Structure and Intermolecular Dynamics of Liquids: Femtosecond Optical Kerr Effect Measurements in Nonpolar Fluorinated Benzenes

Autor:	Edward L. Quitevis, Manickam Neelakandan, Debi D. Pant
Rok vydání:	1997
Předmět:	chemistry.chemical_compound Kerr effect chemistry Polarizability Molecular vibration Femtosecond Intermolecular force Analytical chemistry Hexafluorobenzene Physical and Theoretical Chemistry Spectroscopy Anisotropy Molecular physics
Zdroj:	The Journal of Physical Chemistry A. 101:2936-2945
ISSN:	1520-5215 1089-5639
DOI:	10.1021/jp964047b
Popis:	A comparative study of the collective polarizability anisotropy dynamics of benzene, 1,3,5-trifluorobenzene, and hexafluorobenzene was carried out by using optical heterodyne-detected Raman-induced Kerr effect spectroscopy (OHD-RIKES) with 45 fs laser pulses. The OHD-RIKES data were analyzed by using a model-dependent approach and a Fourier transform approach, which yields a spectral density for the liquid. From an analysis of the long-time tails, collective reorientation times of 2.45 ± 0.06, 9.05 ± 0.10, and 13.5 ± 0.1 ps were obtained respectively for C6H6, 1,3,5-C6F3H3, and C6F6. The spectral densities are narrower for 1,3,5-C6F3H3 and C6F6 than for C6H6 by roughly a factor of 2. Information about the intermolecular vibrational modes of the liquid is contained in the reduced spectral density which is obtained by subtracting the tail-matched diffusive reorientational response from the OHD-RIKES data. In the case of C6H6 and C6F6, the intermolecular spectral density can be decomposed into at least two b...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::dfc9d1a61107d046cfe000dbe9729124 https://doi.org/10.1021/jp964047b Zobrazit plný text záznamu