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Proceedings Paper

Mechanical mechanism for the ultrafast perturbation of electronic states in solution
Author(s): Mark A. Berg; John T. Fourkas; Andrea Benigno
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Paper Abstract

The interaction dynamics between a nonpolar solute (dimethyl-s-tetrazine) and a nonpolar solvent (n-butylbenzene) have been explored over a wide temperature range (40 K - 300 K). On the basis of the results, a new model based on mechanical interaction between solute and solvent is proposed. The dynamics consist of two distinct components. A subpicosecond component is linked to the phonon-like motion about the instantaneous liquid structure. The other component is related to structural reorganization of the solvent. The time scale of the structural dynamics is identical to the shear relaxation time of the solvent. A model in which the solvent responds as a viscoelastic continuum to the difference in size and shape of the solute in the ground and excited states is presented. It accounts for the existence and time scales of both solvation components.

Paper Details

Date Published: 17 June 1994
PDF: 10 pages
Proc. SPIE 2124, Laser Techniques for State-Selected and State-to-State Chemistry II, (17 June 1994); doi: 10.1117/12.178117
Show Author Affiliations
Mark A. Berg, Univ. of Texas/Austin (United States)
John T. Fourkas, Univ. of Texas/Austin (United States)
Andrea Benigno, Univ. of Texas/Austin (United States)

Published in SPIE Proceedings Vol. 2124:
Laser Techniques for State-Selected and State-to-State Chemistry II
John W. Hepburn, Editor(s)

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