Investigation of the effect of pore size on gas uptake in two metal-organic frameworks.
Two porous metal–organic frameworks (1 and 2) with a fsc topology based on mixed ligands have been assembled and characterized. The different pillared ligands (pyrazine for 1 and 4,4′-bipyridine for 2) significantly influence the pore size of the frameworks. Gas uptake measurements reveal that complex 1 possesses higher H2, CO2, and CH4 uptake capacities than 2, although the surface area of 1 is lower than that of complex 2. These results further experimentally prove that the pore size plays an important role in gas uptake in porous MOFs, and the slit pore with a size of ~6 Å exhibits stronger interactions with gas molecules.
State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), College of Science, China University of Petroleum (East China), Qingdao, Shandong 266580, People's Republic of China. dfsun@upc.edu.cn wyguo@upc.edu.cn.
Rongming
R
Wang
Qingguo
Q
Meng
Liangliang
L
Zhang
Haifeng
H
Wang
Fangna
F
Dai
Wenyue
W
Guo
Lianming
L
Zhao
Daofeng
D
Sun
D000327:Adsorption; D002245:Carbon Dioxide / Q000737:chemistry; D018360:Crystallography, X-Ray; D005740:Gases / Q000737:chemistry*; D006859:Hydrogen / Q000737:chemistry; D008024:Ligands; D008670:Metals / Q000737:chemistry*; D008697:Methane / Q000737:chemistry; D008968:Molecular Conformation; D009930:Organic Chemicals / Q000737:chemistry*; D016062:Porosity; D011719:Pyrazines / Q000737:chemistry; D011725:Pyridines / Q000737:chemistry
D005740:Gases; D008024:Ligands; D008670:Metals; D009930:Organic Chemicals; D011719:Pyrazines; D011725:Pyridines; D002245:Carbon Dioxide; D006859:Hydrogen; D008697:Methane; C034306:4,4'-bipyridyl