Haloalkanols and Haloalkanesulfonic Acids as Light Stabilizers of Optical Bleachers

摘要

Positive results concerning inhibition of photochemical degradation of optical bleachers with halide ions,arenes and their sulfonic acides,as well as halo-arenes and their sulfonic acids were obtained [1-4].At the same time,these methods are not free of certain drawbacks.For instance,bromide and iodide ions in bleached materials are gradually oxidized with atmospheric oxygen,liberating free bromine and iodine,and arenes and their derivatives reabsorb UV light,thus attenuating radiation of bleachers and complementing fluorescence of the latter with self-radiation not infrequently in a different spectral range.Therefore,there is a need in seeking for alternative approaches to light stabilization of optical bleachers.