An investigation of the triplet state properties of 1,8-naphthalimide: A laser flash photolysis study

Abstract

The triplet state of 1,8-naphthalimide has been studied by the laser flash photolysis technique. The triplet - triplet absorption spectrum and the decay kinetics of the triplet state have been investigated in benzene, acetonitrile and 2-propanol. It is shown that, unlike phthalimide, 1,8-naphthalimide does not undergo photoinduced hydrogen abstraction reactions with protic solvents. Quantitative data on various triplet state parameters such as molar extinction coefficient of the triplet - triplet absorption, triplet yield and energy have been obtained. The behaviour of the compound towards some electron-rich substances have been studied and the rate constants have been evaluated.