Amino acids family crystals exhibit excellent nonlinear optical and electro optical properties. L-Isoleucine D-Norvaline single crystals belongs to the amino acid group and has been grown from aqueous solution by slow evaporation solution growth technique at room temperature. The crystals were obtained after a period of 45 days. The compound crystallizes in the noncentrosymmetric space group C2 of the monoclinic system. Powder X-ray diffraction analysis revealed the crystallinity of the grown crystal. Infra-red and Raman spectroscopy techniques were used to elucidate the vibrational behaviour of chemical bond and its functional groups present in the compound. TGA was carried out to ascertain the thermal stability of the crystals. Optical absorption spectrum was recorded in the wavelength region of 200 nm to 1400 nm. The optical band gap of the grown crystal was found to be 4.78eV. The SHG efficiency of LIDNV crystals was examined by Kurtz powder method.
Dr. Geetha Srikanth, Niranjana, S. R., Pari, S., Joseph, M., and Raj, V. Antony, “Structural, vibrational, optical and dielectric studies on L-Isoleucine D-Norvaline”, Research Journal of Pharmaceutical, Biological and Chemical Sciences, vol. 7, no. 3, pp. 2371-2376, 2016.