Intermediate products in the radiolysis of solid cis-pentene-2

• Published in: Radiation physics and chemistry Vol. 10; no. 5; pp. 319 - 322
• Main Authors: Owczarczyk, A., Stachowicz, W.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 1977
• ISSN: 0146-5724
• DOI: 10.1016/0146-5724(77)90038-3

Three absorption maxima (at 262, 310 and 610 nm) have been observed in the optical spectrum of cis-pentene-2 glass irradiated at 77 K. The stabilized transient species responsible for these maxima have been identified by optical bleaching, thermal annealing, scavenger studies and ESR measurements. The maximum at 610 nm is assigned to the parent radical-cations formed in the primary ionization process. The molar extinction coefficient and the G value of the cation are estimated as (1.1 ± 0.2) × 10 4 dm 3 mol -1 cm -1 and 0.14 ± 0.02 respectively. The maximum at 310 nm is attributed to pentallyl anions and that at 262 nm to pentallyl radicals. The extinction coefficients of these species were evaluated as (3.4 ± 0.6) × 10 3 dm 3 mol -1 cm -1 and (1.2 ± 0.4) × 10 4 dm 3/mol -1 cm -1 and their G values as 0.14 ± 0.02 and 1.3 ± 0.1 respectively.