V.Koshkin, N.Tkachenko, O.Yurchenko, Yu.Dolzhenko,
V.Glushko
Received July 9, 1998
The process rate has been
first directly measured for penetration of molecules into a layered crystal
matrix resulting in formation of equilibrium intercalation compounds. Taking
piperidine penetration into thin textured PbI2 films as an example,
the penetration speed has been shown to be from 10-4 to 10-3
cm/s, thus exceeding any typical diffusion rates. The intercalant penetration
process has been shown to consist in the phase front motion along the matrix
layers at a speed depending logarithmically on the intercalant vapor pressure.
It is shown that layered crystals can be used to purify air from organic
contaminants, in first turn, from those having pronounced electron-donating
molecular properties.