Polymerized non-linear optical Langmuir-Blodgett films based on 2-(21-docosenyl)amino-5-nitropyridine

Abstract Using the Langmuir-Blodgett (LB) technique, multilayer films of 2-(21-docosenyl)amino-5-nitropyridine have been made by transferring stable monomolecular films from an air-water interface onto quartz substrates. Such multilayer films can be polymerized by X-ray irradiation. The films exhibit the same enhanced second harmonic generation efficiency before and after polymerization. No change in the morphology of the films has been observed after polymerization, probably because the vinyl group is at the terminal position of the hydrocarbon chain.