The Open Crystallography Journal

2008, 1 : 46-50
Published online 2008 October 31. DOI: 10.2174/1874846500801010046
Publisher ID: TOCRYJ-1-46

Growth and Characterization of a New Organic Non-Linear Optical (NLO) Material: L-Histidinium Trifluoroacetate

S.A. Martin Britto Dhas , J. Suresh , G. Bhagavannarayana and S. Natarajan
Department of Physics, Madurai Kamaraj University, Madurai-625021, India.

ABSTRACT

A new organic nonlinear optical (NLO) material L-Histidinium trifluoroacetate was crystallized using LHistidine and trifluoroacetic acid in 1:1 stoichiometric ratio in water-ethanol medium. X-ray diffraction analysis of the single crystals showed that they belong to triclinic system, space group P1, with two molecules per unit cell. The lattice parameters are a = 5.1673(2) Å, b = 8.8393(3) Å, c = 12.4837(6) Å, 􀀁 = 96.190(3)°, 􀀂= 100.020(3)° and 􀀃 =102.010 (3)°. The molecules are held together by a three-dimensional network of hydrogen bonds. The crystalline perfection was studied by high resolution X-ray diffraction. The second harmonic generation (SHG) efficiency was measured by Kurtz and Perry method. The FTIR, UV-Vis-NIR spectra and TGA/DTA were recorded and studied. Vickers microhardness measurement was also carried out.