Photophysical and photochemical properties of some triazine-stilbene fluorescent brighteners

The study presents the photophysical and photochemical characteristics in aqueous solution of some triazine-stilbene fluorescent brighteners containing 2-hydroxyethylamino groups and their trans-cis isomers in equilibrium. It has been established that the type of substituent in the triazine ring does not affect significantly the absorption-fluorescence assignments or the relative distribution of the trans- and cis-isomers. (C) 2000 Elsevier Science Ltd. All rights reserved.