Pressure-Induced Frustration-Frustration Process in 1-Butyl-3-methylimidazolium Hexafluorophosphate, a Room-Temperature Ionic Liquid

被引：35

作者：

Abe, Hiroshi ^{[1
]}

Takekiyo, Takahiro ^{[2
]}

Hatano, Naohiro ^{[2
]}

Shigemi, Machiko ^{[2
]}

Hamaya, Nozomu ^{[3
]}

Yoshimura, Yukihiro ^{[2
]}

机构：

[1] Natl Def Acad, Dept Mat Sci & Engn, Yokosuka, Kanagawa 2398686, Japan

[2] Natl Def Acad, Dept Appl Chem, Yokosuka, Kanagawa 2398686, Japan

[3] Ochanomizu Univ, Grad Sch Humanities & Sci, Bunkyo Ku, Tokyo 1128610, Japan

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2014年 / 118卷 / 04期

关键词：

IN-SITU CRYSTALLIZATION; INITIO CALCULATIONS; X-RAY; DYNAMICS; BENZENE; STATES; GLASS; AMORPHIZATION; CRYSTALS; SILICA;

D O I：

10.1021/jp409924h

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：

We have found that the room-temperature ionic liquid (RTIL) reveals outstanding pressure-induced phase changes from a liquid state to a crystal polymorph and finally to a glass form upon compression by up to 8 GPa. The RTIL is 1-butyl-3-methylimidazolium hexafluorophosphate, [C(4)mim][PF6], which offers the opportunity to investigate a variety of fluctuations in one system and can be completely recovered without dissociation or polymerization, even after decompression. Similar to charge frustration, spin ice-like frustration, and geometric frustration in high potential spintronics/multiferroic materials, the RTIL frustrations are classified into charge (scalar), orientation (vector), and coordination number (topology). Degrees of freedom at each state of [C(4)mim][PF6] are described by charge balancing, molecular orientational order/disorder, molecular conformations of the C(4)miin(+) cation, and the coordination number. Here, we show a novel "conformation glass" induced by high pressure.

引用

页码：1138 / 1145

页数：8

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