Diffusion of dioxygen in 1-alkenes and biphenyl in perfluoro-n-alkanes

The translational diffusion constant, D , has been measured for O 2 in the even 1-alkenes 1-C 6 H 12 to 1-C 16 H 32 and biphenyl in n -C 6 F 14 and n -C 9 F 20 . Deviations from the Stokes–Einstein relation were found; the use of D / T = A / η p gave p =0.560±0.017 for O 2 in the 1-alkenes, the same (within experimental error) as found previously for O 2 in the n -alkanes. The charge transfer (CT) transition used to detect O 2 in the 1-alkenes is at 220 nm. The D values for biphenyl in the perfluoro- n -alkanes (PFAs) are consistent with those in the n -alkanes, where p =0.718±0.004. These results suggest that O 2 has similar solute–solvent interactions in both the 1-alkenes and n -alkanes as does biphenyl in the n -alkanes and PFAs.