Metal-organic frameworks(MOFs)are a novel category of crystalline porous materials,which have become preferred heterogeneous catalysts for many reactions.MOFs are widely used in catalysis because of a com bination of ...Metal-organic frameworks(MOFs)are a novel category of crystalline porous materials,which have become preferred heterogeneous catalysts for many reactions.MOFs are widely used in catalysis because of a com bination of many advantages,such as large pore dimensions and surface area,abundant active sites,and possibility to be designed and modified after synthesis.As an important branch of the MOF family,lantha nide metal-organic frameworks(Ln-MOFs)-comprising a variety of multitopic organic ligands and Ln3+ions/clusters-are a very fascinating MOF materials with complex and diverse topologies.As the functional metal center of MOFs,lanthanide metal ions have a higher coordination number and abundant coordination geometries compared with transition metal ions,which establishes the potential application of Ln-MOFs in thefield of catalysis.In addition,Ln-MOFs have the same characteristics as MOFs,including structural diver sity and tailorability,high surface area,and high thermal and chemical stability;therefore,Ln-MOFs and their derivatives are suitable for heterogeneous catalysis under various conditions.In this review,an overview of the recent developments achieved in Ln-MOF catalysis,including heterogeneous organic catalysis and photocatalysis over Ln-MOFs and their derivative materials,is provided.展开更多
Secondary building units(SBUs)are the key components of metal-organic frameworks(MOFs)that help to build potentially porous periodic networks by linking multitopic organic ligands.Hence,metal SBUs are critical for det...Secondary building units(SBUs)are the key components of metal-organic frameworks(MOFs)that help to build potentially porous periodic networks by linking multitopic organic ligands.Hence,metal SBUs are critical for determining the underlying topology of MOFs.Moreover,SBUs are the main MOF research topic nowadays,because of the simplicity of their synthesis,diverse directionality and their ability to easily harness open metal sites,compared to that of primary building units(comprising mononuclear metal centres)or tertiary building units(metal-organic polyhedra).Therefore,post-synthetic approaches for altering SBUs do not only include developing techniques for controlling the properties of MOFs but also involve a more in-depth understanding of their structure-function relationships from the materials science and engineering perspective.The SBU-related reviews published to date have successfully introduced and organised the chemistry of SBUs in MOFs.Because many recent studies have explored more diverse methods,such as metal exchange,oxidation-state transformation,defect generation,and incorporation of other species,in this review,we mainly focus on the recently developed methods for SBU alteration by classifying them into four groups and elaborate on how unique structures and properties can be achieved using those methods.展开更多
文摘Metal-organic frameworks(MOFs)are a novel category of crystalline porous materials,which have become preferred heterogeneous catalysts for many reactions.MOFs are widely used in catalysis because of a com bination of many advantages,such as large pore dimensions and surface area,abundant active sites,and possibility to be designed and modified after synthesis.As an important branch of the MOF family,lantha nide metal-organic frameworks(Ln-MOFs)-comprising a variety of multitopic organic ligands and Ln3+ions/clusters-are a very fascinating MOF materials with complex and diverse topologies.As the functional metal center of MOFs,lanthanide metal ions have a higher coordination number and abundant coordination geometries compared with transition metal ions,which establishes the potential application of Ln-MOFs in thefield of catalysis.In addition,Ln-MOFs have the same characteristics as MOFs,including structural diver sity and tailorability,high surface area,and high thermal and chemical stability;therefore,Ln-MOFs and their derivatives are suitable for heterogeneous catalysis under various conditions.In this review,an overview of the recent developments achieved in Ln-MOF catalysis,including heterogeneous organic catalysis and photocatalysis over Ln-MOFs and their derivative materials,is provided.
基金supported by the National Research Foundation of Korea(NRF)Grant funded by the Ministry of Science and ICP(No.NRF-2016R1A5A1009405,NRF-2017R1A2B4008757,and NRF-2019R1A6A3A01096867).
文摘Secondary building units(SBUs)are the key components of metal-organic frameworks(MOFs)that help to build potentially porous periodic networks by linking multitopic organic ligands.Hence,metal SBUs are critical for determining the underlying topology of MOFs.Moreover,SBUs are the main MOF research topic nowadays,because of the simplicity of their synthesis,diverse directionality and their ability to easily harness open metal sites,compared to that of primary building units(comprising mononuclear metal centres)or tertiary building units(metal-organic polyhedra).Therefore,post-synthetic approaches for altering SBUs do not only include developing techniques for controlling the properties of MOFs but also involve a more in-depth understanding of their structure-function relationships from the materials science and engineering perspective.The SBU-related reviews published to date have successfully introduced and organised the chemistry of SBUs in MOFs.Because many recent studies have explored more diverse methods,such as metal exchange,oxidation-state transformation,defect generation,and incorporation of other species,in this review,we mainly focus on the recently developed methods for SBU alteration by classifying them into four groups and elaborate on how unique structures and properties can be achieved using those methods.
