Multistep phase transition in 1-decyl-3-methylimidazolium nitrate ionic liquid

被引：14
作者：
Abe, Hiroshi [1 ]
Kishimura, Hiroaki [1 ]
机构：
[1] Natl Def Acad, Dept Mat Sci & Engn, Yokosuka, Kanagawa 2398686, Japan
来源：
JOURNAL OF MOLECULAR LIQUIDS | 2022年 / 352卷
关键词：
Ionic liquids; Cooling rate effect; Quasiequilibrium; Long periodic layered structure; Small- and wide-angle X-ray scattering; MOLECULAR-DYNAMICS; 1-BUTYL-3-METHYLIMIDAZOLIUM; 1-ETHYL-3-METHYLIMIDAZOLIUM; WATER; CRYSTALLIZATION; HETEROGENEITIES; AGGREGATION; EQUILIBRIUM; SEGREGATION; MORPHOLOGY;
D O I：
10.1016/j.molliq.2022.118695
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Cooling-rate dependent multistep phase transition of 1-decyl-3-methylimidazolium nitrate ([C10mim] [NO3]) was investigated at low temperature (LT) by conducting simultaneous small- and wide-angle Xray scattering and differential scanning calorimetry (DSC) measurements. Above 9./min (nonequilibrium), crystallization of [C(10)mim][NO3] was suppressed upon cooling, whereas cold crystallization appeared upon heating. At the cooling rate region between 5./min and 8./min (quasiequlibrium), a multistep phase transition was identified on the DSC thermal traces. The Bragg reflection at the lowest scattering angle was located at a different position from that of the prepeak in the liquid state. A long periodic layered structure was formed at LT. (C) 2022 Elsevier B.V. All rights reserved.
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页数：8
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