Summary
Oxygen quenches phosphorescence by energy transfer from the phosphor when oxygen molecules collide with molecules of the phosphor in the excited triplet state. Thus increasing oxygen pressure causes an increase in the rate of decay of phosphorescence (shorter lifetimes) and a decrease in total phosphorescence intensity. Phosphors have been selected which decay with a single exponential and for which the relationship between phosphorescence lifetime and oxygen pressure is quantitatively described by the Stern-Volmer equation. The use of phosphorescence lifetime as the measure of oxygen pressure makes the method insensitive to the absorbance changes of other chromophores in the system. This method has permitted quantitative, rapid (less than 10 msec) and sensitive (to less than 10−8 Torr) measurements of oxygen pressure in suspensions of cells or subcellular organells.
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Wilson, D.F. (1992). Oxygen Dependent Quenching of Phosphorescence: A Perspective. In: Erdmann, W., Bruley, D.F. (eds) Oxygen Transport to Tissue XIV. Advances in Experimental Medicine and Biology, vol 317. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3428-0_20
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DOI: https://doi.org/10.1007/978-1-4615-3428-0_20
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