Synthesis, characterization and evaluation of optically active polar semi-organic glycine-cobalt chloride crystals

Fetouh, H.A; M. Mailoud, Ollaa; Hattawi, Salam N.; Khamis, Noha Mahmoud; S. Alsubaie, Mai; Alazmi, Mohammed; H Elsayed, Adly; Abu ELazm, AH; H. Alshammari, Riyadh

doi:10.21608/ajst.2024.309326.1044

	Synthesis, characterization and evaluation of optically active polar semi-organic glycine-cobalt chloride crystals
Alexandria Journal of Science and Technology
Article 10, Volume 2, Issue 2 - Serial Number 4, December 2024, Page 193-201 PDF (1.35 MB)
Document Type: Original Article
DOI: 10.21608/ajst.2024.309326.1044
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Authors
H.A Fetouh ¹; Ollaa M. Mailoud²; Salam N. Hattawi ³; Noha Mahmoud Khamis⁴; Mai S. Alsubaie⁵; Mohammed Alazmi⁶; Adly H Elsayed⁷; AH Abu ELazm⁷; Riyadh H. Alshammari⁸
¹Alexandria-Egypt El Shatbey
²Physics Department, Faculty of Science, Benghazi University, Benghazi 21861, Libya
³Northern technical university, college of health and medical techniquies, Department of renal diaylsis techniquies, Kirkuk, Iraq
⁴Chemistry, Faculty of Science, Alexandria University, Alexandria, Chemistry Department, University of Warwick, Coventry, CV4 7AL, UK
⁵Chemistry Department, Faculty of Science, Alexandria University, P.O. Box 426, Alexandria 21321, Egypt
⁶General Science Program-Deanship of Support Studies-Alasala University, Saudi Arabia
⁷Physics Department, Faculty of Science, Alexandria University, Alexandria 21321, Egypt
⁸Chemistry Department, Faculty of Science, King Saud University, Riyadh 11421- P. O. Box 800, Saudi Arabia
Abstract
Semi organic crystals of glycine Cobalt Chloride (GCC) exhibiting diverse colors were grown using the slow solvent evaporation method. The molecular structure was validated by characterization using various techniques, including Fourier-transform Infrared spectroscopy (FTIR), Mass spectra (MS), Atomic absorption spectroscopy (AAS), and powder X-ray diffraction (pXRD). Depending on the molar concentration of CoCl2, the crystals exhibited a monoclinic structure with space group P21/c at low concentration and a tetragonal structure with space group P43212 at high concentration. UV-Vis. spectral analysis revealed a decrease in the lower cut-off wavelength and an increase in the band gap from 5.779 eV to 5.929 eV with the augmentation of CoCl2concentration. Thermal analysis (gravimetric and differential scanning calorimetery indicated that the crystals maintain stability up to 250°C. Furthermore, the dielectric properties exhibited temperature and frequency nonlinear dependence confirming ferroelectric, piezoelectric characteristics and polarity. The good crystals' showed nonlinear optical activity and transparency in the Vis. light confirmed the possible application in the second harmonic generation.
Keywords
Slow evaporation; polar; band gap; dielectric properties
Supplementary Files Supporting information.docx

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