PRESSURE-DEPENDENCE OF THE OH-STRETCH RAMAN-SPECTRA OF SUPERCOOLED WATER

被引:19
作者
KARGER, N
LUDEMANN, HD
SCEATS, MG
机构
[1] UNIV REGENSBURG,INST BIOPHYS & PHYS BIOCHEM,D-93040 REGENSBURG,GERMANY
[2] UNIV SYDNEY,AUSTRALIAN PHOTON CRC,SYDNEY,NSW 2006,AUSTRALIA
来源
BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 1995年 / 99卷 / 09期
关键词
GLASSES; HIGH PRESSURE; LIQUIDS; SPECTROSCOPY; RAMAN;
D O I
10.1002/bbpc.199500040
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
Raman spectra of the OH-stretching region of liquid H2O and 10% H in D2O have been obtained between -50 and +100 degrees C at pressures up to 240 MPa, extending into the deeply supercooled region. Application of pressure made it possible to study liquid water at temperatures 20 K lower than reported so far. The low-frequency shoulder of the H2O-spectra grows rapidly with falling temperature. The relative intensity of the collective band increases monotonically to the lowest temperatures studied. Supercooled water shows a number of thermodynamic and transport anomalies, which become apparent from the unusual p-, T-dependence of the compressibility and the molecular mobility in the pressure range between 0 and 200 MPa. The Raman spectra, however, do not change significanctly in this pressure region. At the lowest temperatures they are practically independent of pressure. This finding suggests that the intensity of the collective Raman band originates from short range correlations of the OH-bond vibrations, that are not identical to the more extended density fluctuations responsible for the well known anomalies of supercooled water.
引用
收藏
页码:1104 / 1109
页数:6
相关论文
共 25 条
[1]  
Angell C. A, 1982, WATER COMPREHENSIVE, V7, P1, DOI DOI 10.1007/978-1-4757-6952-4
[2]  
ANGELL CA, 1983, ANNU REV PHYS CHEM, V34, P543
[3]  
BELISSENTFUNEL MC, 1995, J CHEM PHYS, V102, P3727
[4]  
BELISSENTFUNEL MC, 1995, 12TH P INT C PROP WA
[5]   ENHANCED DENSITY-FLUCTUATIONS IN SUPERCOOLED H2O, D2O, AND ETHANOL-WATER SOLUTIONS - EVIDENCE FROM SMALL-ANGLE X-RAY-SCATTERING [J].
BOSIO, L ;
TEIXEIRA, J ;
STANLEY, HE .
PHYSICAL REVIEW LETTERS, 1981, 46 (09) :597-600
[6]   RAMAN-SCATTERING AND STRUCTURE OF NORMAL AND SUPERCOOLED WATER [J].
DARRIGO, G ;
MAISANO, G ;
MALLAMACE, F ;
MIGLIARDO, P ;
WANDERLINGH, F .
JOURNAL OF CHEMICAL PHYSICS, 1981, 75 (09) :4264-4270
[7]   STRUCTURE OF LIQUID-HYDROGEN FLUORIDE STUDIED BY INFRARED AND RAMAN-SPECTROSCOPY [J].
DESBAT, B ;
VANHUONG, P .
JOURNAL OF CHEMICAL PHYSICS, 1983, 78 (11) :6377-6383
[8]  
GEIGER A, 1989, NATO ACI SERIES C, V329, P171
[9]   SPECTROSCOPIC EVIDENCE FOR SPATIAL CORRELATIONS OF HYDROGEN-BONDS IN LIQUID WATER [J].
GREEN, JL ;
LACEY, AR ;
SCEATS, MG .
JOURNAL OF PHYSICAL CHEMISTRY, 1986, 90 (17) :3958-3964
[10]   COUPLING OF SMALL-AMPLITUDE PROTON MOTIONS IN LIQUID WATER TO DENSITY AND TEMPERATURE [J].
GREEN, JL ;
LACEY, AR ;
SCEATS, MG ;
HENDERSON, SJ ;
SPEEDY, RJ .
JOURNAL OF PHYSICAL CHEMISTRY, 1987, 91 (06) :1684-1686