SYNTHESIS, GROWTH AND CHARACTERIZATION OF 2-AMINO 6-METHYLPYRIDINIUM 6-AMINOCAPROATE NONLINEAR OPTICAL SINGLE CRYSTAL

Abstract

New nonlinear optical single crystal of 2-Amino-6-methylpyidinium 6-Aminocaproate (2A6M6A) was
grown by slow evaporation method using water as a solvent. The grown 2A6M6A crystal was characterized and
confirmed by Single crystal X-ray diffraction. It is a monoclinic structure with noncentrosymmetric space group P. The
lattice parameters of the grown crystal is found to be a = 8.54 Å, b = 5.89 Å, c = 15.24Å, α = γ = 90,  = 102.86 and
volume V = 748 Å3
. The crystalline perfection was confirmed by Powder X-Ray diffraction analysis. The grown 2A6M6A
functional groups and chemical composition were confirmed by the FT-IR and Laser Raman spectroscopy analysis.
Optical studies are important criteria for the optical applications. The grown crystal was subjected to the UV analysis,
from the figure it is observed that the cut off wavelength at 295 nm and there is no absorption in the entire visible region.
The band gap of the grown 2A6M6A crystal is found to be 4.13 eV. The photoluminescence spectra give the qualitative
and quantitative analyses of 2A6M6A grown crystal. The excitation wavelength at 386 nm and the high intensity peak
was observed at 460 nm. Thermal stability of the material is confirmed by the thermal analysis; it is stable upto 193C.
Nonlinear optical studies confirmed by the Kurtz-Perry powder SHG test. The grown 2A6M6A crystal is 2.6 times higher
than that of KDP Crystal.