{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,14]],"date-time":"2026-08-14T08:34:37Z","timestamp":1786696477998,"version":"build-2736575974"},"reference-count":55,"publisher":"Wiley","issue":"15","license":[{"start":{"date-parts":[[2026,8,5]],"date-time":"2026-08-05T00:00:00Z","timestamp":1785888000000},"content-version":"vor","delay-in-days":4,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,8,1]],"date-time":"2026-08-01T00:00:00Z","timestamp":1785542400000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"funder":[{"DOI":"10.13039\/501100001843","name":"Science and Engineering Research Board","doi-asserted-by":"publisher","award":["SERB\/F\/8533\/2015\u201016"],"award-info":[{"award-number":["SERB\/F\/8533\/2015\u201016"]}],"id":[{"id":"10.13039\/501100001843","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000964","name":"Arthritis National Research Foundation","doi-asserted-by":"publisher","award":["ANRF\/IRG\/2024\/001648\/CS"],"award-info":[{"award-number":["ANRF\/IRG\/2024\/001648\/CS"]}],"id":[{"id":"10.13039\/100000964","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["aces.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Chemistry \u0097 An Asian Journal"],"published-print":{"date-parts":[[2026,8]]},"abstract":"ABSTRACT<\/jats:title>\n \n Four new salicylaldehyde,\n o<\/jats:italic>\n \u2010vanillin, 5\u2010nitrosalicylaldehyde and benzaldehyde derived Schiff base ionic liquids (ILs) with bromide counterion (\n IL\u2010Sal<\/jats:bold>\n ,\n IL<\/jats:bold>\n \u2010\n Van<\/jats:bold>\n ,\n IL\u2010NSal,<\/jats:bold>\n and\n IL<\/jats:bold>\n \u2010\n Bz<\/jats:bold>\n ) have been facilely synthesized. The co\u2010existing phenolic\u2010OH and counteranion, Br\n \u2212<\/jats:sup>\n in\n IL\u2010Sal<\/jats:bold>\n ,\n IL\u2010Van<\/jats:bold>\n , and\n IL\u2010NSal<\/jats:bold>\n are employed as bifunctional organocatalysts for epoxide\u2010CO\n 2<\/jats:sub>\n coupling reaction, where \u2010OH activates the epoxide via hydrogen bonding and Br\n \u2212<\/jats:sup>\n promotes ring opening. Experimental evidence from controlled experiments, FT\u2010IR and NMR spectroscopy corroborates a catalytic mechanism involving catalyst\u2010epoxide hydrogen bonding. A control experiment using\n IL\u2010Bz<\/jats:bold>\n , lacking phenolic\u2010OH, shows inferior activity compared to\n IL\u2010Sal<\/jats:bold>\n [cf. substrate: butyl glycidyl ether; conversion: 9% (cat.\n IL\u2010Bz<\/jats:bold>\n ); 90% (cat.\n IL\u2010Sal<\/jats:bold>\n )], confirming the crucial role of \u2010OH as HBD in epoxide activation. Further, NMR spectroscopic investigation reveals H\u2010bonding via downfield shifts with slightly reduced intensity, supported by FT\u2010IR through shifting of the O\u2010H stretching band. Kinetic studies indicate first\u2010order kinetics with rate constants of 1.2 \u00d7 10\n \u22125<\/jats:sup>\n s\n \u22121<\/jats:sup>\n , 2.2 \u00d7 10\n \u22125<\/jats:sup>\n s\n \u22121<\/jats:sup>\n and 2.7 \u00d7 10\n \u22125<\/jats:sup>\n s\n \u2212<\/jats:sup>\n 1<\/jats:sup>\n at 40\u00b0C, 60\u00b0C, and 80\u00b0C, respectively. Activation parameters are \u0394\n H<\/jats:italic>\n #<\/jats:sup>\n = 7.50 \u00b1 0.40 kJ\u00b7mol\n \u22121<\/jats:sup>\n and \u0394\n S<\/jats:italic>\n #<\/jats:sup>\n = \u2212244.5 \u00b1 1.21 J\u00b7mol\n \u22121<\/jats:sup>\n \u00b7K\n \u22121<\/jats:sup>\n . The catalyst also shows good recyclability with conversions of 94%, 89%, and 85% in three consecutive cycles.\n <\/jats:p>","DOI":"10.1002\/asia.70915","type":"journal-article","created":{"date-parts":[[2026,8,5]],"date-time":"2026-08-05T11:56:56Z","timestamp":1785931016000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Hydrogen\u2010Bond DonorAssisted Cycloaddition of CO\n 2<\/sub>\n to Epoxides Catalyzed by Schiff Base Derived Ionic Liquids: Catalytic, Mechanistic, and Kinetic Studies"],"prefix":"10.1002","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-7953-2858","authenticated-orcid":false,"given":"Saurav","family":"Paul","sequence":"first","affiliation":[{"name":"Department of Chemistry Gauhati University Guwahati Assam India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Surabhi","family":"Lahkar","sequence":"additional","affiliation":[{"name":"Department of Chemistry 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