{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,9]],"date-time":"2026-04-09T15:00:53Z","timestamp":1775746853611,"version":"3.50.1"},"reference-count":43,"publisher":"Wiley","issue":"72","license":[{"start":{"date-parts":[[2025,11,24]],"date-time":"2025-11-24T00:00:00Z","timestamp":1763942400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"},{"start":{"date-parts":[[2025,11,24]],"date-time":"2025-11-24T00:00:00Z","timestamp":1763942400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["JP25H01683"],"award-info":[{"award-number":["JP25H01683"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["JP23K26672"],"award-info":[{"award-number":["JP23K26672"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["JP23K13767"],"award-info":[{"award-number":["JP23K13767"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001691","name":"Japan Society for the Promotion of Science","doi-asserted-by":"publisher","award":["JP25K18052"],"award-info":[{"award-number":["JP25K18052"]}],"id":[{"id":"10.13039\/501100001691","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["chemistry-europe.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Chemistry A European J"],"published-print":{"date-parts":[[2025,12,23]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    Despite extensive research on hydrogen\u2010bonded frameworks, cobalt\u2010based coordination complexes with biimidazole ligands remain largely unexplored, and their potential as proton\u2010conducting materials has not been comprehensively investigated. Therefore, this paper reports the synthesis, crystal structures, and proton conduction properties of novel hydrogen\u2010bonded cobalt(II\/III) coordination complexes incorporating 2,2\u2032\u2010biimidazole (H\n                    <jats:sub>2<\/jats:sub>\n                    bim) and 4\u2032\u2010carboxyl\u20102,2\u2032:6\u2032,2\u2033\u2010terpyridine (COOH\u2010terpy) ligands. Two supramolecular architectures were obtained via ligand exchange reactions in methanol: a hydrogen\u2010bonded hexamer, {Co\n                    <jats:sup>III<\/jats:sup>\n                    (COO\u2010terpy)(H\n                    <jats:sub>2<\/jats:sub>\n                    bim)(SCN)}\n                    <jats:sub>6<\/jats:sub>\n                    ([\n                    <jats:bold>1<\/jats:bold>\n                    ]\n                    <jats:sub>6<\/jats:sub>\n                    ), and a mixed\u2010valence 1D hydrogen\u2010bonded chain, {[Co\n                    <jats:sup>II<\/jats:sup>\n                    (COO\u2010terpy)(H\n                    <jats:sub>2<\/jats:sub>\n                    bim)(NCS)][Co\n                    <jats:sup>III<\/jats:sup>\n                    (COO\u2010terpy)(H\n                    <jats:sub>2<\/jats:sub>\n                    bim)(SCN)]}\n                    <jats:sub>n<\/jats:sub>\n                    ([\n                    <jats:bold>2<\/jats:bold>\n                    ]\n                    <jats:sub>n<\/jats:sub>\n                    ). Single\u2010crystal X\u2010ray diffraction revealed that both structures feature extensive hydrogen\u2010bonding networks involving carboxylate and H\n                    <jats:sub>2<\/jats:sub>\n                    bim ligands, leading to unique porous architectures with 1D channels accommodating lattice solvents. Thermogravimetric and variable\u2010temperature powder X\u2010ray diffraction analyses demonstrated the thermal stability and reversible hydration behavior of [\n                    <jats:bold>1<\/jats:bold>\n                    ]\n                    <jats:sub>6<\/jats:sub>\n                    . AC impedance measurements under 100% relative humidity revealed high proton conductivity in [\n                    <jats:bold>1<\/jats:bold>\n                    ]\n                    <jats:sub>6<\/jats:sub>\n                    , reaching 1.0 \u00d7 10\n                    <jats:sup>\u22122<\/jats:sup>\n                    S cm\n                    <jats:sup>\u22121<\/jats:sup>\n                    at 358 K, attributable to proton transport facilitated by hydrogen\u2010bonded networks and lattice water molecules. Activation energy analysis suggested a vehicle mechanism for proton conduction. Overall, this study highlights the potential of hydrogen\u2010bonded cobalt complexes incorporating biimidazole ligands as promising proton\u2010conducting materials with tunable supramolecular architectures.\n                  <\/jats:p>","DOI":"10.1002\/chem.202502896","type":"journal-article","created":{"date-parts":[[2025,11,24]],"date-time":"2025-11-24T18:13:33Z","timestamp":1764008013000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Proton Conductive Supramolecular Architectures Based on a Cobalt Terpyridine\u2013Biimidazole Complex: Hydrogen\u2010Bonded Hexamer and Mixed\u2010Valence 1D Chain"],"prefix":"10.1002","volume":"31","author":[{"given":"Naoki","family":"Takimoto","sequence":"first","affiliation":[{"name":"Department of Chemistry Faculty of Science Tokyo University of Science  Tokyo 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