RADICAL FORMATION IN PULSE-RADIOLYSIS OF ORGANIC SOLUTIONS OF 9,10-DIHYDROPHENANTHRENE

Formation and decay of neutral radicals from 9,10-dihydrophenanthrene (DHPT) in irradiated organic solutions was studied by pulse radiolysis method. Major species of the neutral radicals are H-adducts (H-DHPT) in ethanol solution of DHPT, whereas they are 9-hydrophenanthryl radic als (9-HPT) in 1,2-dichloroethane(DCE) solution of DHPT. In ethanol so lution, H-DHPT is generated through proton transfer to the anion radic al of DHPT and through reaction between atomic hydrogen and DHPT. In t he DCE solution, 9-HPT is generated mainly through deprotonation from cation radicals of DHPT. Reaction between solvent radicals and DHPT pl ays a minor role fbr the formation of 9-HPT. (C) 1997 Published by Els evier Science Ltd.