Slowing down of oxygen migration in the processes of radical oxidation and of phenanthrene phosphorescence quenching in methanol glasses at 90 K

Detection of deep traps for gas molecules in methanol/water glasses at 77 K

“…2). This conclusion is in a qualitative agreement with the results obtained for the system with 9% of water for the reaction carried out at 87 K [11,12]. The kinetics in the solid phase is sometimes described by a time-dependent rate constant.…”

“…2). Such kinetic behavior has been studied in detail for a methanol matrix containing 9% of water [11,12]. It was shown that the oxidation rate in the annealed samples might be calculated using both the rate in non-annealed samples and Kohlrasch's exponents for non-annealed and annealed samples.…”

“…Probably, as in Ref. [12], it might be assumed that the time dependence of the rate constant in this matrix is also formed by the relaxation processes occurring in the sample.…”

On the number of amorphous phases in n-butanol

“…Thus, the kinetic curves of reactions performed under the same conditions but for various oxygen concentrations should coincide, as compared with the case described by Eq. (3), in the coordinates ln (R/R 0 )/c Ä t. Such behavior was observed for radical oxidation in [21,26,[30][31][32][33].…”

“…An increase in temperature can cause the relaxation process of changes in glass structure. The reaction kinetics in the relaxed matrix differs from that in the non-relaxed glass [30][31][32][40][41][42]. The matrix structure relaxation accompanying this reaction can be an additional reason for the non-exponentiality of chemical reaction kinetics [32].…”