Synthesis, Growth and Characterization of 4-Benzeneazoaniline Single Crystal

Abstract

A new organic nonlinear optical material 4-Benzeneazoaniline (C 12 H 11 N 3 ) was synthesized by diazotization and diazocoupling mechanisms. Single crystal of 4-Benzeneazoaniline was grown by slow evaporation of methanol solution at room temperature. Transparent crystals with size up_to 13x4x4 mm 3 were obtained. Single crystal X-ray diffractometer was utilized to measure the unit cell parameters and to confirm the crystal structure. The structure of compound was further confirmed by FTIR, 1 H & 13 C NMR and mass spectral analyses. The UV-Vis-NIR result shows that the crystal has a sharp cut off at 220 nm and is nearly 75% transparent over a wide wavelength range enabling it for application in the UV region. The optical energy gap of 4- Benzeneazoaniline was found to be 3.4 eV. Thermal properties of crystals were investigated using thermogravimetric and differential scanning calorimetric analyses, which indicated that the material does not decompose before melting. The NLO test confirms the second harmonic signal generation in the sample.