SYNTHESIS, GROWTH, SPECTROSCOPIC AND OPTICAL STUDIES OF A NEW SEMIORGANIC NONLINEAR OPTICAL CRYSTAL: L-VALINE POTASSIUM CHLORIDE

A new semiorganic nonlinear optical crystal, L-Valine Potassium chloride (LVPC), has been synthesized and good optical quality single crystals (5 ×4×3mm 3 ) were grown by slow evaporation technique. The grown crystal was characterized by using FT-IR, UV-vis-NIR and DSC-TGA. The presence of various functional groups was confirmed by FT-IR spectroscopic technique. The UV–vis–NIR spectrum indicates that the crystal has very good absorption in the entire visible and near IR region spectrum suggesting the suitability of the material for NLO applications. The crystal was thermally stable up to 220oC as determined by DSC-TGA studies and mechanical stabilities of crystal have been confirmed by Vicker’s microhardness study. Dielectric constant was measured with various frequencies as a function of temperature. The second harmonic generation behavior of LVPC crystal was tested by Kurtz–Perry powder technique.