Synthesis, growth, and characterization of nonlinear optical material L-arginine iodate crystal

摘要

Single crystals of nonlinear optical L-arginine iodate (L-Arg·2HIO_3) (C_6H_(14)N_4O_2·2HIO_3), were successfully grown for the first time by the temperature-lowering method and also by the slow evaporation method at a constant temperature (30 ℃) from its aqueous solution at pH value of 6. Crystals were of average dimensions 3 × 2.5 × 1.0 cm~3 by optimizing the growth parameters. Initially, solubility studies were carried out for four different solvents such as water, water-methanol, water-ethanol, and water-acetone. Among the four solvents, the solubility of L-Arg·2HIO_3 was found to be the highest in water and hence crystallization of L-Arg·2HIO_3 was carried out from aqueous solution. Morphology studies reveal that the crystals grow with reasonable growth rate along the [100], [001], [110] and [011] direction. As-grown crystals were characterized by density measurement, X-ray powder diffraction studies, infrared spectrophotometer, UV-Vis spectrometer, laser induced damage threshold studies and nonlinear optical study.