Publications by authors named "Maged S Al-Fakeh"

Natural polysaccharides play a crucial role across diverse fields such as medicine, food, and cosmetics, for their various physiochemical and biological properties. In this study, we developed a new crosslinked biopolymer using sodium alginate (AG) and carrageenan (CAR) polysaccharides. Various metal complexes involving different metal salts such as CoCl·6HO and CrCl·6HO were synthesized using the crosslinked biopolymer formed above.

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Article Synopsis
  • The text references a correction made to an article identified by its DOI number: 10.1155/2024/9198129.
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A new synthesis of mixed ligand complexes vanadium(III), iron(III), and nickel(II), [M : L1 : L2], where L1 = Schiff base 2-((E)-((4-(((E)-benzylidene)amino)phenyl)imino)methyl)-naphthalene-1-ol (CHNO) as for L2 = AMPY 2-amino-4-methyl pyrimidine (CHN) were prepared in powder and investigated. Element analysis, molar conductivity, FT-IR, UV-vis, and magnetic susceptibility values have been acquired to describe the generated complexes. The values of vanadium(III), iron(III), and nickel(II) compounds are, respectively, 2.

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Natural polysaccharides are essential to a wide range of fields, including medicine, food, and cosmetics, for their various physiochemical and biological properties. However, they still have adverse effects limiting their further applications. Consequently, possible structural modifications should be carried out on the polysaccharides for their valorization.

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A new class of biologically active mineral complexes was synthesized by reacting the following metal salts: MnCl·4HO, CoCl·6HO, CuCl·2HO, CrCl·6HO, and PdCl respectively with 2-amino-4,6-dimethyl pyrimidine (ADMPY) and Schiff's base resulting from the condensation reaction between benzaldehyde with -phenylenediamine and 2-hydroxy-1-naphthaldehyde as ligands have been synthesized and characterized on the basis of their CHN, thermal analysis, XRD, SEM and magnetic measurements along with their FT-IR and UV-vis spectra. The scanning electron microscope SEM measurements and the calculations on the powder XRD data indicate the nano-sized nature of the prepared complexes (average size 32-88 nm). The spectral data confirmed the coordinated ligand (HL) via a nitrogen atom of an azomethine group (-C=N-) and phenolic -OH group and NH-ADMPY ligand with the metal ions.

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Due to their unique physicochemical characteristics, palladium nanoparticles (Pd-NPs) have shown tremendous promise in biological applications. The biosynthesis of Pd-NPs employing Saudi propolis has been designed to be environmental, fast, controlled, and cost-effective. The formation and stability of biosynthesized Pd-NPs by Saudi propolis extract were proved by ultraviolet-visible spectrophotometry (UV-Vis), Fourier-transform infrared spectroscopy (FT-IR), and Zeta potential analysis.

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Four of the coordination compounds of the general formula, [M(DPPP)(APY)(HO) Cl].xHO, where  = Ni(II), Cu(II), Mn(II), and Fe(II) and  = 0, 1, or 2 molecules of HO, DPPP = 1,3-bis(diphenylphosphino)propane, and APY = 2-aminopyridine, have been prepared and characterized. The structure of the complexes has been confirmed by elemental analysis, FT-IR, and UV-Vis spectral data.

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Cobalt oxide nanoparticles (CoO NPs) were synthesized by the calcination method from the Co (II) complex which has the formula [Co(PVA)(-ABA)(HO)], PVA = polyvinyl alcohol, and -ABA = -aminobenzoic acid. The calcination temperature was 550°C, and the products were characterized by element analysis, thermal analyses (TGA and DTA), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), UV-Vis spectra, and scanning electron microscopy (SEM) techniques. The kinetic and thermodynamic parameters (∆H  , ∆G  , and ∆S  ) for the cobalt (II) complex are calculated.

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In this work, a new porphyrin, 5,10,15,20-tetrakis{4-[((4-methoxyphenyl)acetyl)oxy]phenyl}porphyrin (HTMAPP) (1), and its cobalt complex [Co(TMAPP)] (2) were synthesized in good and quantitative yields, respectively. The chemical structures of these synthesized compounds were confirmed by FT-IR, H NMR, MS, UV-visible, and fluorescence spectroscopy. Their photophysical properties, namely their molar extinction coefficients (), fluorescence quantum yields ( ) and lifetimes ( ), were determined and compared with those of -tetraphenylporphyrin.

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