Design of π-conjugated organic materials for one-dimensional energy transport in nanochannels

Juan Carlos Sancho-García*, Jean-Luc Bredas, David Beljonne, Jérôme Cornil, Roberto Martínez-Álvarez, Michael Hanack, Lars Poulsen, Johannes Gierschner, Hans Georg Mack, Hans Joachim Egelhaaf, Dieter Oelkrug

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

Various end-substituted distyrylbenzenes have been synthesized to serve as guest molecules in inclusion compounds to promote efficient energy transport along one-dimensional channels. Their optical and photophysical properties have been characterized at both experimental and theoretical levels. All molecules display a large transition dipole moment between the ground state and lowest excited state and hence a short radiative lifetime (on the order of 1-2 ns). They also exhibit a large spectral overlap between the emission and absorption spectra, which enables efficient energy transport between molecules arranged in a head-to-tail configuration in nanochannels. Hopping rates on the order of 10 12 s -1 are calculated at a full quantum-chemical level; this is much larger than the radiative lifetimes and opens the way for energy migration over large distances. Changes in the nature of the terminal substituants are found to modulate the optical properties weakly but to impact significantly the energy transfer rates.

Original languageEnglish (US)
Pages (from-to)4872-4880
Number of pages9
JournalJournal of Physical Chemistry B
Volume109
Issue number11
DOIs
StatePublished - Mar 24 2005

ASJC Scopus subject areas

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

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