Alignment of conjugated polymers in a nematic liquid-crystal host

Karolina P. Fritz, Gregory D. Scholes

Research output: Contribution to journalArticle

32 Scopus citations

Abstract

A general procedure, solvent-induced homogeneous dispersion, SIHD, is presented to incorporate and align conjugated polymers into a nematic liquid-crystal host. We report the investigation of the dye, N′,N′-bis(2,6 dimethylphenyl)-3,4,9,10, perylenetetracarboxylic dimide (PERY), and a conjugated polymer, poly[2-(2′ethylhexyloxy)-5-methoxy-1,4-phenylenevinylene] (MEH-PPV), aligned in a low molecular weight nematic liquid-crystal matrix, 4-n-pentyl-4′-cyanobiphenyl (5CB). Order parameters obtained for the guests from polarized absorption and fluorescence spectra are 0.46, 0.24, and 0.30 for PERY, MEH-PPV (Mn = 8.6 × 104), and MEH-PPV (Mn = 1.1 × 105) in 5CB, respectively. The liquid-crystal host provides a unique environment in which to study the conjugated polymer in a highly extended conformation. To this end, we discuss the relationship between polymer conformation and fluorescence, the line shape of the spectra, and the interchromophore/interchain versus intrachromophore/intrachain resonance energy transfer processes.

Original languageEnglish (US)
Pages (from-to)10141-10147
Number of pages7
JournalJournal of Physical Chemistry B
Volume107
Issue number37
DOIs
StatePublished - Sep 18 2003
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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