TITLE:
Influence of Picric Acid on the SHG Efficiency of L-Prolinium Tartrate Crystals
AUTHORS:
S. Natarajan, K. Moovendaran, J. Kalyana Sundar, G. Bhagavannarayana, S.A. Martin Britto Dhas
KEYWORDS:
organic compounds; crystal growth; X-ray diffraction; thermo-gravimetricanalysis
JOURNAL NAME:
Journal of Minerals and Materials Characterization and Engineering,
Vol.10 No.10,
August
10,
2011
ABSTRACT: Single crystals of the NLO material L-Prolinium tartrate (LPT) have been grown in the
presence and absence of picric acid, by slow evaporation technique. Good quality crystals
were harvested within 30 days. The grown crystals were characterized by single crystal X-ray
diffraction. The quality of the crystals grown in the presence and absence of picric acid was
examined by high resolution X-ray diffractometry (HRXRD). Fourier transform infrared
spectroscopy (FTIR) and Fourier transform Raman spectroscopy were used to confirm the
presence of the functional groups of L-Prolinium tartrate and the absence of picric acid in
the crystals. The thermal stability and the trend of decomposition of the grown crystals were
analyzed by thermo gravimetric analysis (TGA). The influence of picric acid on the second
harmonic generation efficiency was studied by Kurtz and Perry method. It was observed that
the SHG efficiency increased by about 2.3 times compared to that of normal LPT crystals.
The results are discussed in detail.