Energy migration in conjugated polymers: the role of molecular structure.

TitleEnergy migration in conjugated polymers: the role of molecular structure.
Publication TypeJournal Article
Year of Publication2007
AuthorsRose, A, Tovar, JD, Yamaguchi, S, Nesterov, EE, Zhu, Z, Swager, TM
JournalPhilosophical transactions. Series A, Mathematical, physical, and engineering sciences
Date Publishedjun
Keywordsconjugated polymer energy transfer exciton diffusion conformation liq crystal

Conjugated polymers undergo facile exciton diffusion. Different molecular structures were examined to study the role of the excited state lifetimes and molecular conformations on energy transfer. There is a clear indication that extended fluorescence lifetimes give enhanced exciton diffusion as determined by fluorescence depolarization measurements. These results are consistent with a strong electronic coupling or Dexter-type energy transfer as the dominating mechanism. The control of polymer conformations in liquid crystal solvents was also examined and it was determined that more planar conformations gave enhanced energy transfer to emissive low band-gap endgroups.