Mai Kamiyama-Ueda, Takeshi Ueki, Yuji Kamiyama, Ryota Tamate, Keisuke Watanabe and Yukiteru Katsumoto
{"title":"From LCST to crystals: structural modulation of ionic liquids drives the phase transition of poly(2-isopropyl-2-oxazoline)†","authors":"Mai Kamiyama-Ueda, Takeshi Ueki, Yuji Kamiyama, Ryota Tamate, Keisuke Watanabe and Yukiteru Katsumoto","doi":"10.1039/D5CC01017A","DOIUrl":null,"url":null,"abstract":"<p >Poly(2-isopropyl-2-oxazoline) (PiPrOx) exhibits UCST- or LCST-type phase transitions in ionic liquids (ILs) depending on the IL structure. In LCST-type ILs, where low solution entropy is favorable, PiPrOx crystallizes immediately after phase separation, unlike in water. FT-IR reveals a <em>trans</em>-rich conformation with structural constraint, facilitating both LCST-type phase separation and rapid crystallization.</p>","PeriodicalId":67,"journal":{"name":"Chemical Communications","volume":" 49","pages":" 8843-8846"},"PeriodicalIF":4.2000,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/cc/d5cc01017a?page=search","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Communications","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/cc/d5cc01017a","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Poly(2-isopropyl-2-oxazoline) (PiPrOx) exhibits UCST- or LCST-type phase transitions in ionic liquids (ILs) depending on the IL structure. In LCST-type ILs, where low solution entropy is favorable, PiPrOx crystallizes immediately after phase separation, unlike in water. FT-IR reveals a trans-rich conformation with structural constraint, facilitating both LCST-type phase separation and rapid crystallization.
期刊介绍:
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