Excitation migration along oligophenylenevinylene-based chiral stacks: Delocalization effects on transport dynamics

D. Beljonne, E. Hennebicq, C. Daniel, L. M. Herz, C. Silva, G. D. Scholes, F. J.M. Hoeben, P. Jonkheijm, A. P.H.J. Schenning, S. C.J. Meskers, R. T. Phillips, R. H. Friend, E. W. Meijer

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77 Scopus citations

Abstract

Atomistic models based on quantum-chemical calculations are combined with time-resolved spectroscopic investigations to explore the migration of electronic excitations along oligophenylenevinylene-based chiral stacks. It is found that the usual Pauli master equation (PME) approach relying on uncoherent transport between individual chromophores underestimates the excitation diffusion dynamics, monitored here by the time decay of the transient polarization anisotropy. A better agreement to experiment is achieved when accounting for excitation delocalization among acceptor molecules, as implemented in a modified version of the PME model. The same models are applied to study light harvesting and trapping in guest-host systems built from oligomers of different lengths.

Original languageEnglish (US)
Pages (from-to)10594-10604
Number of pages11
JournalJournal of Physical Chemistry B
Volume109
Issue number21
DOIs
StatePublished - Jun 2 2005

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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