• DOI:10.1126/science.1192160
• Corpus ID: 25072457

Ultrahigh Porosity in Metal-Organic Frameworks

@article{Furukawa2010UltrahighPI,
  title={Ultrahigh Porosity in Metal-Organic Frameworks},
  author={Hiroyasu Furukawa and Nakeun Ko and Yong Bok Go and Naoki Aratani and Sang Beom Choi and Eunwoo Choi and A. Ozgur Yazaydin and Randall Q. Snurr and Michael O'Keeffe and Jaheon Kim and Omar M. Yaghi},
  journal={Science},
  year={2010},
  volume={329},
  pages={424 - 428}
}

• H. Furukawa, Nakeun Ko, +8 authors O. Yaghi
• Published 23 July 2010
• Chemistry
• Science

Network Approaches to Highly Porous Materials Metal-organic frameworks (MOFs), in which inorganic centers are bridged by organic linkers, can achieve very high porosity for gas absorption. However, as the materials develop larger void spaces, there is also more room for growing interpenetrating networks—filling the open spaces not with gas molecules but with more MOFs. Furukawa et al. (p. 424, published online 1 July) describe the synthesis of a MOF in which zinc centers are bridged with long, highly conjugated organic linkers, but in which the overall symmetry of the networks created prevents formation of interpenetrating networks. Extremely high surface areas and storage capacities for hydrogen, carbon dioxide, and methane were observed. The large surface areas of these materials would correspond to that of dispersed nanocubes just 3 to 6 nanometers wide. Crystalline solids with extended non-interpenetrating three-dimensional crystal structures were synthesized that support well-defined pores with internal diameters of up to 48 angstroms. The Zn4O(CO2)6 unit was joined with either one or two kinds of organic link, 4,4′,4″-[benzene-1,3,5-triyl-tris(ethyne-2,1-diyl)]tribenzoate (BTE), 4,4′,44″-[benzene-1,3,5-triyl-tris(benzene-4,1-diyl)]tribenzoate (BBC), 4,4′,44″-benzene-1,3,5-triyl-tribenzoate (BTB)/2,6-naphthalenedicarboxylate (NDC), and BTE/biphenyl-4,4′-dicarboxylate (BPDC), to give four metal-organic frameworks (MOFs), MOF-180, -200, -205, and -210, respectively. Members of this series of MOFs show exceptional porosities and gas (hydrogen, methane, and carbon dioxide) uptake capacities. For example, MOF-210 has Brunauer-Emmett-Teller and Langmuir surface areas of 6240 and 10,400 square meters per gram, respectively, and a total carbon dioxide storage capacity of 2870 milligrams per gram. The volume-specific internal surface area of MOF-210 (2060 square meters per cubic centimeter) is equivalent to the outer surface of nanoparticles (3-nanometer cubes) and near the ultimate adsorption limit for solid materials.