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Metalo Hydrogen-Bonded Organic Frameworks Constructed by Coordinated Chains for Magnetic and Proton-Conductive Bifunctionality.
- Source :
-
Inorganic chemistry [Inorg Chem] 2024 Sep 04. Date of Electronic Publication: 2024 Sep 04. - Publication Year :
- 2024
- Publisher :
- Ahead of Print
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Abstract
- Metalo hydrogen-bonded organic frameworks (MHOFs) have received growing interest in designing crystalline functional materials. However, reports on bifunctional MHOFs showing magnetic and proton-conductive properties are extremely limited and their design is challenging. Herein, we investigated the magnetic and proton-conductive properties of two sulfonated CoHOF and MnHOF , {M(H <subscript>2</subscript> O) <subscript>2</subscript> (abs) <subscript>2</subscript> } <subscript> n </subscript> (M = Co <superscript>2+</superscript> and Mn <superscript>2+</superscript> , Habs = 4-aminoazobenzene-4'-sulfonic anion), constructed by coordination chains. The supramolecular frameworks sustained by H bonds between -SO <subscript>3</subscript> <superscript>-</superscript> and coordinated water show directional ladder-type H bonds with hydrophilic nanochannels, leading to high proton conduction with exceptionally high conductivity around 10 <superscript>-2</superscript> S cm <superscript>-1</superscript> at 100 °C under 97% relative humidity. In particular, the maximum σ value of CoHOF , 2.11 × 10 <superscript>-2</superscript> S cm <superscript>-1</superscript> , recorded the highest value among the reported proton-conducting materials showing slow magnetic relaxation. Meanwhile, the molecular structure of organosulfonate enables the magnetic isolation of high-spin Co <superscript>2+</superscript> and Mn <superscript>2+</superscript> centers in the frameworks. Magnetic measurements indicated that the MHOFs show field-induced single-ion magnet (SIM) properties, making these compounds rare magnetic-proton-conductive MHOFs. The work provides not only two unique MHOFs with SIM behavior and high proton conduction performance but also avenues for designing stable bifunctional MHOFs via a coordination chain approach.
Details
- Language :
- English
- ISSN :
- 1520-510X
- Database :
- MEDLINE
- Journal :
- Inorganic chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 39229693
- Full Text :
- https://doi.org/10.1021/acs.inorgchem.4c01847