D. JencylinNavarani, P.Selvarajan, S.Lincy Mary Ponmani, N.Balasundari
Amino acids play an important role in the field of non linearoptical (NLO) crystals. A amino acid consists of an amino groups, a carboxyl group, a hydrogen atoms and a distinctive R group (side chain), all of which boded to a alpha –carbon. This tetrahedral array of four different groups about alpha –carbon confers optical activity of amino acid. Thus, amino acid is used as dopant in order to enhance the material properties such as nonlinear optical. Based on this , L -arginine, is added with gamma glycine as dopant in various molar percentage. single crystals of glycine lithium chloride was synthesized by solution method and the solubility study was carried out at various temperature ranging from 30-50 oC in aqueous solution. Using the solubility data, saturated solution of the sample was prepared and single crystals of the synthesized salt was grown by slow evaporation method. The study of induction period against supersaturation gives an idea of optimized induction period in order to have a controlled nucleation rate to grow good quality single crystals. Then the grown crystals have been subjected to XRD studies to estimate the crystal structure. The functional groups have been identified by FTIR studies. Ultraviolet-visible (UV-Vis) spectral studies have been carried out.
NLO, Gamma-glycine