Effect of pore structures on selective gas sorption behavior of ultramicroporous MOFs
Microporous and Mesoporous Materials(2012)
摘要
Synthesis, crystal structures and selective gas sorption properties of two new MOFs based on pyrimidyl-5-carboxylate (pmc) are reported. [Co3Cl4(pmc)2(CH3OH)4] (1) possesses pillared layer-type network and narrow one-dimensional channels. In [Fe3(O)(pmc)5.3(O2CH)0.7]·DMF (2), the trinuclear basic carboxylate units form a uninodal 5-connected network with isolated cage-like pores. 1 Shows the selective sorption of hydrogen against nitrogen at 77K and CO2 against CH4 at 195K. For 2, a selective sorption is observed only at 77K, and the sorption is almost indiscriminate at 195K. This difference is believed to originate from the different pore structures of 1 and 2.
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关键词
Metal–organic framework,Coordination polymer,Crystal structure,Selective sorption,Adsorption isotherm
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