Chromatic Phase and Molecular Packings of Polydiacetylene Langmuir-Blodgett Films

Molecular packings of polydiacetylene (PDA) Langmuir-Blodgett (LB) film in various chromatic phases such as blue, red and bluish-green forms have been clarified by the electron diffraction analysis for the first time. Spectroscopic properties - molecular packings relationships for the chromatic phases of PDA LB film indicate that the chromatic phase of PDA is strongly dependent on its molecular packing in the crystal phase.