Synthesis, Characterization and Thermogravimetric Study of Some Metal Complexes of Selenazone Ligand Nanoparticles Analogue of Dithizone

Zuhair Ali Abdulnabi(1*), Faris Abdulridhah Jassim Al-doghachi(2), Hassan Thamir Abdulsahib(3)

(1) Department of Marine Chemistry, Marine Science Center, University of Basrah, 61004, Basrah, Iraq
(2) Department of Chemistry, Faculty of Science, University of Basrah, 61004, Basrah, Iraq
(3) Department of Chemistry, Faculty of Science, University of Basrah, 61004, Basrah, Iraq
(*) Corresponding Author


A new method for preparing 1,5-diphenylselenocarbazone (selenazone) nanoparticles and their complexes with Pb2+, Cd2+, Co2+, and Ni2+ has been performed using hot methanol solvent. The ligand and its complexes were characterized using FT-IR, UV-Vis, 1H-NMR, 13C-NMR, X-ray powder diffraction (XRD), EI-mass spectrometry, scanning electron microscopy (SEM), HG and flame-atomic absorption spectrophotometer, thermal analysis (TG/DTA), and molar conductance measurements. The molar conductance measurements in all complexes were recorded low values in DMSO, indicating that all the metal complexes were non-electrolytes except the nickel complex that possessed an electrolytic nature. Kinetic and thermodynamic parameters of complexes (A, E, ∆H, ∆S, and ∆G) have been computed using three kinetic models of Coast-Redfern, Broido, and Horowitz-Metzger, that illustrated the decomposition reactions in all steps were nonspontaneous. Thermogravimetric analyses (TG/DTA) were consistent with the atomic spectroscopy data proving that the geometry shape of all the complexes was octahedral.


selenazone nanoparticle; thermal analyses; kinetic models

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