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Long Periodic Structure of a Room-Temperature Ionic Liquid by High-Pressure Small-Angle X-Ray Scattering and Wide-Angle X-Ray Scattering: 1-Decyl-3-Methylimidazolium Chloride

Long Periodic Structure of a Room-Temperature Ionic Liquid by High-Pressure Small-Angle X-Ray Scattering and Wide-Angle X-Ray Scattering: 1-Decyl-3-Methylimidazolium Chloride

Hiroshi Abe, Nozomu Hamaya, Yoshihiro Koyama, Hiroaki Kishimura, Takahiro Takekiyo, Yukihiro Yoshimura, Daisuke Wakabayashi, Nobumasa Funamori, Kiyoto Matsuishi

Chemphyschem. 2018 Jun 19;19(12):1441-1447.

PMID: 29683543

Abstract:

The Bragg reflections of 1-decyl-3-methylimidazolium chloride ([C10 mim][Cl]), a room-temperature ionic liquid, are observed in a lowly scattered wavevector (q) region using high-pressure (HP) small-angle X-ray scattering methods. The HP crystal of [C10 mim][Cl] was characterized by an extremely long periodic structure. The peak position at the lowest q (1.4 nm-1 ) was different from that of the prepeak observed in the liquid state (2.3 nm-1 ). Simultaneously, Bragg reflections at high-q were detected using HP wide-angle X-ray scattering. The longest lattice constant was estimated to be 4.3 nm using structural analysis. The crystal structure of HP differed from that of the low-temperature (LT) crystal and the LT liquid crystal. With increasing pressure, Bragg reflections in the high-q component became much broader, and were accompanied by phase transition, although those in the low-q component were observed to be relatively sharp.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP171058187	1-Decyl-3-methylimidazolium chloride		171058-18-7	Price

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