{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,29]],"date-time":"2026-10-29T02:54:12Z","timestamp":1793242452888,"version":"4.5.0"},"reference-count":29,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2024,10,31]],"date-time":"2024-10-31T00:00:00Z","timestamp":1730332800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004837","name":"Ministerio de Ciencia e Innovaci\u00f3n","doi-asserted-by":"publisher","award":["PID 2021-124734OB-C21"],"award-info":[{"award-number":["PID 2021-124734OB-C21"]}],"id":[{"id":"10.13039\/501100004837","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100010067","name":"Gobierno de Arag\u00f3n","doi-asserted-by":"publisher","award":["E11-23R and E12-23R"],"award-info":[{"award-number":["E11-23R and E12-23R"]}],"id":[{"id":"10.13039\/501100010067","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100014013","name":"UK Research and Innovation","doi-asserted-by":"publisher","award":["EPSRC (EP\/V010573\/1)"],"award-info":[{"award-number":["EPSRC (EP\/V010573\/1)"]}],"id":[{"id":"10.13039\/100014013","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Chem."],"abstract":"<jats:p>The reaction of MnCl<jats:sub>2<\/jats:sub>\u00b74H<jats:sub>2<\/jats:sub>O with HL ((1-methyl-1H-imidazol-2-yl)methanol) and pdH<jats:sub>2<\/jats:sub> (1, 3 propanediol) in a basic MeCN solution results in the formation of a mixed-valence [Mn<jats:sub>20<\/jats:sub>] cationic cluster and two [Mn<jats:sup>II<\/jats:sup>Cl<jats:sub>4<\/jats:sub>] counter anions. The metallic skeleton of the cluster describes two geometrically equivalent mixed-valent, linked [Mn<jats:sup>III<\/jats:sup><jats:sub>6<\/jats:sub>Mn<jats:sup>II<\/jats:sup><jats:sub>4<\/jats:sub>] supertetrahedra in which nearest-neighbor metal ions have a different oxidation state. Magnetic susceptibility, magnetization data and heat capacity measurements support evidence of predominant ferromagnetic correlations, leading to a <jats:italic>s<\/jats:italic> = 22 spin ground state for the [Mn<jats:sup>III<\/jats:sup><jats:sub>6<\/jats:sub>Mn<jats:sup>II<\/jats:sup><jats:sub>4<\/jats:sub>] supertetrahedra, which are pair-linked by a weak antiferromagnetic coupling. The properties are discussed in the context of the magnetocaloric effect and the potential application of this compound in cryogenic refrigeration.<\/jats:p>","DOI":"10.3389\/fchem.2024.1494609","type":"journal-article","created":{"date-parts":[[2024,11,2]],"date-time":"2024-11-02T20:36:38Z","timestamp":1730579798000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":10,"title":["Magnetocaloric effect in a high-spin ferromagnetic molecular cluster"],"prefix":"10.3389","volume":"12","author":[{"given":"Eleftheria","family":"Agapaki","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Emmanouil K.","family":"Charkiolakis","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gary S.","family":"Nichol","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David","family":"Gracia","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marco","family":"Evangelisti","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Euan K.","family":"Brechin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1965","published-online":{"date-parts":[[2024,10,31]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"3468","DOI":"10.1063\/1.1737468","article-title":"Engineering molecular rings for magnetocaloric effect","volume":"84","author":"Affronte","year":"2004","journal-title":"Appl. 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