Water effect on oxygen diffusion in n-butanol glass

This paper reports on the kinetics of diffusion-controlled processes: oxida tion of tert-butyl radicals by molecular oxygen, phenanthrene phosphorescen ce quenching by molecular oxygen, and fluorescence ignition of the anthrace ne-oxygen geminal pair in an n-butanol-water frozen solution. An anomalous drop of oxygen diffusivity for water contents higher than 2.5-3 v/o has bee n found This effect is associated with the microheterogeneous structure of the solution.