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

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

doi:10.1021/jp011601v

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

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

BioAnalytical Chemistry

Research output: Contribution to Journal › Article › Academic › peer-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 language	English
Pages (from-to)	9715-9719
Journal	Journal of Physical Chemistry B
Volume	105
DOIs	https://doi.org/10.1021/jp011601v
Publication status	Published - 2001

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title = "The occurrence of non-Gaussian spectral lines shapes of molecules in electrostatically disordered media",

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.",

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N2 - 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.

AB - 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.

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DO - 10.1021/jp011601v

M3 - Article

VL - 105

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JO - The Journal of Physical Chemistry B

JF - The Journal of Physical Chemistry B

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