{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T04:37:33Z","timestamp":1792730253289,"version":"4.5.0"},"reference-count":34,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T00:00:00Z","timestamp":1792627200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"},{"start":{"date-parts":[[2026,10,22]],"date-time":"2026-10-22T00:00:00Z","timestamp":1792627200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["chemistry-europe.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Chemistry A European J"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>\n                    A series of ionic liquids (ILs) based on tetrahydrothiophenium (Tht) cations bearing alkyl or ether side chains (containing one to four oxygen atoms), paired with bis(fluorosulfonyl)amide (FSA) or bis(trifluoromethanesulfonyl)amide (TFSA) anions, was synthesized to examine relationships among ether side\u2010chain length, anion structure, and physicochemical properties. All samples showed glass transitions, with glass transition temperature increasing as the ether chain lengthened. Crystallization and melting behavior depended strongly on side\u2010chain length, anion species, and cooling rate. ILs with short ether side chains exhibited low viscosity and ionic conductivity exceeding 10\n                    <jats:sup>\u22123<\/jats:sup>\n                    \u00a0S\u00a0cm\n                    <jats:sup>\u22121<\/jats:sup>\n                    at 25\u00b0C, while longer ether chains led to higher viscosity and lower conductivity, reflecting a trade\u2010off between enhanced conformational flexibility and reduced ionic mobility due to larger cation size. FSA\u2010based ILs generally showed lower viscosity and higher conductivity than TFSA\u2010based analogues. Electrochemical stability also depended on both side\u2010chain length and anion species, though trends differed from those governing ion transport. These results demonstrate that the Tht framework can achieve ionic conductivities on the order of 10\n                    <jats:sup>\u22123<\/jats:sup>\n                    \u00a0S\u00a0cm\n                    <jats:sup>\u22121<\/jats:sup>\n                    , comparable to well\u2010studied pyrrolidinium\u2010based ILs, with short\u2010ether\u2010chain Tht ILs offering favorable transport properties and tunable physicochemical characteristics\u2014useful guidelines for designing high\u2010performance ILs.\n                  <\/jats:p>","DOI":"10.1002\/chem.71819","type":"journal-article","created":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T03:44:36Z","timestamp":1792727076000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Impact of Ether Side\u2010Chain Length and Anion Structure on the Physicochemical and Electrochemical Properties of Tetrahydrothiophenium Ionic Liquids"],"prefix":"10.1002","author":[{"given":"Yoshifumi","family":"Hirotsu","sequence":"first","affiliation":[{"name":"Department of Materials and Life Sciences Sophia University  Chiyoda\u2010ku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yasuyuki","family":"Sugimoto","sequence":"additional","affiliation":[{"name":"Department of Materials and Life Sciences Sophia University  Chiyoda\u2010ku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8269-985X","authenticated-orcid":false,"given":"Masahiro","family":"Yoshizawa\u2010Fujita","sequence":"additional","affiliation":[{"name":"Department of Materials and Life Sciences Sophia University  Chiyoda\u2010ku Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,10,22]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.est.2025.117314"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1007\/s42247\u2010025\u201001284\u20105"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.esci.2021.12.003"},{"key":"e_1_2_8_5_1","doi-asserted-by":"crossref","DOI":"10.1002\/adma.202312451","article-title":"Designing Nonflammable Liquid Electrolytes for Safe Li\u2010Ion Batteries","volume":"37","author":"Xie J.","year":"2025","journal-title":"Advanced 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