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Determination of the phosphorescence quantum yield of singlet molecular oxygen (1Δg) by means of a radiometer and an infrared luminescence spectrometer

✍ Scribed by R. Schmidt

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
522 KB
Volume
151
Category
Article
ISSN
0009-2614

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✦ Synopsis

It was possible to measure the phosphorescence of singlet oxygen ('0,) sensitized by tctraphenylporphinc (TPP) by means of a sensitive pyroelectric radiometer. The IO2 phosphorescence quantum yield was determined directly by comparison of the intensities of the spectrally unresolved emissions of '02 and of the sensitizer TPP to be Qp=0.15 f 0.08 in Freon 113. The radiometer was also used to record the spectral sensitivity curve of a near infrared luminescence spectrometer. Corrected emission spectra have been calculated for '0, and several compounds serving as sensitizers and as emission standards too. Employing the sensitizers 9,1_dicyanoanthracene, rubicene and TPP the phosphorescence quantum yield in benzene was determined to be QP= (4.7 L 1.7) x la-'.

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