, College of Engineering, Peking University , Beijing 100871, China.|Singapore Peking University Research Centre for a Sustainable Low-Carbon Future , 1 Create Way, Singapore 138602.
authors: Jia
authors: J
authors: Liu
authors: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, Singapore 637371.
authors: Jie Sheng
authors: JS
authors: Lim
authors: Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Materials Science and Engineering, College of Engineering, Peking University , Beijing 100871, China.|Singapore Peking University Research Centre for a Sustainable Low-Carbon Future , 1 Create Way, Singapore 138602.
authors: Ruqiang
authors: R
authors: Zou
authors: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , 21 Nanyang Link, Singapore 637371.|Singapore Peking University Research Centre for a Sustainable Low-Carbon Future , 1 Create Way, Singapore 138602.|School of Materials Science and Engineering, Nanyang Technological University , 50 Nanyang Avenue, 639798, Singapore.
authors: Yanli
authors: Y
authors: Zhao