Growth, optical, thermal and dielectric studies of a highly polarisable semi organic NLO crystal: Bis D-phenyl glycinium sulphate monohydrate

Single crystals of nonlinear optical bis D-phenyl glycinium sulphate monohydrate (BD-PGSMH) are grown by slow evaporation technique from aqueous solution at room temperature. Optically transparent crystals of dimensions up to 32 × 30 × 2 mm³ are obtained within a period of 30 days. Single crystal X-ray diffraction analysis and powder X-ray diffraction analysis confirm that the crystal belongs to monoclinic system with the space group P2₁. The crystal is subjected to the characterizations such as Fourier transform infrared (FTIR) analysis, UV–visible–NIR optical absorption spectral studies, thermo gravimetric and differential thermal analysis (TGA/DTA) and dielectric measurements. The electrical conductivity variation is also studied for different temperatures. The second harmonic generation (SHG) property in the crystal is confirmed by using Kurtz-powder technique and the SHG efficiency is found to be 0.8 times greater than that of KDP crystal. - Highlights: • BD-PGSMH crystals were grown using slow evaporation technique. • XRD analysis confirms that it crystallizes in monoclinic system. • The SHG efficiency was found to be 0.8 times that of KDP crystal