TITLE:
Synthesis, Crystal Growth, Structural, Optical, Thermal and Mechanical Properties of Semiorganic Nonlinear Optical Material: L-Cystine Dihydrochloride
AUTHORS:
T. Uma Devi, N. Lawrence, R. Rameshbabu, S. Selvanayagam, Helen Stoeckli-Evans, G. Bhagavannarayana, K. Ramamurthi
KEYWORDS:
crystal structure, amino-acid, coordination compounds, thermal properties
JOURNAL NAME:
Journal of Minerals and Materials Characterization and Engineering,
Vol.9 No.5,
May
20,
2010
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.