The occurrence of non-Gaussian spectral lines shapes of molecules in electrostatically disordered media

Chergui, M. Zwan, G. & van der Mourik

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

We calculate the effects of relatively strong electric fields, corresponding to typical values for the fields inside glasses and proteins, on the spectroscopic properties of a simple two-level molecule. Disorder in the electric field strength is employed as a physical source for inhomogeneous broadening. A striking result is that a Gaussian probability distribution for the field over the ensemble does not give rise to a Gaussian spectral line shape. The results are used to describe the absorption spectra of the B800 band of the B800-850 light-harvesting complex of photosynthetic purple bacteria.
Original languageEnglish
Pages (from-to)9715-9719
JournalJournal of Physical Chemistry B
Volume105
DOIs
Publication statusPublished - 2001

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