Non-linear optical analyses of nitro aniline derived Schiff bases of 9-anthraldehyde

Abstract The synthesis and non-linear optical properties of nitro aniline derived Schiff bases of 9-anthraldehyde were carried out. The compounds were characterized using FT-IR, Raman and UV–Vis spectroscopies. The FT-IR and Raman spectral data revealed the confirmation of Schiff bases with the absorption band assignable to the stretching of C N band. The charge transfer (CT) interaction between the donor and acceptor molecules were confirmed through λ max of the UV–Vis spectra. The UV–Vis analysis indicated, bathochromic shift in the compounds, implying a non-zero first order molecular hyperpolarizability ( β ) which are translated into macroscopic non-linearity χ 2 . To investigate the solid state macroscopic non-zero non-linear optical response, χ 2 , (second harmonic generation) the Kurtz and Perry method was used. This happens to be the first report on the non-linear optical analysis of these compounds.