PHYSICOCHEMICAL CHARACTERIZATION OF 1,8-DICHLOROANTHRAQUINONE EVAPORATED THIN-FILMS

1,8-Dichloroanthraquinone (DCAQ) thin films evaporated under vacuum we re investigated by IR absorption, X-ray diffraction, electron spectros copy for chemical analysis, scanning electron microscopy and optical a bsorption. It was found that crystallized DCAQ thin films may be obtai ned for any kind of substrate after appropriate annealing or by deposi tion on a substrate heated at T(S) = 365 K. NMR spectra show that ther e is no-decomposition during the deposition of the film. The binding e nergies deduced from ESCA lines and the frequencies of the IR absorpti on bands were found to be in good agreement with the powder reference. Optical absorption may be associated with a gap of about 3.1 eV. The average grain size estimated from scanning electron micrographs is aro und 0.5 mum.