Studies on L-cystine hydrobromide single crystals for nonlinear optical applications

l-cystine hydrobromide (LCHBr) is a novel nonlinear optical material which has been synthesized and grown. The low-temperature solution growth technique was employed to grow the single crystal of LCHBr. The structure of the grown crystals was characterized by single-crystal XRD. The different functional groups of the grown LCHBr crystal are studied using FTIR spectroscopy. The transparent nature of the grown crystal was analysed by UV–Vis–NIR study. The mechanical strength of the grown crystal was analysed using microhardness study. The optical second harmonic generation conversion efficiency of the LCHBr crystal was studied using Nd:YAG laser. The laser damage threshold value of this grown crystal has been evaluated

(E)-4-Methoxy-N′-(2,4,5-trifluorobenzylidene)benzohydrazide monohydrate

The title Schiff base compound, C15H11F3N2O2·H2O, crystallized as a monohydrate. The conformation about the C=N bond is E. The molecule is almost planar, with the dihedral angle between the planes of the methoxybenzene and trifluorobenzylidene rings being 7.46 (6)°. In the crystal, molecules are linked by bifurcated Owater—H...(O,N) hydrogen bonds and N—H...Owater and Owater—H...O and C—H...O hydrogen bonds, forming chains along [100]. The chains are linked by C—H...Owater hydrogen bonds, forming slabs parallel to the bc plane. Within the slabs there are offset π–π interactions present [intercentroid distance = 3.7883 (7) Å]

Synthesis, growth and characterization of a nonlinear optical crystal: l-Leucinium perchlorate

An amino acid based semiorganic nonlinear optical family single crystal of l-leucinium perchlorate (LLPCl) was grown by the solvent evaporation method at ambient temperature. Good optical quality single crystals up to a size of 6 mm × 5 mm × 3 mm were obtained. The single-crystal XRD analysis shows that the grown crystals have a monoclinic structure. Fourier transform infrared (FTIR) spectral analysis and UV–vis spectral studies were also carried out. Microhardness mechanical studies show that the hardness number (Hv) of a LLPCl single crystal decreases with the load as measured by the Vickers microhardness method. The dielectric properties of the grown crystal were analysed by varying the frequency. Photoconductivity analysis gives the variation of the photocurrent and dark current. The nonlinear optical properties were studied using the Kurtz and Perry powder method and the second harmonic generation efficiency was found to be 2.6 times higher than that of KDP crystals