RESUMO
Sodium acetate doped L-tyrosine single crystal with dimensions 47×15×8 mm(3) was grown by slow evaporation solution growth technique. Nucleation kinetics of the growth of the material was studied to optimize the growth conditions. The grown doped crystal was then characterized using single crystal XRD, UV-vis-NIR, FTIR, NMR, SEM-EDAX and NLO studies. XRD study reveals that the grown crystal belongs to monoclinic system with space group P21. Lattice parameters of the grown crystals are found to be a=5.096 Å, b=8.966 Å, c=11.088 Å, α=ß=90° and γ=92.035°. The transparent range of the grown crystal was measured as 260-1100 nm with 260 nm as lower cut off wavelength using UV-vis-NIR absorption spectrum and the optical band gap was evaluated as 3.24 eV from the Tauc's plot. The various functional groups were identified using FTIR spectral analysis. The thermal behavior of the title compound has been analyzed using TGA/DTA and DSC thermal curves. From the thermal study, the material is found to possess thermal stability up to 158°C. The microstructure of the grown crystal and the presence of various elements in the crystal were analyzed using SEM and EDAX techniques. NMR spectral analysis confirms the molecular structure of the grown compound. The nonlinear optical property was tested using Kurtz Perry powder technique and SHG efficiency was measured nearly same as that of KDP.
Assuntos
Dinâmica não Linear , Fenômenos Ópticos , Acetato de Sódio/química , Tirosina/química , Varredura Diferencial de Calorimetria , Cristalização , Microscopia Eletrônica de Varredura , Espectroscopia de Prótons por Ressonância Magnética , Solubilidade , Espectrometria por Raios X , Espectrofotometria Ultravioleta , Espectroscopia de Infravermelho com Transformada de Fourier , Espectroscopia de Luz Próxima ao Infravermelho , Termogravimetria , Difração de Raios XRESUMO
The organometallic nonlinear optical material Dichlorobis (l-proline) zinc (II) (DCBPZ) was crystallized using solution growth technique. XRD data reveal that the grown crystal belongs to orthorhombic system with space group P212121. The crystals were characterized using UV-vis-NIR, FTIR and NMR spectral studies, SEM-EDAX analysis and Atomic force microscopy (AFM), thermal and microhardness studies. Photoconductivity measurements were made to understand the response of the grown material to the visible light. The SHG efficiency of DCBPZ was also measured using Kurtz and Perry powder technique. It is observed that the NLO activity of DCBPZ is found to be twice that of KDP due to improved linear and nonlinear optical properties of the material.
