Vibrational analysis and physical property studies of 6-Methoxy-2-[(E)-phenyliminomethyl]-phenol in the THz, IR and UV-visible spectral regions.

Affiliation

Intermetallic and nonlinear optics laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli 620015, India. Electronic address: [Email]

Abstract

Bulk single crystals of 6-Methoxy-2-[(E)-phenyliminomethyl]phenol were grown after preparing the material by Schiff base condensation of ortho-vanillin alternatively called 2-hydroxy-3-methoxybenzaldehyde and aniline. The three dimensional molecular and crystal structure of the title compound is confirmed by X-ray diffraction. Molecules crystallized in the orthorhombic crystal system and noncentrosymmetric space group P212121. Geometry optimization, vibrational analysis, Calculation of HOMO-LUMO band gap and molecular hyperpolarizability of the proposed material have been carried out. Terahertz time domain spectroscopic studies have been performed and the refractive index and absorption coefficient of material is calculated in the THz regime. Molecular vibrations responsible for different THz phonon modes are identified with the help of density functional theory based calculations.

Keywords

Crystal growth,Density functional theory,Nonlinear optics,Organic materials,Second harmonic generation,THz spectroscopy,

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