Cross Quenching of Fluoresence in Organic Solutions

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Abstract
Concentration quenching is usually considered to occur only between excited and unexcited molecules of the same kind. It is here investigated whether such quenching may also occur between molecules of different structure. Equations are given for testing its occurrence. By using gamma-ray induced fluorescence of solutions containing a combination of two solutes, it is found that concentration quenching occurs between molecules of different structure if their energy levels are close to each other.