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Dispersive electronic excitation transport in polymeric solids at and near room temperature

Authors :
Alan D. Stein
Kristen A. Peterson
Michael D. Fayer
Source :
Chemical Physics Letters. 161:16-22
Publication Year :
1989
Publisher :
Elsevier BV, 1989.

Abstract

Time-resolved fluorescence depolarization is used to examine electronic excitation transport among naphthalene chromophores in a polymeric solid as a function of excitation wavelength between 300 and 50 K. The characteristics of the wavelength and temperature dependences reveal, for the first time, that dispersive transport occurs at and near room temperature. The rate of excitation transport depends on the wavelength of excitation. A theoretical treatment is able to reproduce the essential features of the wavelength and temperature dependences without recourse to adjustable parameters by avoiding the complexities of the relationship between the difference in energy of a pair of molecules and the pairwise transfer rate.

Details

ISSN :
00092614
Volume :
161
Database :
OpenAIRE
Journal :
Chemical Physics Letters
Accession number :
edsair.doi...........8d73d0b7acd79fee3695d09a33c00f0f
Full Text :
https://doi.org/10.1016/s0009-2614(89)87023-x