From LCST to crystals: structural modulation of ionic liquids drives the phase transition of poly(2-isopropyl-2-oxazoline)†

IF 4.2 2区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY Chemical Communications Pub Date : 2025-04-10 DOI:10.1039/D5CC01017A
Mai Kamiyama-Ueda, Takeshi Ueki, Yuji Kamiyama, Ryota Tamate, Keisuke Watanabe and Yukiteru Katsumoto
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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.

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从 LCST 到晶体:离子液体的结构调整推动了聚(2-异丙基-2-噁唑啉)的相变
聚(2-异丙基氯唑啉)(PiPrOx)在离子液体(IL)中表现出UCST-或lst -型相变,这取决于IL的结构。在lcst型液体中,低溶液熵是有利的,PiPrOx在相分离后立即结晶,这与在水中不同。FT-IR显示了具有结构约束的富反式构象,有利于lcst型相分离和快速结晶。
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来源期刊
Chemical Communications
Chemical Communications 化学-化学综合
CiteScore
8.60
自引率
4.10%
发文量
2705
审稿时长
1.4 months
期刊介绍: ChemComm (Chemical Communications) is renowned as the fastest publisher of articles providing information on new avenues of research, drawn from all the world''s major areas of chemical research.
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