Primary mechanisms in the radiolysis of amines: pulse and γ-radiolysis of neutral and acidic ethylamine, n-propylamine and ethylenediamine

摘要: The transient spectra in pure ethylamine (EA), n-propylamine (nPA), and ethylenediamine (EDA) show, besides the visible infrared band associated with solvated electron, e−s, a small ultraviolet attributed to oxidizing radicals. Upper limits for recombination rate constants k of e−s acidic cation are 1.5 × 1012 L mol−1 3.5 × 1012 L mol−1s−1 EA nPA respectively, k = 2 × 1010 L s−1 EDA. yield at 3 ns (G(e−s)3ns = 1.5, 1.2, 3.1 molecules/100 eV EA, nPA, EDA respectively) has been deduced by biphenyl scavenging. molecular hydrogen after γ-radiolysis G0(H2) = 5.7 3.6 respectively. effect solutes, such as biphenyl, alkyl-ammonium chloride, allyl alcohol, on G(H2) is interpreted terms scavenging and/or H atoms. From pulse-radiolysis determination G(e−s), we deduce nPA.Finally, decay electrons seems occur only via n...