High-pressure-driven multiple-glass transitions of ionic liquids: 1-alkyl-3-methylimidazolium nitrate

被引：1
作者：
Abe, Hiroshi [1 ]
Hirano, Takaaki [1 ]
Kishimura, Hiroaki [1 ]
Takekiyo, Takahiro [2 ]
Yoshimura, Yukihiro [2 ]
机构：
[1] Natl Def Acad, Dept Mat Sci & Engn, Yokosuka 2398686, Japan
[2] Natl Def Acad, Dept Appl Chem, Yokosuka 2398686, Japan
来源：
JOURNAL OF MOLECULAR LIQUIDS | 2024年 / 402卷
关键词：
Ionic liquids; High pressure; Multiple-glass transition; Nanoheterogeneous double glass; X-RAY; AGGREGATION; STATE; WATER;
D O I：
10.1016/j.molliq.2024.124764
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：
Ionic liquids, specifically 1-alkyl-3-methylimidazolium nitrate, [Cnmim][NO3] (n = 4, 6, and 8), underwent pressure-induced amorphization. High-pressure-driven multiple-glass transitions were clarified through Raman spectroscopy. Both double- and triple-glass transitions were observed in [Cnmim][NO3]. Small- and wide-angle X-ray scattering revealed a prepeak representing nanoheterogeneity in [Cnmim][NO3] (n = 6 and 8) at ambient pressure. Despite the decrease in intensity at glass transition pressure, the prepeak of [C8mim][NO3] still existed. In [C8mim][NO3], the first glass-glass transition occurred a nanoheterogeneous double glass. The second glass-glass transition marked the transition from a heterogeneous to a homogeneous glass.
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页数：7
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