Structural property relationships in conjugated polymers

P. Lynch, L. O'Neill, J. Whelan, M. McNamara, H. J. Byrne

Research output: Contribution to journalConference articlepeer-review

Abstract

The synthesis of a series of PPV derivative polymers by the Wittig-Homer reaction is described. The structure of each polymer is varied and the effects of these variations on the optical properties is explored. The effects of alkyloxy side chains is observed between the PPV derivatives Poly(-p-phenylvinylene-co-2,5-bis-octyloxy phenylvinylene.) PPV-OPV and Poly (para-2,5-bis-(n-octyloxy)-phenylvinylene) POPV. The phenyl units of the soluble PPV derivative POPV are replaced by alternate naphthyl units in the polymer Poly(2,5-bis(n-octyloxy)-1,4-phenylene vinylene-1,5-bis(n-octyloxy)-2,6- naphthylene vinylene) POPN-ONV and then fully by naphthyl units in Poly(2,6-bis-(n-octyloxy)-1,5-NaphthyleneVinylene) PONV. The addition of alkyloxy sidechains served to red shift the fluorescence emission as expected. The systematic conversion of phenyl to naphthyl units blue shifted the emission considerably while reducing the Stokes shift. There is evidence to suggest some localization of the n electrons over the aromatip units of the polymer backbone. PONV is shown to have greater stability towards photo-oxidation then either POPV or PPV-OPV.

Original languageEnglish (US)
Article number29
Pages (from-to)242-252
Number of pages11
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5826
DOIs
StatePublished - 2005
EventOpto-Ireland 2005: Optical Sensing and Spectroscopy - Dublin, Ireland
Duration: Apr 4 2005Apr 6 2005

Keywords

  • Conjugated
  • Optical absorbance and emission spectroscopy
  • Photo oxidation
  • Poly para phenylvenylene derivatives

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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