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Portrait of Tönu Pullerits; Photo: Kennet Ruona

Tönu Pullerits

Professor

Portrait of Tönu Pullerits; Photo: Kennet Ruona

Solute specific polar solvation studied by photon echo spectroscopy

Author

  • Niklas Christensson
  • Benjamin Dietzek
  • Arkady Yartsev
  • Tönu Pullerits

Summary, in English

Polar solvation dynamics Of two Solute molecules in a series of 1-alcohols has been studied using the three-pulse photon echo peak shift technique. The inertial dynamics, on sub-200 fs timescale, is essentially independent of solvent in the 1-alcohol series. For a given solute, the solvent dependence is mainly manifested in the diffusive solvation dynamics. The solute dependence appears as a significantly stronger inertial component in one of the molecules. We ascribe this solute dependence to the differences in charge redistribution upon excitation. A detailed investigation of oscillations of the peak shift reveals a solvent dependent beating that can be connected to solvation of the vibrational mode in the excited state. The solvent dependence of the dephasing dynamics of the excited state mode can be explained by the electronic transition frequency correlation function and the beating pattern of the echo signal originates from interference between ground and excited state Feynman pathways. (C) 2008 Elsevier B.V. All rights reserved.

Department/s

  • Chemical Physics

Publishing year

2009

Language

English

Pages

85-95

Publication/Series

Chemical Physics

Volume

357

Issue

1-3

Document type

Journal article

Publisher

Elsevier

Topic

  • Atom and Molecular Physics and Optics

Keywords

  • Photon echo spectroscopy
  • Molecular vibrations
  • Solvation

Status

Published

ISBN/ISSN/Other

  • ISSN: 0301-0104