Abstract:

Metal-organic frameworks（MOFs） are a class of porous materials formed by self-assembly of metal ions（or clus-ters） with organic ligands^[1] MOFs have extremely developed pore structure,and their specific surface area and pore volume are far superior to other porous materials.The feature of organic/inorganic hybridization has also given infinite structural and functional tunability to MOFs that other materials（such as zeolite and activated carbon,etc.） do not possess^[2].In addition,MOFs have persistent pores and cavitation that remove the guest molecules while the host framework remains intact,which makes MOFs exceptionally chemically and physically stable.Based on these characteristics,MOFs have many applications in many fields^[3-4],such as catalysis^[5],H₂ storage^[6],CO₂ capture^[7],drug delivery^[8],pollutants adsorption^[9],biomedical imaging^[10] and so on.The commercialization of MOFs has become a hot spot.Many applications of MOFs are related to sustainable development and “green materials”,but the synthesis process of MOFs itself also needs to consider sustainability and environ-mental impacts.The environmental challenges facing metal organic chemistry are unique because they link the hazards of metalions and organic ligands,and most of the synthesis process requires a lot of energy.This review mainly introduces the green and sustainable synthesis of metal-organic framework materials,which are mainly divided into four aspects：1）using safer or biocompatible ligands;2）using greener,low-cost metal sources;3）development of green solvents;4）solvent-free synthesis.

Key words: metal organic frameworks, porous materials, green synthesis