부산대학교 도서관

At photolysis (253.7 nm) of monophenylphosphate (10.sup.-3 m) in O.sub.2-free neutral aqueous solution were determined: orthophosphate (I|=0.006), phenol (I|=0.0029), besides of small amounts of phosphorous acid, benzene, 2.2 -dihydroxybiphenyl and traces of 2.4 - and 4.4 -dihydroxybiphenyl. The yield of the main products is smaller at pH 2 and 12. Polymers were formed at u.v.-doses >2*10.sup.19 hv/ml. The electron yield determined by means of [N.sub.2]O increases from I| (N.sub.2)= I|(e .sub.aq .sup.- )=0.012 to 0.019 changing the ester concentration from 0.001 to 0.1m. I| (N.sub.2)-value rises by addition of methanol or increasing pH. As electron ejecting state an excited complex is postulated. The effective ionization potential of phenylphosphate in aqueous solution is a|4.9 e.v.