Oxygen sensing based on lifetime of photoexcited triplet state of platinum porphyrin-polystyrene film using time-resolved spectroscopy
作者： YUTAKA AMAO , KEISUKE ASAI , ICHIRO OKURA
DOI: 10.1002/(SICI)1099-1409(200004/05)4:3<292::AID-JPP216>3.0.CO;2-W
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摘要: Optical oxygen-sensing systems based on the quenching of photoexcited triplet state platinum porphyrins—platinum octaethylporphyrin (PtOEP) and tetrakis(pentafluorophenyl)porphyrin (PtTFPP)—in polystyrene (PS) using two different time-resolved spectroscopies (luminescence lifetime measurement diffuse reflectance laser flash photolysis) have been developed. Using both spectroscopies, same values Stern-Volmer constant KSV rate kq (KSV = kqτ0) are obtained. The decays luminescence triplet-triplet porphyrins in PS consisted components (faster slower lifetimes) absence presence oxygen. For faster decreases with increasing oxygen concentration. a plot porphyrin-PS films exhibits linearity. However, component is larger than that (for PtOEP, three times larger; for PtTFPP, ...
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