• S.Kumaresan
• S.Murugannantham
• G. Kanagan
• M. Kandasamy,S. Pari
• G. Govindarajan,R. Sambasivam

A novel semi-organic NLO material L-Threonine Potassium Iodide (LTPI) has been synthesized by slow evaporation method. Single X-ray diffraction study shows that the grown crystal is orthorhombic structure with the noncentro symmetry space group P212121. Powder XRD is also studied from which the sharp peak crystalline nature and hkl plane was identified. The FT-IR spectra are carried out for reveals various functional groups in the crystal have been derived. UV-vis-NIR studying has been performed within 200-1100 nm to determine the optical transparency of the grown LTPI crystal. The fluorescence spectra studies recorded of wavelength 300-700 nm and colour of emission, region reported. The molecular structure of grown LTPI crystal was verified by 1H NMR analysis. The dielectric constant and dielectric loss of LTPI crystal was carried out as a function of frequency and the obtained result are discussed. Second harmonic generation efficiency of the grown sample was evaluating by Kurtz-Perry method, which yield an efficiency of 1.4 times better than KDP.

Crystal growth, L-Threonine Potassium Iodide crystal, XRD, FT-IR, UV-vis-NIR, 1H NMR, Dielectric, SHG studies.

"CRYSTAL GROWTH AND SOME OPTICAL AND ELECTRICAL STUDIES OF NLO L-THREONINE POTASSIUM IODIDE CRYSTAL", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.250-258, June 2019, Available :http://www.jetir.org/papers/JETIR1907J35.pdf

"CRYSTAL GROWTH AND SOME OPTICAL AND ELECTRICAL STUDIES OF NLO L-THREONINE POTASSIUM IODIDE CRYSTAL", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp250-258, June 2019, Available at : http://www.jetir.org/papers/JETIR1907J35.pdf