Add time:08/19/2019         Source:sciencedirect.com

Nonlinear optical single crystal of α-L-Histidine dihydrochloride (α-LHDC) and β-L-Histidine dihydrochloride (β- LHDC) was synthesized by saturated solution was prepared at room temperature and it was kept at room temperature for the slow evaporation. The grown crystals were characterized using single crystal X-ray diffraction analysis, which shows that the (α- LHDC and β-LHDC crystals) crystal are belongs to monoclinic and orthorhombic in structure. The FTIR spectrum conformed the functional group presents in the α -LHDC and β-LHDC crystals crystal. The emission of green light with the use of Nd:YAG laser using the first harmonics output of 1064 nm with a pulse width of 8ns. The DTA analyses of both crystals confirm that t here is no exothermic or endothermic peak below 190C. Hence, it could be concluded that α and β forms of LHDC are thermally stable up to 191C and 220oC respectively.

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