Abstract
4-fluoro salicylideneaniline (4FSA) (IUPAC Name: 4-Fluoro-2-[(phenylimino)methyl]phenol) crystals were grown by condensation reaction. The lattice constants and crystal system were determined from X-ray diffraction (XRD) analysis. 4FSA crystallizes in monoclinic centrosymmetric space group P21/c. The chemical composition of 4FSA was confirmed by carbon, hydrogen and nitrogen (CHN) elemental study. The vibrational frequencies of the crystal were identified by Infrared and Raman spectra. NMR spectroscopy was employed to ascertain the molecular structure. Thermogravimetric (TG) / Differential scanning calorimetry (DSC) analysis reveals that 4FSA is melting at 75 °C. The region of optical transmission of 4FSA has been studied by UV–Vis–NIR spectroscopy. The nonlinear refractive index (n2), nonlinear absorption coefficient (β) and the third-order nonlinear optical (NLO) susceptibility (χ(3)) were calculated by Z-scan analysis.
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