Authors
Guang Zhang, Zelong Qiao, Xiaorui Ren, Zhen Xie, Xi Su, Jun Xu, Dong Wang, Dapeng Cao, Long Chen
Published in
Angewandte Chemie (International ed. in English). Pages e4078759. Aug 14, 2026. Epub Aug 14, 2026.
Abstract
Catecholate-based conjugated metal-organic frameworks (MOFs) have garnered considerable research interest owing to their tunable structures, exceptional stability, outstanding conductivity, and intrinsic porosity. While most reported materials are limited to two-dimensional (2D) architectures, the design and synthesis of new functional ligands remain a critical challenge. In contrast, three-dimensional (3D) catecholate-based MOFs, despite their promising prospect, are still underexplored. Although ionic MOFs have gained recent progress, their functionality remains limited by ligand design constraints. In this work, we report the design and synthesis of an unprecedented catechol-based ionic conjugated 3D ligand-the tetrabenzo[6,f,j,n][1,5,9,13]tetraazacyclohexadecinenickel(II) (Ni(TAAB)) based monomer, and successfully constructed a new ionic 3D electrically conductive MOF (MOF1). Notably, the ionic nature of MOF1 enables facile membrane formation. Conductivity measurements reveal MOF1 exhibits promising semiconductor properties, with electronic absorption spanning across the visible and near-infrared spectra and a bandgap of 1.28 eV. Remarkably, trifluoroacetic acid-doped MOF1 demonstrates an excellent proton conductivity of 0.36 S/m at 97% relative humidity, making it a mixed electronic-proton conductor. This work provides valuable insights into developing 3D conjugated MOFs as multifunctional ionic materials.
PMID:
42599813
Bibliographic data and abstract were imported from PubMed on 15 Aug 2026.
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