DIFFUSION OF C-60 IN POROUS SOL-GEL GLASS

Molecular dynamics computer simulation and experimental data for diffusion of cyclohexane and toluene solutions of C-60 inside porous sol-gel glass are reported. The average pore diameter of the glass used in the experiment was 2.8 nm, similar to that used in computer simulations, 2.5 nm. Translational motion of C-60 in solutions in the pores is about 10 times slower than the diffusion in the carrier. It is shown that thermally stable sol-gel glass samples can be uniformly impregnated with C-60 by diffusing C-60 toluene solutions into the pores. Optical spectra of wet and dry impregnated samples are similar.