TITLE:
Studies on L-valinium Picrate Single Crystal: A Promising NLO Crystal
AUTHORS:
T. Uma Devi, N. Lawrence, R. Ramesh Babu, K. Ramamurthi, G. Bhagavannarayana
KEYWORDS:
X-ray diffraction, Growth from solutions, Organic compounds, Non-linear optical materials
JOURNAL NAME:
Journal of Minerals and Materials Characterization and Engineering,
Vol.8 No.5,
May
20,
2009
ABSTRACT: L-valinium picrate, an organic material, was synthesized and grown by solution growth method.
Cell parameters of the grown crystals were obtained from the single crystal X-ray diffraction
analysis and the presence of functional groups was identified by FTIR study. The quality of the
crystal was also examined by high-resolution X-ray diffraction study. Its optical properties were
examined by UV-Vis-NIR analysis, which shows that the crystal is transparent between the
wavelengths 400 and 1000 nm. Thermal analysis carried out for the L-valinium picrate exhibits
a single sharp melting point at 269 °C. The Vicker’s microhardness values were measured for
the grown crystal. Relative powder second harmonic generation efficiency tested by high
intensity Nd: YAG laser as a source is about 60 times greater than that of potassium dihydrogen
phosphate.