DEVIATIONS FROM THE NORMAL TIME REGIME OF SINGLE-FILE DIFFUSION

Deviations from the ideal single-file behavior in actual systems, such as zeolitic host-guest systems with a one-dimensional channel structu re, may occur if (i) there is a possibility of mutual passages of the diffusants and (ii) the influence of the file boundary on the movement of the diffusants cannot be neglected. The conditions under which suc h deviations may become relevant are investigated both by analytical m ethods and molecular dynamics simulations. The consequences of these d eviations for experimental studies of single-file diffusion are discus sed.