Synthesis, growth and characterization of a new nonlinear optical crystal: l-arginine maleate dihydrate by Tapati Mallik and Tanusree Kar

Crystal Research and Technology

Cryst. Res. Technol. 40, 778 (2005) - Abstract -

Synthesis, growth and characterization of a new nonlinear optical crystal: l-arginine maleate dihydrate

Tapati Mallik and Tanusree Kar

Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India

Keywords	solubility, characterization, growth from solutions, organic compounds, nonlinear optical materials
PACS	42.70.Mp, 81.10.-h
DOI	10.1002/crat.200410430

A new nonlinear optical material L-arginine maleate dihydrate,C₆H₁₄N₄O₂, C₄H₄O₄, 2H₂O (LAMD) was synthesized and single crystals were grown by slow cooling and also by slow evaporation method at constant temperature from its aqueous solution. Quality and size of the crystals are found to be dependent on pH of the solution and best crystals were obtained at pH=4. Single crystal X-ray diffraction analysis reveal that the crystal lattice of LAMD is triclinic with unit cell parameters a= 5.264(3)Å, b=8.039(3)Å, c= 9.784(3)Å, α=106.19(3)°, β=97.24(3)°, γ=101.66(2)°. Second harmonic generation efficiency is found to be about 6.8 times that of quartz. It is optically transparent down to 300 nm and possesses a large optical window between 300-2000 nm. The compound is thermally stable up to 93.4°C.

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