SYNTHESIS AND CHARACTERIZATION OF L-PROLINE POTASSIUM IODIDE CRYSTAL

Abstract

L-proline is an organic material, potassium iodide is an inorganic material and these two materials were mixed to form a semi-organic material viz. L-proline potassium iodide (LPPI) crystal in this work. Single crystals of L-proline potassium iodide were grown in an aqueous solution with slow evaporation process. LPPI crystals were obtained after the growth period of 35 days. XRD studies revealed the grown LPPI crystal to be crystallizing in a tetragonal structure. The grown LPPI crystal was analyzed for mechanical stability. Dielectric studies of the LPPI crystals were carried out to evaluate the dielectric constant, dielectric loss and AC conductivity. UV-visible-NIR spectral studies were performed in the wavelength range 200-1100 nm, and linear optical properties like transmittance, absorption coefficient and extinction coefficient of the sample were evaluated. Using Kurtz-Perry technique, second order NLO studies of the grown crystal of LPPI were carried out. In order to confirm the functional groups of the prepared sample, FTIR study was taken. EDS study was done to find the weight percent of the elements in the sample. Electronic polarizability and LDT value of LPPI crystal were estimated and the results were analyzed.