2022
DOI: 10.24996/ijs.2022.63.8.4
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Preparation and Characterization of New (Halogenated Azo-Schiff) Ligands with Some of their Transition Metal Ions Complexes

Abstract: Two new halogenated azo-Schiff ligands were prepared in two steps. The first step included a condensation between 4-amino acetophenone and 2-fluoro-4-bromo aniline to give the corresponding Schiff base. In the second step, the diazonium salt of this Schiff base reacted with 2-naphthol and 4,5-diphenylimidazole to form two new azo-Schiff base derivatives as ligands; (3-((E)-(4-((E)-1-((4-bromo-2-fluorophenyl) imino)ethyl) phenyl) diazenyl) naphthalen-2-ol (HSBAN) (L1) and ((E)-N-(4-bromo-2-fluorophenyl)-1-(4-((… Show more

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Cited by 11 publications
(11 citation statements)
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“…3, the occurrence of coordination in [Mn(L)Cl(H2O)2], is because of the observed shifting in absorption range of detected transitions at ultra violet region compared to the range of the same transitions in free (HL) to appear at 296 nm, 33783 cm -1 and 322 nm , 31055 cm -1 . Other indication supports the coordination is clear of the d-d transitions in the metal itself, those transitions denoted as 6 A1→ 4 T1(G) at (493 nm, 20283 cm -1 ) and 6 A1→ 4 T2(G) at (703 nm, 14224 cm -1 ) and the magnetic moment (3.71 B.M) can definitely support tetrahedral geometry 21,22 . Figure 4 of [Pd(L)(H2O)Cl] complex shows electronic transitions in ultra violet region resemble those in ligand in its free form with some modifications including shifting and intensity changes because of the coordination with metal ion, those are (π→ π*) and (n→ π*)+(C.T) at 298 nm, 33557 cm -1 and 339 nm, 29498 cm -1 respectively.…”
Section: Uv-vis Studies Of the Ligand (Hl) And Its Complexesmentioning
confidence: 81%
“…3, the occurrence of coordination in [Mn(L)Cl(H2O)2], is because of the observed shifting in absorption range of detected transitions at ultra violet region compared to the range of the same transitions in free (HL) to appear at 296 nm, 33783 cm -1 and 322 nm , 31055 cm -1 . Other indication supports the coordination is clear of the d-d transitions in the metal itself, those transitions denoted as 6 A1→ 4 T1(G) at (493 nm, 20283 cm -1 ) and 6 A1→ 4 T2(G) at (703 nm, 14224 cm -1 ) and the magnetic moment (3.71 B.M) can definitely support tetrahedral geometry 21,22 . Figure 4 of [Pd(L)(H2O)Cl] complex shows electronic transitions in ultra violet region resemble those in ligand in its free form with some modifications including shifting and intensity changes because of the coordination with metal ion, those are (π→ π*) and (n→ π*)+(C.T) at 298 nm, 33557 cm -1 and 339 nm, 29498 cm -1 respectively.…”
Section: Uv-vis Studies Of the Ligand (Hl) And Its Complexesmentioning
confidence: 81%
“…Two absorption bands were observed in the spectrum of copper complex (C2) Figure 11 at [960 nm (10416 cm -1 ) and 739 nm (13531 cm -1 )] which were attributed to[ 2 B1g→ 2 A1g and 2 B1g → 2 B2g] transitions, respectively [20]. The magnetic moment of the copper complex was 2.23 B.M, and these values of Meff agree with Octahedral geometry [22][23][24]. In distilled water, the molar conductance for each synthesized complex was measured using (10 -3 M).…”
Section: The Uv-vis Spectral Studiesmentioning
confidence: 91%
“…Based on the foregoing: Those in charge of building and designing library buildings can benefit from the developments introduced by nanotechnology in the field of construction and building, in order to achieve many benefits that help protect the paper collections of libraries and make them settle in an appropriate environment free from causes of damage and deterioration (by These developments make the library buildings resistant to heat, ultraviolet radiation, humidity, dust and dirt, and direct sunlight, by using glass panels made of nano-materials for the windows of library buildings, which have a great ability to emit light inside the building in a form that is characterized by purity while achieving complete isolation [36][37][38][39][40][41][42][43][44]. Therefore, the paper collections stored in the buildings of these libraries enjoy a good environment with standards and specifications that are able to protect them and keep them for long periods of time used by the beneficiaries [45][46][47][48].…”
Section: Nano Study Of Analytical Reagentsmentioning
confidence: 99%