COMPARATIVE SPECTROSCOPIC ANALYSIS OF THIN FILMS AND TARGETS FROM NLO MATERIALS DEPOSITED BY PULSED LASER DEPOSITION

Organic dyes such as styrylquinolinium salts are new promising materials for photonic applications. Comparative FTIR spectroscopic analysis on thin films and targets from three new organic compounds, i. e. E-4-(2-(4-hydroxynaphthalen-1-yl)vinyl)-1-octylquinolinium iodide (1), (E)-1-ethyl-4-(2-(4-hydroxynaphthalen-1-yl)vinyl)quinolinium bromide (2), and 4-{(E)-2-[4-(dimethylamino)naphthalen-1-yl]ethenyl}-1-methylquinolinium iodide (3) deposited by means of Pulsed Laser Deposition (PLD) technique using high power UV Nitrogen laser are described. The thin films are deposited on substrates KBr, 316L SS alloy and aluminium foil. The organic materials are synthesized by Knoevenagel condensation. The thickness of the deposited films ranges from 80 to 300 nm as measured by interferometric method. The targets are formed by a moulding press. Characterization of the films and targets by FTIR spectroscopy showed a small difference between the deposited films and the native materials/targets, and their structure and composition depend on technological parameters.