PREPARATION, CHARACTERIZATION, AND 2ND-HARMONIC GENERATION OF A LANGMUIR-BLODGETT-FILM BASED ON A RARE-EARTH COORDINATION COMPOUND

The rare-earth coordination compound (E)-N-hexadecyl-4-(2-(dimethylamino)phenyl)-ethenyl)pyridinium tetrakis(1-phenyl-3-methyl-4-benzoyl-5-pyrazolonato)dysprosium(III) was synthesized. The LB films were prepared and characterized by UV-vis, IR, X-ray photoelectron spectroscopy, and low-angle X-ray diffraction. High-quality LB films up to 50 layers on the hydrophilic substrates of quartz, calcium fluoride and glass were obtained. From the second-harmonic generation measurement, second-order molecular hyperpolarizability beta of the dysprosium complex was estimated to be about (6.6-9.3) x 10(-28) esu.