"Crystal growth, structural, spectral and NLO studies of L-histidine sodium chloride crystals"


S. Sudharthini
Research Scholar, S. T. Hindu College, Nagercoil-629002, Tamilnadu, India.
Assistant Professor, Francis Xavier Engineering College, Tirunelveli-627003, Tamilnadu, India, (Affiliated to Manonmaniam Sundaranar University, Abishekapatti-627012, Tirunelveli, Tamilnadu, India)

P. Selvarajan, Aditanar College of Arts and Science, Tiruchendur-628216, Tamilnadu, India.

C. Gnana Sambandam, S. T. Hindu College, Nagercoil-629002, Tamilnadu, India.


Nonlinear optical (NLO) crystals are useful in generating UV and visible laser light and hence they are called laser crystals and have applications in laser technology, opto-electronics, optical communication and optical computing. NLO crystals can be mainly classified into organic, inorganic and semiorganic NLO materials. In this work, a semiorganic NLO crystal viz., L- histidine sodium chloride (LHSC) has been grown by slow evaporation technique. The grown crystals were transparent and white in color. The solubility study has been carried out in the temperature range 30 oC-50oC in double distilled water. The lattice parameters of the grown crystals were obtained by single crystal X-ray diffraction technique. The presence of the functional groups in the crystal lattice was confirmed by Fourier Transform Infrared (FTIR) spectral analysis. The UV-visible spectral studies were carried out to find the transmittance and other optical parameters. The presence of elements in the grown crystal was identified by EDAX studies. The TG/DTA studies of the sample were performed to find the thermal stability. Other studies like SHG, LDT and photoluminescence studies for LHSC crystals were also carried out and the obtained results have been discussed.