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An investigation into the excitation migration in polyfluorene solutions via temperature dependent fluorescence anisotropy.

Vaughan, H.L.; Dias, F.M.B.; Monkman, A.P.

Authors

H.L. Vaughan



Abstract

Fluorescenceanisotropy of dilute polyfluorene polymer solutions has been used to show that two processes, exciton migration and conformational relaxation (twisting of part of the chain), occur within polyfluorene polymers of 20 or more repeat units. The former process is dominant and temperature independent for high excitation energy but, as the chain length is decreased, exciton migration is eliminated and the conformational relaxation becomes the only mechanism by which excited stateenergy relaxation to the emission site can occur. When the polymers are excited in the absorption band tails, again no migration is observed but conformational relaxation is still present.

Journal Article Type Article
Publication Date 2005-01
Journal Journal of Chemical Physics
Print ISSN 0021-9606
Publisher American Institute of Physics
Peer Reviewed Peer Reviewed
Volume 122
Issue 1
Article Number 014902
DOI https://doi.org/10.1063/1.1829035
Keywords CONJUGATED POLYMERS; DYNAMICS; ENERGY; ELECTROLUMINESCENCE; DEPOLARIZATION; OLIGOMERS
Public URL https://durham-repository.worktribe.com/output/1569061