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Titolo:
Ultrafast dichroism spectroscopy of anthracene in solution. III. Nonpolar solvation dynamics in benzyl alcohol
Autore:
Zhang, YH; Berg, MA;
Indirizzi:
Univ S Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA Univ S Carolina Columbia SC USA 29208 m & Biochem, Columbia, SC 29208 USA
Titolo Testata:
JOURNAL OF CHEMICAL PHYSICS
fascicolo: 9, volume: 115, anno: 2001,
pagine: 4231 - 4238
SICI:
0021-9606(20010901)115:9<4231:UDSOAI>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
VISCOELASTIC CONTINUUM MODEL; MULTIPLE TIME SCALES; MOLECULAR THEORY; PROPYLENE CARBONATE; ELECTRONIC STATES; LINE SHAPES; RELAXATION; LIQUIDS; FLUIDS; POLAR;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
53
Recensione:
Indirizzi per estratti:
Indirizzo: Berg, MA Univ S Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA UnivS Carolina Columbia SC USA 29208 em, Columbia, SC 29208 USA
Citazione:
Y.H. Zhang e M.A. Berg, "Ultrafast dichroism spectroscopy of anthracene in solution. III. Nonpolar solvation dynamics in benzyl alcohol", J CHEM PHYS, 115(9), 2001, pp. 4231-4238

Abstract

Results on single-wavelength transient hole burning (SW-THB) developed in paper II [J. Chem. Phys. 115, 4223 (2001)] are applied to the dichroism experiments on anthracene in benzyl alcohol reported in paper I [J. Chem. Phys. 115, 4212 (2001)]. The intermediate component of the dichroism decay is assigned to a SW-THB effect caused by nonpolar electronic solvation. The presence of a solvation component in dichroism experiments has not been demonstrated previously. The sparseness of anthracene's electronic spectrum eliminates vibrational dynamics from the solvation measurement. Because data collection is focused on a single dimension, the viscosity dependence of the nonpolar solvation is determined with greater accuracy than in our previous two-dimensional transient hole-burning studies. The solvation time is obtained as a function of viscosity/temperature from 14.4 to 2.7 cP (1-56 degreesC). The times show good agreement with a viscoelastic theory of the diffusive component of nonpolar solvation. Combining the results of this paper with those of paper I allows for comparison of solvation and rotation dynamics within a single system. A correlation between the ratio of diffusive solvation and rotation times and the magnitude of the inertial rotation is suggested. (C) 2001 American Institute of Physics.

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Documento generato il 28/11/20 alle ore 04:39:59