Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 110533
Title Spectral effects of excitonic interactions in disordered solid films
Author(s) Stomphorst, R.G.; Schaafsma, T.J.; Zwan, G. van der
Source The Journal of Physical Chemistry Part A: Molecules, Spectroscopy, Kinetics, Environment, & General Theory 105 (2001)17. - ISSN 1089-5639 - p. 4226 - 4234.
Department(s) Biophysics
Publication type Refereed Article in a scientific journal
Publication year 2001
Abstract This paper describes the absorbance properties of pigments in disordered films. The fluorescence quenching of pigment systems at low concentrations are usually attributed to the presence of so-called statistical pairs. We show that, if line broadening mechanisms are taken into account such as homogeneous and inhomogeneous broadening and statistical distribution of distances between the pigments, the number of potential quenchers decreases dramatically, because all of these effects lead to an increase of the dipole strength of the lowest excitonic state of a dimer. We also show, on the basis of Monte Carlo calculations on assemblies of pigments, that spectral effects beyond a general broadening of the spectrum will not be observed, even for concentrated systems, where a larger number of these statistical pairs may assumed to be present.
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