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<p>A new MOF, {[Fe<sub>15</sub>(µ<sub>3</sub>-O)<sub>5</sub>(L<sup>4−</sup>)<sub>6</sub>(H<sub>2</sub>O)<sub>13</sub>(CH<sub>3</sub>COO)<sub>8</sub>]Cl<sub>3</sub>}n (<b>SYU-3</b>, SYU for Shenyang University, H<sub>4</sub>L = [1,1′:4′,1″-triphenyl]-3,3″,5,5″-tetracarboxylic acid), with (3,3,4,4,4,4,4,4,5,6,7)-connected nets, was synthesized via the combination of H<sub>4</sub>L with FeCl<sub>3</sub>·6H<sub>2</sub>O in <i>N</i>,<i>N</i>-dimethylformamide/acetic acid solvent system. Interestingly, <b>SYU-3</b> is isomorphic to <b>Quin-Fe-TPTC</b>, which is a five-component MOF based on the same metal and ligand and possesses cages and channels in it. However, <b>SYU-3</b> shows a different valence state of iron and was obtained by a one-step reaction without the need to prepare Fe–O clusters in advance. Moreover, <b>SYU-3</b> exhibits high water stability, it also shows 10.4 wt% carbon dioxide adsorption amounts under 298&#xa0;K and 1&#xa0;bar and 84.7 adsorption selectivity of carbon dioxide to nitrogen. Grand canonical Monte Carlo simulations show that both cages and channels provide carbon dioxide binding sites, which may result in the selective carbon dioxide adsorption of <b>SYU-3</b>.</p>

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A new MOF with high water stability and selective CO2 adsorption

  • 期刊论文

  • 发表日期：

    2025年2月17日

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  • Cong Chen

摘要

A new MOF, {[Fe15(µ3-O)5(L4−)6(H2O)13(CH3COO)8]Cl3}n (SYU-3, SYU for Shenyang University, H4L = [1,1′:4′,1″-triphenyl]-3,3″,5,5″-tetracarboxylic acid), with (3,3,4,4,4,4,4,4,5,6,7)-connected nets, was synthesized via the combination of H4L with FeCl3·6H2O in N,N-dimethylformamide/acetic acid solvent system. Interestingly, SYU-3 is isomorphic to Quin-Fe-TPTC, which is a five-component MOF based on the same metal and ligand and possesses cages and channels in it. However, SYU-3 shows a different valence state of iron and was obtained by a one-step reaction without the need to prepare Fe–O clusters in advance. Moreover, SYU-3 exhibits high water stability, it also shows 10.4 wt% carbon dioxide adsorption amounts under 298 K and 1 bar and 84.7 adsorption selectivity of carbon dioxide to nitrogen. Grand canonical Monte Carlo simulations show that both cages and channels provide carbon dioxide binding sites, which may result in the selective carbon dioxide adsorption of SYU-3.