Langmuir, Vol.10, No.10, 3794-3796, 1994
Molecular Design and Langmuir-Blodgett-Film Studies on a Series of New Nonlinear-Optical Rare-Earth Complexes
Strong second-harmonic generation has been observed from Langmuir-Blodgett films, with high collapse pressure of 4-[(4-(N,N-diethylamino)phenyl)azo]-1-octadecylpyridinium - tetrakis(4-benzoyl-1-phenyl-3-methylpyrazolone-5)dysprosium (compound A) and 4-[(4-(N,N-diethylamino)phenyl)azo]-1-octadecylpyridinium-tris( 4-benzoyl-1-phenyl-3-methylpyrazolone-5)-(4-dodecanoyl-1-phenyl-3-methylpyrazolone-5)-dysprosium (compound B). The second-order molecular hyperpolarizabilities beta of the rare earth complexes were evaluated to be (1.2-2.8) x 10(-27) eSU and(1.5-3.5) x 10(-27) eSU for compounds A and B, respectively.