Enhanced photostability of poly(1,3-phenylene diphenylvinylene)-derivatives by diphenyl-substitution

A. T H Koch, N. T. Harrison, N. Haylett, Rusli Daik, W. J. Feast, R. H. Friend

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

We report measurements of the UV-photodegradation of the poly(para-phenylene vinylene) derivatives poly-(4,4′-diphenylene diphenylvinylene) (PDPV) and poly-(1,3-phenylene diphenylvinylene) m-PPV-DP in the presence of oxygen. We find that degradation of both PDPV and m-PPV-DP is slower than that of PPV, and attribute this to the replacement of the vinylene hydrogens by phenyl rings. The photoluminescence decay and the photoluminescence excitation spectra were measured as a function of UV-irradiation time. Initially a reversible luminescence quenching process was observed for films of either PDPV or m-PPV-DP in moist air in the presence of oxygen and/or water. We propose that this arises from conformational changes of the polymer chain produced following optical excitation. At longer irradiation times, FTIR studies reveal that the degradation process is oxidative. This oxidation is rate limited by oxygen diffusion into the film. Models for the photoluminescence properties are presented.

Original languageEnglish
Pages (from-to)113-122
Number of pages10
JournalSynthetic Metals
Volume100
Issue number1
DOIs
Publication statusPublished - 26 Mar 1999
Externally publishedYes

Fingerprint

Photoluminescence
Substitution reactions
substitutes
Oxygen
Derivatives
photoluminescence
oxygen
Irradiation
degradation
Degradation
Time and motion study
irradiation
Photoexcitation
Photodegradation
excitation
Luminescence
Hydrogen
Quenching
Polymers
quenching

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Polymers and Plastics

Cite this

Enhanced photostability of poly(1,3-phenylene diphenylvinylene)-derivatives by diphenyl-substitution. / Koch, A. T H; Harrison, N. T.; Haylett, N.; Daik, Rusli; Feast, W. J.; Friend, R. H.

In: Synthetic Metals, Vol. 100, No. 1, 26.03.1999, p. 113-122.

Research output: Contribution to journalArticle

Koch, A. T H ; Harrison, N. T. ; Haylett, N. ; Daik, Rusli ; Feast, W. J. ; Friend, R. H. / Enhanced photostability of poly(1,3-phenylene diphenylvinylene)-derivatives by diphenyl-substitution. In: Synthetic Metals. 1999 ; Vol. 100, No. 1. pp. 113-122.
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