
TY  - JOUR
A1  - Smith, GJ 
A1  - Claridge, RFC 
T1  - Temperature dependence of diffusion in 3-methylpentane/methylcyclohexane mixtures above their glass transition temperatures
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1976
VL  - 29
IS  - 12
SP  - 2615
EP  - 1619
KW  - 
UR  - https://doi.org/10.1071/CH9762615 
N2  - The temperature dependences of the phosphorescence decay from the triplet state of naphthalene embedded in 3- methylpentane/methylcyclohexane mixtures of different compositions in the presence and absence of oxygen have been determined and are presented as Arrhenius plots. In the presence of oxygen, the slopes of these plots above the glass transition temperature depend on the composition of the mixture. It is shown that the effect of solvent composition in this temperature region can be explained by interactions between the solvent molecules which affect the activation energy of diffusion of the oxygen which is quenching the triplet state of naphthalene.     In the absence of oxygen, the effect of solvent mixture composition is small, and it is suggested that the deactivation of the triplet state is affected by steric constraints imposed by the surrounding molecules. 
ER  -

