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Träfflista för sökning "WFRF:(Ryderfors Linus) srt2:(2007)"

Sökning: WFRF:(Ryderfors Linus) > (2007)

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1.
  • Ryderfors, Linus, et al. (författare)
  • The Symmetry of Two-Photon Excited States as Determined by Time-Resolved Fluorescence Depolarisation Experiments
  • 2007
  • Ingår i: Journal of Physical Chemistry A. - : American Chemical Society (ACS). - 1089-5639 .- 1520-5215. ; 111:45, s. 11531-11539
  • Tidskriftsartikel (refereegranskat)abstract
    • A new experimental and theoretical approach is presented for the quantitative determination and assignment of the two-photon absorption tensor of fluorophores dissolved in liquid solutions. Two linearly independent time-resolved fluorescence anisotropies and the two-photon polarization ratio were determined from experiments based on using the time-correlated single photon counting technique. The data were analyzed in a global manner under the assumption of prevailing diffusive molecular reorientations and when accounting for the influence of rapid unresolved reorientations. The method has been applied in fluorescence studies of perylene, two-photon excited at 800 nm. The analysis suggests that the two-photon transition is mediated via vibronic coupling including at least two vibrations of different symmetry, and also that the first singlet excited electronic state acts as a dominating intermediate state.
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2.
  • Ryderfors, Linus, et al. (författare)
  • Two-Photon Excited Fluorescence and Molecular Reorientations in Liquid Solutions
  • 2007
  • Ingår i: Journal of Fluorescence. - : Springer Science and Business Media LLC. - 1053-0509 .- 1573-4994. ; 17:5, s. 466-480
  • Tidskriftsartikel (refereegranskat)abstract
    • Theoretical expressions are derived that relate the two-photon excited fluorescence depolarisation experiments to the molecular symmetry and the rotational motions of fluorescent molecules. Diffusive rotational motions in liquid solvents are considered, as well as the influence of fast unresolved motions (e.g. librations). The results obtained are compared with one-photon excited fluorescence depolarisation experiments. The derived theoretical expressions can be applied for detailed analyses of the molecular rotation in solvent. Several of the results are useful for determining and assigning the components of two-photon absorption tensors.
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  • Resultat 1-2 av 2
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refereegranskat (2)
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Mukhtar, Emad (2)
Johansson, Lennart B ... (2)
Ryderfors, Linus (2)
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Umeå universitet (2)
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2007 (2)Ta bort avgränsningen

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