Growth, spectral, optical and dielectric characterization of an organic nonlinear optical material: 4-hydroxytetramethylpiperazinium picrate

Abstract

A new nonlinear optical material, 4-hydroxytetramethylpiperazinium picrate was synthesized and crystallized by slow evaporation solution growth technique at room temperature. The UV–visible spectral analysis was used to study the optical property of the complex. The band gap energy of the complex was calculated and found to be 2.0eV. The emission spectrum of the complex exhibits green and red fluorescence emissions in the wavelength region of 505 and 729nm respectively. The FTIR spectrum was carried out to confirm the presence of various functional groups. The different kinds of protons and carbons were confirmed by 1H and 13C NMR spectroscopic techniques. The dielectric constant and dielectric loss of the complex decreases with increase in frequency. The SHG efficiency of the grown crystal was confirmed using Kurtz–Perry powder technique and observed that the complex has SHG efficiency 1.5 times greater than that of potassium dihydrogen phosphate (KDP).