Dipole correlation functions in liquid benzenes measured with terahertz time domain spectroscopy

被引:29
作者
Keiding, SR
机构
[1] Department of Chemistry, University of Aarhus, DK-8000 Aarhus C
关键词
D O I
10.1021/jp970605q
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 report an experimental investigation of the dynamics of the dipole correlation functions in selected liquid benzenes (C6H12, C6H6, C6D6, C6H3F3, and C6F6). Using terahertz time domain spectroscopy, we have measured the complex frequency response, i.e., both index of refraction and absorption, in the range from 0 to 2.5 THz (0 to 83 cm(-1)), where the response is dominated by collective collision-induced processes. We have analyzed the data using the Mori memory function formalism and obtained dipole correlation function dominated by a simple exponential decay for all the substituted benzenes. The observed decay times are shorter than typical reorientation times and proportional to the free rotation time of the molecules. This indicates that small angle librational motion is responsible for the dipolar absorption observed.
引用
收藏
页码:5250 / 5254
页数:5
相关论文
共 30 条
  • [1] CHANG YJ, 1996, PHYS CHEM, V100, P3330
  • [2] CHO M, J CHEM PHYS, V99, P2410
  • [3] ULTRAFAST SOLVENT DYNAMICS - CONNECTION BETWEEN TIME RESOLVED FLUORESCENCE AND OPTICAL KERR MEASUREMENTS
    CHO, MH
    ROSENTHAL, SJ
    SCHERER, NF
    ZIEGLER, LD
    FLEMING, GR
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1992, 96 (07) : 5033 - 5038
  • [4] EVIDENCE FOR THE BREAKDOWN OF THE POINT MULTIPOLE APPROXIMATION FROM FAR-INFRARED STUDIES ON LIQUID FLUORINATED BENZENES
    DELCAMPO, N
    BESNARD, M
    YARWOOD, J
    [J]. CHEMICAL PHYSICS, 1990, 142 (01) : 91 - 95
  • [5] Pulsed terahertz transmission spectroscopy of liquid CHCl3, CCl4, and their mixtures
    Flanders, BN
    Cheville, RA
    Grischkowsky, D
    Scherer, NF
    [J]. JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (29) : 11824 - 11835
  • [6] Fleming GR., 1986, Chemical applications of ultrafast spectroscopy
  • [7] The short-time intramolecular dynamics of solutes in liquids .1. An instantaneous-normal-mode theory for friction
    Goodyear, G
    Stratt, RM
    [J]. JOURNAL OF CHEMICAL PHYSICS, 1996, 105 (22) : 10050 - 10071
  • [8] FAR-INFRARED TIME-DOMAIN SPECTROSCOPY WITH TERAHERTZ BEAMS OF DIELECTRICS AND SEMICONDUCTORS
    GRISCHKOWSKY, D
    KEIDING, S
    VANEXTER, M
    FATTINGER, C
    [J]. JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 1990, 7 (10) : 2006 - 2015
  • [9] SUBPICOSECOND MEASUREMENTS OF POLAR SOLVATION DYNAMICS - COUMARIN-153 REVISITED
    HORNG, ML
    GARDECKI, JA
    PAPAZYAN, A
    MARONCELLI, M
    [J]. JOURNAL OF PHYSICAL CHEMISTRY, 1995, 99 (48) : 17311 - 17337
  • [10] FEMTOSECOND SOLVATION DYNAMICS OF WATER
    JIMENEZ, R
    FLEMING, GR
    KUMAR, PV
    MARONCELLI, M
    [J]. NATURE, 1994, 369 (6480) : 471 - 473