Oxygen sensing system using triplet-triplet reflectance of zinc porphyrin immobilized in polymer membrane studies by laser flash photolysis

Takako Furuto, Sang Kyung Lee, Yutaka Amao, Keisuke Asai, Ichiro Okura

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

A new oxygen sensing system based on the photoexcited triplet state quenching of photosensitizers immobilized in polymer matrices has been developed by laser flash photolysis. As the photosensitizers, zinc tetraphenylporphyrin (ZnTPP), zinc tetrakis(pentafluorophenyl) porphyrin, (ZnTFPP), zinc etioporphyrin (ZnEtioP), zinc octaethylporphyrin (ZnOEP), or zinc tetrabenzoporphyrin (ZnTBP) are used. As the polymer matrices, polystyrene (PS), Polyvinylchloride (PVC), polymethylmethacrylate (PMMA) and polydimethylsiloxane (GP197) are used. Among the above systems, ZnTFPP immobilized in PS membrane is the most suitable for oxygen sensing; a large Stern-Volmer constant (0.611 Torr-1) and good stability against irradiation were obtained.

Original languageEnglish
Pages (from-to)81-86
Number of pages6
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume132
Issue number1-2
DOIs
Publication statusPublished - 2000 Mar 20
Externally publishedYes

Keywords

  • Laser flash photolysis
  • Oxygen sensing
  • Stern-Volmer equation
  • Zinc porphyrins

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Physics and Astronomy(all)

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