41 research outputs found

    Crystal growth, structural, optical and dielectric studies of ammonium p-toluenesulfonate

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    Ammonium p-toluenesullonate single crystals (AMPTS) were grown by a slow cooling solution growth technique. The unit cell parameters and morphology of AMPTS crystal were found out by single crystal X-ray diffraction study. High-resolution X-ray diffraction study revealed the crystalline perfection and the absence of structural grain boundaries. UV-vis-NlR transmission studies revealed that the AMPTS crystal is transparent in the entire visible region with a lower optical cut-off wavelength of 278 nm. From the thermogravimetric and differential thermal analyses, the melting point of AMPTS crystal was found to be 145 degrees C. The single and multiple shots laser damage thresholds of AMPTS crystal were found to be 4.08 and 3.18 GW/cm(2) respectively, for 1064 nm wavelength of Nd:YAG laser radiation. The relative second harmonic generation efficiency of AMPTS was found to be 0.7 times that of KDP. The three independent dielectric tensor components epsilon(11)=86.56-44.32, epsilon(22)-83.80-4144 and epsilon(33)=82.03-42.67 were calculated from the dielectric measurement studies

    2-Carboxypyridinium maleate

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    2-Carboxylatopyridinium–4-nitrophenol (1/1)

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    In the title 1:1 adduct, C6H5NO3·C6H5NO2, both molecules are almost planar (r.m.s. deviations for the non-H atoms = 0.027 and 0.023 Å for 4-nitrophenol and 2-carboxylatopyridinium, respectively). The pyridine molecule crystallizes as a zwitterion (nominal proton transfer from the carboxylic acid group to the N atom in the ring). In the crystal, inversion dimers of the zwitterions linked by pairs of N—H...O hydrogen bonds generate R22(10) loops; two 4-nitrophenol molecules link to the dimer by O—H...O hydrogen bonds, generating a four-molecule aggregate. These are linked by C—H...O interactions, forming a three-dimensional network

    1-Hydroxyisoquinolin-2-ium hydrogen succinate

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    In the title salt, C9H8NO+·C4H5O4−, the isoquinolinium ring system is approximately planar [r.m.s deviation = 0.011 (2) Å]. In the crystal, adjacent cations and anions are linked by O—H...O and N—H...O hydrogen bonds, forming columns along the b axis. The columns are connected by weak C—H...O interactions into a three-dimensional network

    Studies on growth, structural, optical and mechanical properties of xylenol orange dye admixtured L-arginine phosphate single crystal

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    Bulk single crystals of pure and xylenol orange (XO) admixtured L-arginine phosphate (LAP) were grown by slow cooling technique. The cell parameters and crystallinity of pure and dye admixtured LAP crystals were confirmed by single crystal and powder X-ray diffraction analyses. HRXRD analysis reveals the presence of xylenol orange dye in interstitial site of LAP crystal lattice and it confirms the crystalline perfection of grown crystals. The functional groups of grown crystals were confirmed by FTIR spectral analysis. UV-vis transmission studies show the characteristic absorption of xylenol orange admixtured LAP crystal. Vickers' microhardness and laser damage threshold studies were carried out on these crystals. Kurtz and Perry powder test was conducted to measure the second harmonic generation efficiency of pure and dye admixtured LAP crystals

    Growth, structural, optical and laser damage threshold studies of organic picolinium picrate monohydrate single crystals

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    Picolinium picrate monohydrate (PPM), an organic optical material, was synthesized and single crystals were grown by slow evaporation solution technique. The cell parameters of PPM were confirmed by single crystal X-ray diffraction analysis. The PPM crystals were subjected to FT-IR spectral analyses to confirm the synthesized compound. UV-vis-NIR spectral studies revealed that the optical transparency window of PPM crystal spreads over in the visible and NIR (480-900 nm) regions. From the transmittance data, the optical band gap as function of photon energy was estimated. The microhardness studies were carried out on PPM crystal. The laser damage threshold of PPM crystal was measured using Nd:YAG laser

    Studies of structural, third order nonlinear optical and laser damage threshold properties of diethylammonium p-hydroxybenzoate single crystal

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    Diethylammonium p-hydroxybenzoate (DEPH) single crystals were grown by a slow evaporation solution growth technique. High-resolution X-ray diffraction rocking curve measurements revealed the crystalline perfection of the grown crystals and the absence of structural grain boundaries. UV-visible transmission studies revealed the lower optical cut-off wavelength of the DEPH crystals. Third order nonlinear refractive index (n (2)), nonlinear absorption coefficient (beta) and susceptibility (chi (3)) parameters were estimated by Z-scan studies. The single- and multiple-shot laser damage threshold values of the grown crystals were found to be 7.1 and 6.9 GW/cm(2) using a Nd:YAG laser
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