Growth and characterization analyses of pure and p-nitroaniline doped l-lysine monohydrochloride single crystal for nonlinear optical applications

Single crystal of pure and p-nitroaniline doped l-lysine monohydrochloride monohydrate were grown from the aqueous solution by slow evaporation solution growth technique at room temperature. In this paper, the effect of p-nitroaniline doping on the LLMHCL crystal properties have been studied elaborately. The grown crystals were characterized by powder X-ray diffraction, Fourier transform infrared (FTIR) spectroscopy, UV–vis-NIR, thermo gravimetric analysis (TGA) and hardness measurement. The lattice dimensions were calculated from the PXRD analysis and found that the title compound crystallizes in monoclinic crystal system. Presence of functional groups was identified from Fourier transform infrared spectroscopy (FTIR). UV–vis-NIR studies have been carried out in order to study the optical properties of the as grown and doped LLMHCL. Thermal stability has been assessed by thermo gravimetric analysis. Hardness measurements were done to calculate the mechanical strength of the material in order to check its suitability for device fabrications.