Determination of the Concentration and Accumulation Time of Triplet Molecules in Frozen Solutions from Change in Phosphorescence Intensity

Abstract

A method based on measurement of the intensity of phosphorescence with given change in the intensity of photoexcitation is proposed for determining the accumulation time and concentration of molecules in the triplet state in frozen solutions of organic compounds. The values for the kinetics of rise and fall of phosphorescence obtained by the usual method and the proposed method are compared. Good agreement is shown, and the advantages of the method are indicated.