{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,27]],"date-time":"2026-10-27T06:26:55Z","timestamp":1793082415213,"version":"4.5.0"},"reference-count":65,"publisher":"American Chemical Society (ACS)","issue":"29","license":[{"start":{"date-parts":[[2026,6,11]],"date-time":"2026-06-11T00:00:00Z","timestamp":1781136000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100007263","name":"Virginia Polytechnic Institute and State University","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100007263","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000146","name":"Division of Chemical, Bioengineering, Environmental, and Transport Systems","doi-asserted-by":"publisher","award":["2208972"],"award-info":[{"award-number":["2208972"]}],"id":[{"id":"10.13039\/100000146","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000146","name":"Division of Chemical, Bioengineering, Environmental, and Transport Systems","doi-asserted-by":"publisher","award":["2323117"],"award-info":[{"award-number":["2323117"]}],"id":[{"id":"10.13039\/100000146","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000146","name":"Division of Chemical, Bioengineering, Environmental, and Transport Systems","doi-asserted-by":"publisher","award":["2342334"],"award-info":[{"award-number":["2342334"]}],"id":[{"id":"10.13039\/100000146","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100011884","name":"Vehicle Technologies Office","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100011884","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Molecular Analysis Core Laboratory, Northern Illinois University","award":["RRID:SCR_024586"],"award-info":[{"award-number":["RRID:SCR_024586"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,7,29]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>The behavior of highly concentrated electrolytes departs radically from the dilute-solution theory, yet the molecular origin of this transformation remains unresolved. Here, we identify the conformational isomerization of molecular ions as a decisive, previously unrecognized control parameter governing structure and transport in crowded aqueous electrolytes. Across a series of fluorosulfonimide anions, we show that increasing concentration drives a collective shift from extended transoid to compact cisoid conformers, revealed by small-angle X-ray scattering, vibrational spectroscopy, pulsed-field gradient NMR, and molecular dynamics simulations. This conformational transition triggers a collapse of the hydrogen-bonded water network and the emergence of densely packed ionic domains with confined water, producing a qualitative change in Li+ transport from solvent-mediated diffusion to network-confined hopping. Anion size and asymmetry systematically tune the onset of this transition, demonstrating that molecular geometry dictates mesoscale organization and dynamics in the ion-rich regime. Our results establish ion conformation, not merely composition or coordination, as a fundamental thermodynamic variable in concentrated solutions, providing a chemical framework that unifies solvation structure and transport in water-in-salt electrolytes and suggesting new principles for designing dense ionic media.<\/jats:p>","DOI":"10.1021\/jacs.6c06055","type":"journal-article","created":{"date-parts":[[2026,6,11]],"date-time":"2026-06-11T04:41:14Z","timestamp":1781152874000},"page":"31011-31019","source":"Crossref","is-referenced-by-count":2,"title":["Conformational\nIsomerization of Imide Anions Governs\nSolvation and Transport in Water-in-Salt Electrolytes"],"prefix":"10.1021","volume":"148","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7965-9742","authenticated-orcid":true,"given":"Huong T.D.","family":"Nguyen","sequence":"first","affiliation":[{"name":"Virginia Tech , , , ,","place":["Blacksburg, Virginia, United States, 24061"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lingzhe","family":"Fang","sequence":"additional","affiliation":[{"name":"Northern Illinois University , , , ,","place":["DeKalb, Illinois, United States, 60115"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6248-7438","authenticated-orcid":true,"given":"Volodymyr","family":"Koverga","sequence":"additional","affiliation":[{"name":"University of Illinois Chicago , , , ,","place":["Chicago, Illinois, United States, 60607"]},{"name":"Argonne National Laboratory , , , ,","place":["Lemont, Illinois, United States, 60439"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lalita","family":"Rai","sequence":"additional","affiliation":[{"name":"Northern Illinois University , , , ,","place":["DeKalb, Illinois, United States, 60115"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mohammed","family":"Lemaalem","sequence":"additional","affiliation":[{"name":"University of Illinois Chicago , , , ,","place":["Chicago, Illinois, United States, 60607"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5781-2486","authenticated-orcid":true,"given":"Xingyi","family":"Lyu","sequence":"additional","affiliation":[{"name":"Northern Illinois University , , , ,","place":["DeKalb, Illinois, United States, 60115"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anh T.","family":"Ngo","sequence":"additional","affiliation":[{"name":"University of Illinois Chicago , , , ,","place":["Chicago, Illinois, United States, 60607"]},{"name":"Argonne National Laboratory , , , ,","place":["Lemont, Illinois, United States, 60439"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4913-4486","authenticated-orcid":true,"given":"Tao","family":"Li","sequence":"additional","affiliation":[{"name":"Virginia Tech , , , ,","place":["Blacksburg, Virginia, United States, 24061"]},{"name":"Argonne National Laboratory , , , ,","place":["Lemont, Illinois, United States, 60439"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2026,6,11]]},"reference":[{"issue":"4","key":"2026073021261130000_cit1","doi-asserted-by":"publisher","first-page":"269","DOI":"10.1038\/s41560-019-0336-z","article-title":"Advances and\nIssues in Developing Salt-Concentrated Battery Electrolytes","volume":"4","author":"Yamada","year":"2019","journal-title":"Nat. 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Raman Spectrosc."},{"issue":"16","key":"2026073021261130000_cit40","doi-asserted-by":"publisher","first-page":"8179","DOI":"10.1021\/jp0612477","article-title":"Conformational Equilibrium\nof Bis(Trifluoromethanesulfonyl)\nImide Anion of a Room-Temperature Ionic Liquid: Raman Spectroscopic\nStudy and DFT Calculations","volume":"110","author":"Fujii","year":"2006","journal-title":"J. Phys. Chem. B"},{"key":"2026073021261130000_cit41","doi-asserted-by":"publisher","DOI":"10.1155\/2015\/176067","article-title":"An Infrared\nSpectroscopy Study of the Conformational\nEvolution of the Bis(Trifluoromethanesulfonyl)Imide Ion in the Liquid\nand in the Glass State","volume":"2015","author":"Palumbo","year":"2015","journal-title":"Adv. Condens. 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