Journal article
PHOTOPHYSICS OF 6-(2'-HYDROXY-4'-METHOXYPHENYL)-S-TRIAZINE PHOTOSTABILIZERS
SW BIGGER, KP GHIGGINO, IH LEAVER, AD SCULLY
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | ELSEVIER SCIENCE SA LAUSANNE | Published : 1987
Abstract
The room temperature photophysical properties of several sulphonated and unsulphonated 6-(2′-hydroxy-4′-methoxyphenyl)-s-triazines were investigated in a range of solvents by means of steady state and picosecond fluorescence spectroscopy. Compounds possessing phenyl or p-tolyl groups in the s-triazinyl ring exhibit only a very weak normal Stokes-shifted fluorescence, arising from the initially excited chromophore. Substitution of phenoxy groups into the s-triazinyl ring results in the appearance of an additional longer-wavelength fluorescence which is assigned to the keto tautomer, formed following excited state intramolecular proton transfer (ESIPT). The rate constant for the (ESIPT) proces..
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