Kz. Wang et al., 2ND-HARMONIC GENERATION FROM THE MONOLAYERS OF RARE-EARTH COMPLEXES ET(2)NC(6)H(4)CH=CHC(5)H(4)NC(16)H(33)LN(TTA)(4) (LN=LA,ND,DY,YB), Chemistry Letters, (9), 1994, pp. 1761-1764
The LB films of four hemicyanine salts with rare earth complex anions
were prepared. From second-harmonic generation experiments, the second
-order molecular hyperpolarizability beta was evaluated to be about 2X
10(-27) e.s.u. Enhanced second-order nonlinearity compared with the he
micyanine bromide was discussed according to the crystal structure of
a model complex. The results of UV -Vis, IR and low angle X-ray diffra
ction for the LB films are also reported.