THE MNPS3 LAYERED PHASE AS A SUBSTRATE FOR AGGREGATE FORMATION - THE EXAMPLE OF TRIARYLPYRYLIUM CATIONS

Intercalation of triarylpyrylium salts into the MnPS3 layered phase ha s been achieved. The formation of J-aggregates in the interlayer space is suggested on the basis of UV-VIS absorption and emission spectrosc opy experiments. The extended dipole model approximation is used to de rive structural information that appears consistent with the X-ray pow der diffraction data. However, in contrast to previous results, none o f the intercalates exhibit any second harmonic generation. Finally, th e important influence of the host phase dielectric properties on aggre gate formation is emphasized.