Growth, structural, optical, thermal and dielectric properties of a novelsemi-organic nonline ar optical crystal: Dichloro-diglycine zinc II |
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Authors: | B. Um Rajnikant K. Sakthi Murugesan S. Krishnan B. Milton Boaz |
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Affiliation: | Department of Physics, R.M.K. Engineering College, Kavaraipettai 601206, India;X-ray Crystallography Laboratory, Post-Graduate Department of Physics & Electronics, University of Jammu, Jammu Tawi 180006, India;PG and Research Department of Physics, Presidency College, Chennai 600005, India;Department of Physics, B.S.Abdur Rehman University, Vandalur, Chennai 600048, India;PG and Research Department of Physics, Presidency College, Chennai 600006, India |
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Abstract: | Dichloro-diglycine zinc II (DCDGZ II), a semi-organic nonlinear optical material has been synthesized and single crystals were grown from the aqueous solution up to dimensions 20×10×3 mm3. The title compound, DCDGZ II (C4H10Cl2N2O4Zn·H2O) crystallizes into monoclinic structure with the space group of C2/c. The unit-cell parameters were found to be a=14.4191(7), b=6.9180(2), c=12.9452(6) Å and Z=4. In the crystal structure, DCDGZ II layer is building up alternatingly with layers of water in which the zinc ions lie on a twofold axis. Theoretical calculations for polarizability, which are useful for device fabrication were made using Clausius–Mosotti equation and Penn analysis and the results were compared. Fourier transform infrared (FTIR) spectroscopic studies were performed for the identification of the different functional groups presented in the compound. The UV–vis–NIR absorption spectrum reveals that the lower UV cut-off wavelength is 240 nm. The optical band gap of the crystal was estimated as 2.2 eV. The surface morphology, thermal behaviour, dielectric properties have been studied using SEM, TG/DTA and LCR HITESTER analyzer. The nonlinear optical property of the crystal was also confirmed using Kurtz powder technique. |
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Keywords: | Crystal structure Growth from solutions Characterization Non-linear optic materials |
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