title: Energy migration in conjugated polymers: the role of molecular structure.
abstract: 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.
authors.affiliation: Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
authors.forename: Aimee
authors.initials: A
authors.lastname: Rose
authors.forename: John D
authors.initials: JD
authors.lastname: Tovar
authors.forename: Shigehiro
authors.initials: S
authors.lastname: Yamaguchi
authors.forename: Evgueni E
authors.initials: EE
authors.lastname: Nesterov
authors.forename: Zhengguo
authors.initials: Z
authors.lastname: Zhu
authors.forename: Timothy M
authors.initials: TM
authors.lastname: Swager