화학공학소재연구정보센터
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.297, 421-426, 1997
Sensitized Photochromism - Effect on Degradation Product Distribution
In the presence of a triplet sensitizer such as camphorquinone the photodegradation of spiro-indolinonaphthoxazines in oxygen-saturated acetonitrile solutions can be achieved with visible light. From the resulting degradation product distribution it becomes evident that the formation of 3,3-dimethyloxindole and its derivatives is enhanced when compared to UV-induced photolysis, thus suggesting that these compounds originate from the spiro-indolinonaphthoxazine promoted to the first excited triplet state by energy transfer from the sensitizer.