抄録
Several halogenated bisphenols were converted into a series of dechlorinated bisphenol derivatives by ultraviolet irradiation in isopropanol under nitrogen gas. The observed rate of photodegradation was a first order reaction with respect to the bisphenols concentration, and decreased with increasing number of their chlorines. Photolysis of dichlorophene, which contains two chlorines, progressed through two consecutive steps of dechlorination, and produced 2, 2'-dihydroxydiphenylmethane via 5-chloro-2, 2'-dihydroxydiphenylmethane. Similarly, bithionol which contains four chlorines was photodegraded, and gave a series of dechlorinated derivatives, 2, 2'-dihydroxytrichlorodiphenyl sulfide, 2, 2'-dihydroxydichlorodiphenyl sulfide, and 2, 2'-dihydroxychlorodiphenyl sulfide. On the other hand, dichlorophene was degraded by irradation in aqueous alkali, but yielded little dechlorinated products.
