Chemiluminescence arising from the interaction of rubrene with intermediates derived from hydrogen peroxide and bis(2,4-dinitrophenyl) oxalate (DNPO): quantum yield and carbondioxide yield

György Orosz, Richard S. Givens, Richard L. Schowen

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The reaction at room temperature of 0.25 M hydrogen peroxide with 12.3 mM bis)2,4-dinitrophenyl) oxalate (DNPO) in tetrahydrofuran solvent in the presence of the fluorophore rubrene and 13.6 mM tetrabutylammonium perchlorate yields a burst of chemiluminescence in which the intensity rises rapidly and decays more slowly, as in many analogues systems. Double-reciprocal plots of quantum yield as a function of rubrene concentration (0-1.03 mM) are linear with a saturation constant of about 0.5 mM, similar to that found under other conditions. The decay in intensity of chemiluminescence was approximately exponential with a time constant of about 5 × 10-2 s-1, independent of the rubrene concentration. The DNPO concentration fell with a time constant of about 3 × 10-2 s-1, also independent of the rubrene concentration. Information on the final yield of carbon dioxide in this system was obtained by measurement of the infrared absorption intensity at 2336 cm-. The absorbance is linear in quantum yield at rubrene concentrations from 0.02 to 1 mM, the absorbance approximately doubling as the quantum yield rises from zero to 0.013. The results indicate that a common intermediate generates both carbon dioxide and photons in a fluorophore-dependent manner.

Original languageEnglish
Pages (from-to)219-223
Number of pages5
JournalAnalytica Chimica Acta
Volume266
Issue number2
DOIs
Publication statusPublished - Sep 1 1992

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Keywords

  • Chemiluminescence
  • DNPO
  • Hydrogen peroxide
  • Infrared spectrometry
  • Rubrene

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy

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