Terahertz spectroscopic study on order-disorder phase transition of nonadecane

被引:7
作者
Tanno, Takenori [1 ]
Asari, Junya [2 ]
Yodokawa, Shinichi [2 ]
Kurabayashi, Toru [2 ]
机构
[1] Akita Univ, Venture Incubat Ctr, Akita 0108502, Japan
[2] Akita Univ, Fac Engn & Resource Sci, Akita 0108502, Japan
关键词
Terahertz spectroscopy; Nonadecane; Paraffin; Order-disorder transition; Rotator phase; CRYSTAL VIBRATIONS; WAVE GENERATION; FREQUENCY; PARAFFINS; PURE;
D O I
10.1016/j.chemphys.2015.08.022
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
Terahertz transmission spectra of nonadecane (C19H40) in the crystalline and rotator phases were measured over the frequency range of 1-5.5 THz. The absorption peak at 2.2 THz, related to intermolecular interaction, was observed only in the crystalline phase. Using the absorbance at this frequency, the transition between the two phases was investigated. A model of the orientational order-disorder transition of the molecule is presented to qualitatively explain the transition rate. (C) 2015 Elsevier B.V. All rights reserved.
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页码:25 / 28
页数:4
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