Abstract
Single crystals of l-threonine, a nonlinear optical material, have been grown from solution by the temperature lowering technique. l-threonine was found to have extremely high solubility in water. Hence it was feasible to grow bulk crystals of l-threonine in aqueous solution. The cell parameters were estimated by powder X-ray diffraction analysis. The vibrational structure of the molecule is elucidated from FT-IR and FT-Raman spectra. Thermal analysis was performed to study the thermal stability of the grown crystals. The transmission spectra of l-threonine show that the lower UV cutoff wavelength lies at 220 nm. Kurtz powder SHG measurements confirm the NLO property of the grown crystal. Microhardness studies have also been carried out on l-threonine crystals.
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