SPECTROSCOPIC STUDIES OF HYBRID THIN FILMS CONSISTING OF A CLAY AND TETRATHIAFULVALENE

We fabricated novel hybrid films consisting of a clay and cationic tetrathiafulvalene (TTF). The average distance between the TTF molecules adsorbed onto the clay sheet was controlled by changing the fabricating condition. The obtained films showed the absorption bands at around 450, 750 and 2000 nm, which were assigned to an intramolecular transition of TTF+, and intermolecular transitions between TTF+s and between TTF+ and TTF0, respectively. The relative absorbances of the bands were found to vary depending on the average distance between the TTF molecules adsorbed onto the clay sheet. This fact indicates that the electronic properties of the TTF molecules in the present films can be controlled by changing the fabricating condition.