A New Non-linear Stilbazolium Derivative Crystal of 4-[2-(3 Methoxy-phenyl)-vinyl]-1-methyl-pyridinium+ Iodide− (MMPI): Analysis of Its Structural, Surface, Optical and NLO Properties

New organic stilbazolium family of 4-[2-(3 methoxy-phenyl)-vinyl]-1-methyl-pyridinium+ iodide− (MMPI) was successfully synthesized using the condensation reaction method. The recrystallization process carried out to improve purity material, and MMPI grown into a single crystal by solvent evaporation solubility material taken at different temperatures with mixture Methanol: Acetonitrile (1:1). structure cell parameters were solved via X-ray diffraction analysis. structural formation title also confirmed Nuclear Magnetic Resonance spectroscopic (NMR) studies. experimental vibrational bands in have been assigned Fourier Transform Infrared (FT-IR) spectrum From optical analysis, crystal’s lower cut-off wavelength, transmittance range, band gap calculated. Chemical etching analysis on surface study property crystal. Along etching, atomic force microscope (AFM) scanning electron (SEM) used analyses surface. Hirshfeld intermolecular interactions. HOMO LUMO energies calculated theoretically Gaussian View 6 programmer. chemical activity evaluated molecular electrostatic potential density functional theory (DFT) third-order nonlinear He-Ne laser (632.8 nm) source beam Z-scan technique. In addition, it shows significant reverse saturable absorption self-defocusing.