Abstract
New crystalline salts of L-threonine, i.e. L-Thr.HCl, and L-Thr.HBr have been obtained from aqueous solution by slow evaporation technique. Infrared and Raman spectra of L-Thr.HCl and L-Thr.HBr were recorded and interpreted on the basis of crystal structure of L-Thr.HCl. The similarity of their IR and Raman spectra indicates similar structures. Nonlinear optical properties of the crystals were tested qualitatively by observation of second harmonic generation of Nd:YAG laser.
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