TITLE:
Synthesis, Growth and Characterization of 4-Benzeneazoaniline Single Crystal
AUTHORS:
T. Kishore Kumar, S. Janarthanan, S. Pandi, M. Victor Antony Raj, Kanagalakshmi, D. Prem Anand
KEYWORDS:
crystal growth, X-ray diffraction, NMR, DSC
JOURNAL NAME:
Journal of Minerals and Materials Characterization and Engineering,
Vol.9 No.11,
November
20,
2010
ABSTRACT: A new organic nonlinear optical material 4-Benzeneazoaniline (C12H11N3) 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 mm3 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, 1H & 13C 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.