Growth and characterization of new semi-organic l-proline strontium chloride monohydrate single crystals (original) (raw)
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Crystal Growth & Design, 2009
A new organic nonlinear optical material 3-(4-chlorophenyl)-1-(pyridin-3-yl) prop-2-en-1-one (CPP) having high second harmonic generation efficiency has been synthesized by a Claisen-Schmidt condensation reaction method. Single crystals of CPP were grown by a slow evaporation solution growth technique. The details about the various functional groups present are obtained by FTIR, FT-Raman and 1 H NMR spectroscopic studies. The single-crystal X-ray diffraction (XRD) shows that CPP crystallizes in a monoclinic crystal system with noncentrosymmetric space group P2 1 and the cell parameters are a¼5.9339(2) Å, b¼4.8881(2) Å, c¼19.7804(8) Å and V¼568.21(4) Å 3 . The second harmonic generation (SHG) efficiency of the crystal is 3.67 times that of Urea. The molecular dipoles aligned in zig-zag head to tail fashion along the crystallographic b-axis result in a net polarization and hence large SHG conversion efficiency. From UV-visible study it is found that the crystal is transparent in the entire visible region. The energy band gap of the material is found using Tauc's plot and by a direct method. The molecular origin of SHG efficiency is discussed in detail based on the experimental results. The position of nitrogen atom in the pyridine ring has considerable effect on the NLO response of the chalcone derivatives. The crystal is thermally stable up to 133 1C and can be used for NLO device applications.
Arabian Journal of Chemistry, 2015
L-Proline Lithium Chloride Monohydrate single crystal has been successfully synthesized and grown by slow evaporation solution technique. The lattice dimensions have been calculated by single crystal XRD. The presence of strain present inside the crystal has been evaluated by powder X-ray diffraction. Its crystalline perfection was found to be good with the full width at half maxima of 29.31 arc sec. The crystal quality can further examined by time resolve photoluminescence spectroscopy. The dielectric constant and dielectric loss has been measured over the frequency range of 10 Hz to 10 KHz. The curve plotted during the measurement suggests that the value of dielectric constant decreases at higher frequency which ensures that the crystal is good candidate for NLO devices. The laser damage threshold measurements have been performed for single and multiple shots which reveal that the tolerance power for the single shot is more as compared to multiple shots. Its third order non linearity and thermal parameters have also been assessed for the title compound. The interference patterns obtained from the birefringence studies infer the optical homogeneity and defects in the grown crystals. The density of the single crystal has been calculated by floating technique taking kerosene as a reference.
Growth and characterization of NLO active lithium sulphate monohydrate single crystals
Crystal Research and Technology, 2009
Single crystals of the NLO active lithium sulphate monohydrate were grown successfully by slow evaporation technique. The as-grown crystal was clear, transparent and the size of the crystal attained was 14 x 8 x 5 mm 3 within a period of 4 weeks. The crystal was subjected to Fourier transform infrared spectroscopy (FTIR), Thermal analysis (TG/DTA), UV-Vis analysis, mechanical and dielectric studies. Theoretical calculations for band gap energy were made. An attempt was made to calculate polarizability by Penn analysis and compare with the traditional method and results are tabulated.
Journal of Crystal Growth, 2012
Single crystals of negatively soluble lithium sulfate monohydrate (LSMH) have been grown by conventional and Sankaranarayanan-Ramasamy (SR) methods. A negatively soluble material has been grown for the first time by the SR method. The size of the grown crystal is 40 mm length and 15 mm diameter. The solubility of the material has been found at different temperatures. The grown crystals were subjected to high resolution X-ray diffraction studies, UV-vis analysis, dielectric measurements, Vickers micro-hardness, piezoelectric measurements, laser damage threshold and second harmonic generation studies. Crystalline perfection of the grown crystals was analyzed using HRXRD. The grown crystals were found to be transparent in the entire visible region. The SR method grown crystal has higher hardness, lower dielectric loss, higher piezoelectric charge coefficient and higher laser stability compared to the conventional method grown crystal. The powder Kurtz method confirms that LSMH has SHG efficiency.
Journal of Ovonic Research
From the raw materials L-Serine and oxalic acid, the product Bis-LSeriniumoxalatedehydrate(BLSOD) was created. By using a slow evaporation process, the individual BLSOD crystals were produced from aqueous solution. According to single crystal X-ray Diffraction investigations, the structure of the produced crystal is monoclinic. The existence of different functional groups and the chemical environment present in the synthesised material were qualitatively determined through the use of Fourier Transform Infra-Red (FTIR) and proton nuclear magnetic resonance (H1NMR) spectrum studies. The crystal's transparency in the visible and near-infra-red areas was confirmed by UV-Visible-Near infrared and photoluminescence spectrum tests, which also looked at the material's viability for device construction. To determine the crystal's machinability, the mechanical properties of the material were carefully examined using Vicker's hardness research. Thermal investigations such as Th...
Growth and Characterization of L-Alanine Oxalate Monohydrate Single Crystal
2017
A new semi-organic crystal of L-Alanine oxalate monohydrate has been grown from saturated solution by slow evaporation technique at room temperature. The grown crystal was confirmed by X-ray diffraction. The vibrational frequencies of various functional groups in the crystals have been derived from FTIR analysis. A wide transparency window useful for optoelectronic applications is indicated by the UV studies. The thermal behavior of the crystals has been investigated by TG/DTA analyses. The mechanical strength of the grown crystals was estimated by using Vicker’s microhardness studies. Second Harmonic Generation (SHG) efficiency of the powdered material of L-Alanine oxalate monohydrate (LAOM) tested by using Kurtz method. © 2017 Elixir All rights reserved. Elixir Crystal Research. 107 (2017) 47163-47166 Crystal Research Available online at www.elixirpublishers.com (Elixir International Journal) S.Muruganantham et al./ Elixir Crystal Research. 107 (2017) 47163-47166 47164 The filtere...
Journal of Crystal Growth, 2014
a b s t r a c t L-Proline lithium bromide monohydrate (LPLBM) was synthesized and its good quality bulk single crystals of size $ 55 Â 10 Â 8 mm 3 were grown for the first time. Structural analysis was carried out by using single crystal X-ray diffraction and confirms that the crystal belongs to monoclinic system with space group P2 1 . The lattice parameters of the titled compound was found to be a¼ 8.0347(7) Å, b ¼5.1469(4) Å, c¼ 10.6218 Å, α ¼γ¼ 901, β¼ 104.249(2)1 and unit cell volume V¼ 425.74(6) Å 3 . Elemental analysis was done by electron diffraction X-ray spectroscopy. Optical study shows that the grown crystals are highly transparent ( $ 80%) in entire testing range. Optical band gap was calculated and found to be 5.7 eV. DSC study shows that the grown crystals are thermally stable up to 273 1C and two low temperature phase transitions were observed at À 44.66 and 43.95 1C.