Synthesis, optical, dielectric, thermal and mechanical properties of a nonlinear optical amino acid crystal: Bis-glycine hydrobromide

A semi organic material Bis-glycine hydrobromide (C4H11N2O4+Br−) has been synthesized by slow solvent evaporation technique. The grown crystal was subjected to single crystal X-ray diffraction studies and its crystal parameters were confirmed. The FTIR analysis confirms the presence of various functional groups present in the title compound. The Kurtz powder second harmonic generation test shows that the crystal is a potential candidate for optical second harmonic generation. The UV–vis spectrum reveals the transparency of the crystal and enumerates the direct band gap energy of the material. The dielectric constant and the dielectric loss were studied as a function of frequency. The thermal studies indicate that the material is thermally stable up to 290 °C. The hardness number was calculated to be 110 kg/mm2 from the Vicker's microhardness test.