ESR study of low-temperature radiolysis and photolysis of substituted N '-furfurylidenebenzhydrazides

Low-temperature (77 K) gamma- and UV irradiation of substituted N'-furfuryl idenebenzhydrazides produces paramagnetic particles in radiation-chemical y ields of (0.05-0.5)/100 eV and quantum yields of 4 . 10(-5)-10(-3), respect ively. ESR study showed that hydrazyl radicals and HC . O and N . O-2 are t he main products of radiolysis and photolysis, and the latter decay upon he ating of the sample to 190 K, whereas the hydrazyl radicals survive up to 4 23 K. Further heating results in thermodestruction of the hydrazides, and t he ESR spectrum exhibits only a singlet with splitting at 1 mT, which is ch aracteristic of polyconjugated compounds.