Optical and microhardness studies of semiorganic nonlinear optical material: L- histidine tetrafluoroborate by Jayaraman Ramajothi, Sivasubramanian Dhanuskodi

Crystal Research and Technology

Cryst. Res. Technol. 38, 986 (2003) - Abstract -

Optical and microhardness studies of semiorganic nonlinear optical material: L- histidine tetrafluoroborate

Jayaraman Ramajothi, Sivasubramanian Dhanuskodi

Department of Physics, Bharathidasan University, Tiruchirappalli - 620 024, India

Keywords	single crystal, NLO material, FT-IR, FT-Raman, microhardness
PACS	42.70Hj, 81.10Dn, 81.10Aj
DOI	10.1002/crat.200310125

L-histidine tetrafluoroborate (L-HFB) a semiorganic nonlinear optical material has been synthesized in aqueous solution at 50慢 and characterized by FT-IR and FT-Raman spectroscopy studies. The solubility was determined in different solvents such as water, methanol and water mixture of methanol. The single crystals with dimensions 15x12x3 mm³ were grown by slow evaporation method within four weeks with approximate growth rate of 0.25 mm/day. The grown crystals have been subjected to single crystal X-ray diffraction studies to determine the unit cell dimensions and morphology. The Kurtz powder second harmonic generation test shows that the compound is a potential candidate for frequency conversion. The refractive index has been measured using He-Ne laser. The microhardness test was carried out and the load dependence hardness was observed. The material has a wide transparency in the entire visible region.

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