PHOTOCHEMICAL HOLE-BURNING OF CATIONIC PORPHIN SAPONITE INTERCALATIONCOMPOUNDS

Intercalation compounds were synthesized from porphin derivatives with cationic substituents and saponite, which is a polycrystalline layere d silicate. The formation of the intercalation compounds was confirmed by X-ray diffractions and elemental analysis. We found that the porph in molecules lay their planar skeleton parallel to the silicate layer. Besides, photochemical holes can be burned at least up to 50 K and th e amount of spectral diffusion is smaller in these compounds than in a typical neutral porphin/polymer system.