QUANTUM YIELDS OF TRIPLET FORMATION OF SOME DERIVATIVES OF ANTHRAQUINONE

Abstract

Abstract— Quantum yields of triplet formation for five amino substituted anthraquinones have been determined by the comparative actinometer method using laser flash photolysis. Substitution reduces the yields to values of ˜10 ‐ ‐ 2 . and the requirement of low laser intensities required high sensitivity of detection of triplet absorption. The ø T values are compared with the quantum efficiencies of fluorescence and decomposition for the compounds, and the criteria for light stability discussed.