Synthesis, Crystal Growth, Structural, Optical, Thermal and Mechanical Properties of Semiorganic Nonlinear Optical Material: L-Cystine Dihydrochloride

Abstract

L-Cystine dihydrochloride, a semiorganic nonlinear optical material, was synthesized and a single crystal was grown from aqueous solution. Low temperature (173 K) crystal structure measurement was carried out, and it reveals that the crystal belongs to noncentro symmetric space group C2. The structural perfection of the grown crystal was analyzed by high-resolution X-ray diffraction (HRXRD) rocking curve measurements. Fourier transform infrared (FTIR) spectroscopic studies were also performed for the identification of different vibrational modes of the fundamental groups present in the compound. The UV–vis transmission spectrum was recorded in the range 200–1000 nm. The second harmonic conversion efficiency was determined using the Kurtz powder technique; which is 0.35 times that of KDP. Thermal properties of LCystine Dihydrochloride were studied by TGA and DTA.