Selective Gas Adsorption in a Pair of Robust Isostructural MOFs Differing in Framework Charge and Anion Loading
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https://figshare.com/articles/dataset/Selective_Gas_Adsorption_in_a_Pair_of_Robust_Isostructural_MOFs_Differing_in_Framework_Charge_and_Anion_Loading/2234665
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资源简介：
Activation
of the secondary assembly instructions in the mononuclear pyrazine
imide complexes [CoIII(dpzca)2](BF4) or [CoII(dpzca)2] and [NiII(dpzca)2] has facilitated the construction of two robust nanoporous
three-dimensional coordination polymers, [CoIII(dpzca)2Ag](BF4)2·2(H2O) [1·2(H2O)] and [NiII(dpzca)2Ag]BF4·0.5(acetone) [2·0.5(acetone)].
Despite the difference in charge distribution and anion loading, the
framework structures of 1·2(H2O) and 2·0.5(acetone) are isostructural. One dimensional channels
along the b-axis permeate the structures and contain
the tetrafluoroborate counterions (the CoIII-based MOF
has twice as many BF4– anions as the
NiII-based MOF) and guest solvent molecules. These anions
are not readily exchanged whereas the solvent molecules can be reversibly
removed and replaced. The H2, N2, CO2, CH4, H2O, CH3OH, and CH3CN sorption behaviors of the evacuated frameworks 1 and 2 at 298 K have been studied, and modeled, and both show very
high selectivity for CO2 over N2. The increased
anion loading in the channels of CoIII-based MOF 1 relative to NiII-based MOF 2 results
in increased selectivity for CO2 over N2 but
a decrease in the sorption kinetics and storage capacity of the framework.
创建时间：
2016-02-16
