Pulse Radiolysis of Liquid Amides

Authors: N. Hayashi, E. Hayon, T. Ibata, N. N. Lichtin, A. Matsumoto

The pulse radiolysis of the following liquid amides has been investigated: formamide (F), N-methylformamide (NMF), Ar,Ar-dimethylformamide (DMF), AqAr-dimethylacetamide (DMA), and Ar-methylpropionamide (NMP). Radiation-induced ionization and excitation processes have been observed on irradiation of solu- tions of anthracene (A) and naphthalene (N), as indicated by the characteristic spectra of A-, N”, AT, and NT. The yields of these species have been determined, based on known extinction coefficients. Transient absorptions with Xmax ~650 and 625 nm in DMF and DMA, respectively, have been assigned to the absorp- tion spectra of solvated electrons in these liquid amides. Absorption bands at Xmax ~350 nm due to the radi- cals HCONH(CH2), HCON(CH2)(CH3), and CH3CON (CH2) (CH3) have been observed and characterized. The nature of some of the other transient absorptions produced is discussed. It is concluded that the ab- sorption with Xmax at 540 nm which is produced in F is, contrary to a previous assignment, not due to solvated electrons.

https://doi.org/10.1021/J100684A007