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A vibrant non-linear optical single crystal of cadmium chloride doped L-alanine p-toluene sulfonic acid (LAPTCd) was grown by slow evaporation. XRD analysis was carried out and obtained the cell parameter for the grown crystal. The grown LAPTCd crystal belongs to the orthorhombic crystal system with non-centro symmetric space group P212121. The presence of the dopant was confirmed from an energy dispersive X-ray analysis. FT-IR and FT-Raman spectra were recorded and the presence of different functional groups and vibrations confirmed in the grown crystal. The UV–Vis–NIR absorption and transmittance spectrum shows that the crystal has a good optical transparency within the range 200–800 nm. The optical parameters have also been calculated, and it has a lower wavelength cutoff at around 235 nm. The optical energy band gap of the crystal was calculated from Tauc's Plot and it is 5.24 eV. The fluorescence spectrum of the crystal reveals that the excitation wavelength is 489.97 nm. The thermal stability and the melting point of the crystal were analyzed by TG/DTA. The efficiency of second harmonic generation of the LAPTCd crystal is found to be 0.7 times more that of KDP crystal. [ABSTRACT FROM AUTHOR]

Triglycinylzinc(II) chloride, [(Gly)3Zn]Cl2 (TGZC) and 3 mol-% of EDTA doped Triglycinylzinc(II) chloride (E-TGZC) single crystals were grown from aqueous solution by slow cooling technique. Single crystal and powder XRD analyses confirmed that the crystal belongs to orthorhombic structure with non-centro symmetric space group Pbn21. Solid state kinetics was carried out by dynamic and thermal analysis (TG, DTA and DTG) at different heating rates of 5, 13, and 20 K. Kinetics of decomposition of single crystals was studied by means of model-free method, Arrhenius, Kissinger and Iso-conversional method. The values of activation energy (E) and the pre-exponential factor (ln A) of thermal decomposition at various linear heating rates were calculated. Thus the difference in activation energy of TGZC and E-TGZC calculated by Kissinger method suggested that the dopant EDTA lowers the activation energy of the TGZC crystal by 35-45 + 4 kJ/mol which is the main cause for the rapid growth of the doped crystal. [ABSTRACT FROM AUTHOR]

Abstract: Non centrosymmetric potassium p-nitrophenolate dihydrate single crystals have been grown by employing the technique of slow solvent evaporation from aqueous solution by slightly adjusting the pH and growth temperature. The grown crystals have been identified from single crystal XRD analysis, FTIR and FT Raman spectroscopic techniques. The high resolution X-ray diffraction experiments substantiate good quality of the title material. Between 510 and 2000nm, the material is observed to be nearly transparent allowing it to be explored for potential use in device fabrication. In addition, the photoluminescence spectrum of the grown crystal at room temperature shows a stable broad violet-blue emission around the 383–550nm wavelengths with the maximum centered at 436nm. Owing to its excellent non linear figure of merit and strong PL emission, the title crystal can have technological applications in opto-electronic devices. [Copyright &y& Elsevier]