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

Abstract

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.

Isosteric Replacement of Sulfur to Selenium in a Thiosemicarbazone: Promotion of Zn(II) Complex Dissociation and Transmetalation to Augment Anticancer Efficacy

“…Syntheses of PPTP4c4mT and PPTP4c4mSe were achieved by a Schiff base condensation of the parent chalcone with 4cyclohexyl-4-methyl-3-thiosemicarbazide and 4-cyclohexyl-4methyl-3-selenosemicarbazide, respectively (Figure 1I). The selenosemicarbazide was prepared using a modified protocol of Abdulnabi et al 42 The Fe(III) complexes were isolated in their monocationic form, [Fe(PPTP4c4mX) 2 ] + , where both ligands are deprotonated by the addition of 2 equiv of Et 3 N.…”

“…Preparation of 4-Cyclohexyl-4-methyl-3-selenosemicarbazide (4c4mSe). This compound was synthesized using a modified method reported by Abdulnabi et al 42 Methyl iodide (3 mL, 48 mmol) was added dropwise to a solution of 4-cyclohexyl-4-methyl-3-thiosemicarbazide (3 g, 16 mmol) in 30 mL of ethanol. The reaction was refluxed at 100 °C for 2 h and the methylated product obtained in solution.…”

Synthesis, Thermal Analysis, and Thermodynamic Properties Study of New Quinoline Derivative and Their V(IV), Co(II), and Cu(II) Complexes

“…All the spectra were attributed to the C-Cl group. As for the bonding of the ligands with transition metals, the bands showed a stretching vibration in the region of 522-561 cm −1 [16][17]. However, no broad band of stretching vibration of the O-H group was observed for the ligand QH, indicating the formation of complexes.…”

Solid phase-fabrication of multi-walled carbon nanotubes and their derivatives for efficient extraction and analysis of Bismarck Brown-Y Dye from aqueous solution

“…The resultant mixture was centrifuged at 2500 rpm to separate it. After multiple washes with DMF-Methanol solution and DW, the black precipitate was produced after drying it for 10 hours at 70℃ [29].…”