Oxygen pressure measurement using singlet oxygen emission | Zendy

Gamal E. Khalil | Zendy; Alvin Chang | Zendy; Martin Gouterman | Zendy; James B. Callis | Zendy; Larry R. Dalton | Zendy; Nicholas J. Turro | Zendy; Steffen Jockusch | Zendy

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Oxygen pressure measurement using singlet oxygen emission

Author(s) -

Gamal E. Khalil,

Alvin Chang,

Martin Gouterman,

James B. Callis,

Larry R. Dalton,

Nicholas J. Turro,

Steffen Jockusch

Publication year - 2005

Publication title -

review of scientific instruments

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.605

H-Index - 165

eISSN - 1089-7623

pISSN - 0034-6748

DOI - 10.1063/1.1896623

Subject(s) - pressure sensitive paint , oxygen sensor , materials science , phosphorescence , singlet oxygen , luminescence , oxygen , quenching (fluorescence) , polymer , porphyrin , photochemistry , optics , analytical chemistry (journal) , optoelectronics , fluorescence , chemistry , physics , composite material , organic chemistry , wind tunnel , chromatography , mechanics

Pressure sensitive paint (PSP) provides a visualization of two-dimensional pressure distributions on airfoil and model automobile surfaces. One type of PSP utilizes platinum tetra(pentafluorophenyl)porphine (PtTFPP) dissolved in a fluoro-polymer film. Since the intense 650nm triplet emission of PtTFPP is quenched by ground state oxygen, it is possible to measure two-dimensional oxygen concentration from the 650nm emission intensity using a Stern–Volmer-type relationship. This article reports an alternative luminescence method to measure oxygen concentration based on the porphyrin-sensitized 1270nm singlet oxygen emission, which can be imaged with an InGaAs near infrared camera. This direct measurement of oxygen emission complements and further validates the oxygen measurement based on PtTFPP phosphorescence quenching. Initial success at obtaining a negative correlation between the 650nm PtTFPP emission and the 1270nm O2 emission in solution led us to additional two-dimensional film studies using surfaces ...

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