Influence of non-Debye relaxation and of molecular shape on the time dependence of the stokes shift in polar media

Ed Castner, Graham R. Fleming, Biman Bagchi

Research output: Contribution to journalArticle

59 Citations (Scopus)


We present theoretical analyses of two different aspects of the time dependence of the fluorescence Stokes shift in polar liquids. We show that a small deviation from the Debye form for the dielectric relaxation of the solvent can strongly influence the time evolution of the Stokes shift. Using the Davidson-Cole form for dielectric response we find a stretched exponential time dependence as observed in recent experiments. We also show that the shape of the fluorescing molecule can influence the dynamics of solvation.

Original languageEnglish
Pages (from-to)270-276
Number of pages7
JournalChemical Physics Letters
Issue number3
Publication statusPublished - Jan 15 1988


ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Surfaces and Interfaces

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