The first observation of low-frequency Raman spectra of supercritical water

被引：4

作者：

Tominaga, Y ^{[1
]}

Amo, Y

机构：

[1] Ochanomizu Univ, Dept Chem & Phys, Tokyo 1128610, Japan

[2] Yamagata Univ, Dept Mat & Biol Chem, Yamagata 9908560, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2006年 / 75卷 / 02期

关键词：

supercritical water; relaxation; low-frequency; Raman;

D O I：

10.1143/JPSJ.75.023801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Low-frequency Raman spectra of liquid water from -250 to 250 cm(-1) towards to and above the supercritical point have been observed and analyzed by using the multiple random telegraph model (MRT) relaxation function. The 180 cm(-1) band has vanished with increasing temperature with constant pressure at 25 MPa. This is due to the destruction of hydrogen-bonds. The obtained relaxation time first decreases and then increases from about 260 degrees C (433K) with increasing temperature toward to the supercritical state. This behavior is consistent with that of the dielectric relaxation time.

引用

页数：3

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