Spectroscopic evaluation of Alanine Adipate nonlinear optical materials growth dynamics: Mechanical and thermal optimization

Abstract

Semi organic nonlinear optical material of alanine adipate (AA) was grown by slow evaporation solution method using ethanol as a solvent. The synthesized material was subjected to various characterization techniques. The single crystal X-ray diffraction analysis was carried out and their lattice parameters were determined. The presence of various functional groups of AA and their vibrational modes were identified from Fourier transform infrared (FTIR). FT-Raman spectral study has been performed to confirm the functional groups. The optical transmittance of the material was identified from UV–VIS-NIR studies. and the optical energy gap of AA is determined as 4. 851 eV. Fluorescence spectrum was also carried out using spectrofluorometer and the emission peak was observed at 454. 48 nm confirming the blue emission of the prepared crystals. The mechanical property of the grown crystal was studied using Vicker's micro hardness tester and the mechanical parameter values are calculated. Mechanical measurement indicates that the grown crystal belongs to softer category. Thermal properties of AA were evaluated with thermogravimetric analysis, differential thermal analysis and differential scanning calorimetry. The second harmonic generation efficiency was found to be 1.06 higher than that of standard potassium dihydrogen orthophosphate (KDP).