Abstract
4-Octadecylamino-4′-nitro-tolan (ANT-18) and stilbene (ANS-18) formed stable condensed monolayers with the chromophores nearly vertical at the air/water interface. Applying the horizontal lifting method by rotation of the substrate with respect to the monolayer compression, a considerable in-plane anisotropy of the SHG for the ANT films was observed, whereas the ANS films showed relatively weak isotropic SHG intensities.
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