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Publication Date
Wed Nov 04 2020
Journal Name
Journal Of Physical Organic Chemistry
Volume
34
DOI
10.1002/poc.4156
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Articles
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Preparation, spectroscopic study of Schiff base derived from dopamine and metal Ni(II), Pd(II), and Pt(IV) complexes, and activity determination as antioxidants
May J. Kareem
Abbas Ali Salih Al–Hamdani
Vian Yamin Jirjees
Mohammad Ehtisham Khan
Abdul Wahab Allaf
Wail Al Zoubi
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Abstract<p>A new Schiff base (HL<sub>2</sub>) ligand (4‐{2‐[(2‐hydroxy‐benzylidene)‐amino]‐ethyl}‐benzene‐1,2‐diol) has been synthesized by condensing of 4‐(2‐amino‐ethyl)‐benzene‐1,2‐diol and 2‐hydroxy‐benzaldehyde. In turn, its transition metal complexes were prepared, having the following general formulas: Ni(L<sub>2</sub>)<sub>2</sub>, Pd(L<sub>2</sub>)<sub>2</sub>, and Pt(L<sub>2</sub>)<sub>2</sub>2Cl. The prepared ligand and its metal complexes Ni(II), Pd(II), and Pt(IV) have been characterized by Fourier transform infrared (FTIR) spectra, proton nuclear magnetic resonance (<sup>1</sup>H‐NMR) elemental analysis, metal content, chloride content, molar conductance, ultraviolet–visible (UV–Vis) spectra, magnetic susceptibility, mass spectrometry (MS) spectra, and thermogravimetric analysis (TGA). The consequences proposed that Schiff base acts like a bidentate ligand for all the prepared complexes. The antioxidant performance of as‐prepared compounds was inspected using the DPPH radical scavenging method. The compounds showed antioxidant activities of scavenging free radicals.</p>
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Publication Date
Tue Jan 18 2022
Journal Name
Materials Science Forum
The Effect of Gamma Radiation on the Manufactured HgBa&lt;sub&gt;2&lt;/sub&gt;Ca&lt;sub&gt;2&lt;/sub&gt;Cu&lt;sub&gt;2.4&lt;/sub&gt;Ag&lt;sub&gt;0.6&lt;/sub&gt;O&lt;sub&gt;8+δ&lt;/sub&gt; Compound
Gamma doses radiation
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strain
degree of crystallinity
Scherrer
crystallinity and Williamson equations.
zainab j
Balqees A.
Mohammed A.
Kareem A.
Auday H.
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In this article four samples of HgBa2Ca2Cu2.4Ag0.6O8+δ were prepared and irradiated with different doses of gamma radiation 6, 8 and 10 Mrad. The effects of gamma irradiation on structure of HgBa2Ca2Cu2.4Ag0.6O8+δ samples were characterized using X-ray diffraction. It was concluded that there effect on structure by gamma irradiation. Scherrer, crystallization, and Williamson equations were applied based on the X-ray diffraction diagram and for all gamma doses, to calculate crystal size, strain, and degree of crystallinity. I

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