Intrinsically Trapped Triplet Excitons in pi-Conjugated Polymers

Abstract

The X-band spin 1 photoluminescence-detected magnetic resonance of frozen toluene solutions of poly (p-phenylene ethynylene) (PPE) and poly (p-phenylene)-type ladder (LPPP) polymers are presented. The amplitude of the 800-1100 G wide triplet resonance pattern decreases with decreasing concentration of PPE in toluene and tetrahydrofuran; in frozen saturated solutions of LPPP it is about half of that in neat films. The results suggest the resonance is largely due to a long-lived (^30 microsecs) trapped triplet exciton state localized on a phenylene ring and stabilized by coupling to a segment of an adjacent chain. The role of this trapped triplet in the photophysics of pi-conjugated polymers is discussed.

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Document Details

Document Type
Technical Report
Publication Date
Sep 20, 1997
Accession Number
ADA330211

Entities

People

  • Arthur J. Epstein
  • J. Partee
  • J. Shinar
  • S. W. Jessen
  • W. Graupner

Organizations

  • Ohio State University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption Spectra
  • Amplitude
  • Conjugated Polymers
  • Couplings
  • Frequency
  • Intensity
  • Magnetic Fields
  • Magnetic Resonance
  • Microsecond Time
  • Molecular Structure
  • Molecules
  • Physics
  • Polymeric Films
  • Polymers
  • Quantum Properties
  • Resonance
  • X Band

Fields of Study

  • Chemistry

Readers

  • Polymer Science and Technology
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.

Technology Areas

  • Microelectronics