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Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1979 Dec;76(12):6047–6049. doi: 10.1073/pnas.76.12.6047

Direct spectroscopic observation of singlet oxygen emission at 1268 nm excited by sensitizing dyes of biological interest in liquid solution

A U Khan 1, M Kasha 1
PMCID: PMC411797  PMID: 16592729

Abstract

The direct observation of dye-photosensitized 1268-nm emission of the 1Δg → 3Σg transition of molecular oxygen in liquid solution at room temperature is reported. Singlet oxygen was photosensitized by UV excitation of perfluorobenzophenone in fluorocarbon solvent, by 3,4-benzpyrene and hematoporphyrin in carbon tetrachloride, and by methylene blue in water. Also reported is the development of an extremely sensitive near-infrared spectrophotometer that uses a thermoelectrically cooled lead sulfide detector, optimized optics, and a boxcar integrator as a data processor.

Keywords: photosensitization

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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