Langmuir-Blodgett films of a series of new fluorescent ternary europium(III) complexes

Three europium complexes 1-methyl-4-octadecylpyridinium tetrakis(alpha-thenoyl trifluoroacetonato) europium(III), tris(alpha-thenoyl trifluoroacetonato) mono-(9-(4-hexadecylanilino)-4,5-diazafluorene) europium(III), and tris(alpha-thenoyltrifluoro acetonato) mono(2, 9-dimethyl-4, 7-diphenyl-1, 10-phenanthroline) europium(III) have been newly synthesized. They were capable of forming stable Langmuir films on pure water subphase(pH 5.6, 18 degrees C) with collapse pressures of 39.0, 50.0 and 20.5 mN/m, respectively. Langmuir-Blodgett films of these complexes have been prepared and studied by surface pressure-area isotherms, ultraviolet, fluorescent spectroscopy, fluorescent lifetime measurements and second-harmonic generation. Copyright (C) 1996 Published by Elsevier Science Ltd