pH-Dependent Structural Engineering of Sulfonate-Carboxylate Cu-MOFs for High Proton Conductivity DOI
Shiyu Wei, Tingting Cui, Shunlin Zhang

et al.

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 23, 2025

Metal-organic frameworks (MOFs) with free carboxylic acid (COOH) groups are promising for solid-state proton-conducting materials, owing to the Brønsted acidity, polarity, and hydrogen-bonding ability of COOH groups. In this work, two Cu-MOFs different dimensions were synthesized by adjusting pH reaction solution using disodium-2,2'-disulfonate-4,4'-oxidibenzoic (Na2H2DSOA) 4,4'-bipyridine (4,4'-bpy) as ligands coordinate Cu(II). The resulting compounds, CuDSOA-1 (([Cu(4,4'-bpy)2(H2O)2][Cu(H2DSOA)2(4,4'-bpy)(H2O)2]·12H2O)) CuDSOA-2 ([Cu2(DSOA)(4,4'-bpy)2(H2O)2]·4H2O), have distinct dimensionalities structures, mainly due pH's effect on deprotonation. Notably, abundant groups, uncoordinated sulfonate water molecules shows a significantly enhanced proton conductivity 2.46 × 10-2 S cm-1 at 95 °C 98% RH, surpassing (3.40 10-5 85 RH). mechanism was found be Grotthuss mechanism, confirmed deuterium-hydrogen isotopic effects. This study offers method control coordination sulfonic-carboxylic Cu(II) adjustment, aiming create MOFs ultrahigh conductivity.

Language: Английский

pH-Dependent Structural Engineering of Sulfonate-Carboxylate Cu-MOFs for High Proton Conductivity DOI
Shiyu Wei, Tingting Cui, Shunlin Zhang

et al.

Inorganic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 23, 2025

Metal-organic frameworks (MOFs) with free carboxylic acid (COOH) groups are promising for solid-state proton-conducting materials, owing to the Brønsted acidity, polarity, and hydrogen-bonding ability of COOH groups. In this work, two Cu-MOFs different dimensions were synthesized by adjusting pH reaction solution using disodium-2,2'-disulfonate-4,4'-oxidibenzoic (Na2H2DSOA) 4,4'-bipyridine (4,4'-bpy) as ligands coordinate Cu(II). The resulting compounds, CuDSOA-1 (([Cu(4,4'-bpy)2(H2O)2][Cu(H2DSOA)2(4,4'-bpy)(H2O)2]·12H2O)) CuDSOA-2 ([Cu2(DSOA)(4,4'-bpy)2(H2O)2]·4H2O), have distinct dimensionalities structures, mainly due pH's effect on deprotonation. Notably, abundant groups, uncoordinated sulfonate water molecules shows a significantly enhanced proton conductivity 2.46 × 10-2 S cm-1 at 95 °C 98% RH, surpassing (3.40 10-5 85 RH). mechanism was found be Grotthuss mechanism, confirmed deuterium-hydrogen isotopic effects. This study offers method control coordination sulfonic-carboxylic Cu(II) adjustment, aiming create MOFs ultrahigh conductivity.

Language: Английский

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