AN INVESTIGATION OF THE TRIPLET-STATE PROPERTIES OF 1,8-NAPHTHALIMIDE- A LASER FLASH-PHOTOLYSIS STUDY

The triplet state of 1,8-naphthalimide has been studied by the laser f lash photolysis technique. The triplet-triplet absorption spectrum and the decay kinetics of the triplet state have been investigated in ben zene, acetonitrile and 2-propanol. It is shown that, unlike phthalimid e, 1,8-naphthalimide does not undergo photoinduced hydrogen abstractio n 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 b ehaviour of the compound towards some electron-rich substances have be en studied and the rate constants have been evaluated.