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Titolo:
Three pulse photon echo studies of nondipolar solvation: Comparison with aviscoelastic model
Autore:
Larsen, DS; Ohta, K; Fleming, GR;
Indirizzi:
Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA Univ Calif Berkeley Berkeley CA USA 94720 pt Chem, Berkeley, CA 94720 USA Univ Calif Berkeley, Lawrence Berkeley Lab, Phys Biosci Div, Berkeley, CA 94720 USA Univ Calif Berkeley Berkeley CA USA 94720 sci Div, Berkeley, CA 94720 USA
Titolo Testata:
JOURNAL OF CHEMICAL PHYSICS
fascicolo: 19, volume: 111, anno: 1999,
pagine: 8970 - 8979
SICI:
0021-9606(19991115)111:19<8970:TPPESO>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
VIBRATIONAL POPULATION RELAXATION; SAPPHIRE REGENERATIVE AMPLIFIER; MOLECULAR-DYNAMICS SIMULATION; SHORT-TIME DYNAMICS; NONPOLAR SOLVATION; POLAR SOLVATION; ULTRAFAST SOLVATION; DIPOLAR LIQUIDS; RHODOBACTER-SPHAEROIDES; DIELECTRIC FRICTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
76
Recensione:
Indirizzi per estratti:
Indirizzo: Larsen, DS Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA Univ Calif Berkeley Berkeley CA USA 94720 rkeley, CA 94720 USA
Citazione:
D.S. Larsen et al., "Three pulse photon echo studies of nondipolar solvation: Comparison with aviscoelastic model", J CHEM PHYS, 111(19), 1999, pp. 8970-8979

Abstract

Three pulse stimulated photon echo peak shift (3PEPS) measurements were used to probe the solvation of a quadrupolar solute in three room temperaturenondipolar solvents; benzene, CCl4, and CS2, and the results were comparedwith those for two polar solvents, methanol and acetonitrile, and one weakly polar solvent, toluene. Our data reveal three distinct solvent dynamicaltime scales; a sub-100 fs ultrafast component attributed to inertial motions, a slow (similar to 2-3 ps) component attributed to structural relaxation, and an intermediate time scale (similar to 600 fs) of uncertain origin. The six solvents were chosen to reflect a range of possible interactions, but exhibit similar dynamics, suggesting that similar mechanisms may be at work or that different mechanisms may exist, but occur on similar time scales. A viscoelastic continuum solvation model proposed to describe nonpolar solvation [J. Phys. Chem. A 102, 17 (1998)] was used for a preliminary analysis of our data. (C) 1999 American Institute of Physics. [S0021-9606(99)50643-0].

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Documento generato il 03/07/20 alle ore 00:25:42