Cu(II) complexes of monobasic bi- or tridentate (NO, NNO) azo dye ligands: Synthesis, characterization, and interaction with Cu-nanoparticles

Gaber, Mohamed; El-Sayed, Yusif S.; El-Baradie, Kamal Y.; Fahmy, Rowaida M.

doi:10.1016/j.molstruc.2012.07.019

Cited by 38 publications

(18 citation statements)

References 38 publications

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“…These bands have small shifts in the spectra of all complexes suggesting the CN group does not participate in chelation. On the other hand, stretching vibration band of ν (NN) appears at 1413 cm −1 in the spectrum of the ligand . This band shows 51–62 cm –1 shifts in the spectra of complexes indicating the coordination of the nitrogen azo group to the metal ion in chelate formation.…”

Section: Resultsmentioning

confidence: 96%

Synthesis and characterization of azo sulfaguanidine complexes and their application for corrosion inhibition of silicate glass

El-Wakiel

2016

Applied Organom Chemis

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A new azo dye ligand of sulfaguanidine with 5-nitro-8-hydroxyquinoline and its Mn(II), Ni(II), Co(II) and Cu(II) complexes were synthesized and characterized using elemental analysis, inductively coupled plasma, molar conductance, X-ray powder diffraction, thermogravimetric analysis, magnetic moment measurements, and infrared, 1 H NMR, electron impact mass and UV-visible spectral studies. The spectral studies and analytical data revealed that the azo dye ligand acts as a monobasic bidentate ligand via deprotonated OH and nitrogen atom of the azo group. The data support the mononuclear formulation of all complexes, except Cu(II) complex that has a binuclear formulation with a 1:2 metal to ligand ratio. The complexes have tetrahedral structure except Ni(II) which has octahedral geometry. The molar conductance data reveal that all the metal complexes are non-electrolytic in nature The average particle size of the ligand and its Mn(II), Ni(II), Co(II) and Cu(II) complexes is 0.12-0.91 nm. The effect of these compounds for improvement of chemical durability of silicate glass in 0.1 M HCl was studied. Window and soda-lime silica glass were taken as samples for the durability experiments. The inhibition efficiency of the ligand and its complexes for corrosion of glass surfaces after dissolution experiments was evaluated quantitatively using the specific weight loss method and qualitatively using scanning electron microscopy. The inhibition efficiencies of the tested compounds follow the order Co(II) complex > Mn(II) complex > Ni(II) complex > H 3 L > Cu(II) complex. The chemical durability improvement is 88.12-56.25% and 87.99-51.96% for window and soda-lime silica glass, respectively.

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Section: Resultsmentioning

confidence: 96%

Synthesis and characterization of azo sulfaguanidine complexes and their application for corrosion inhibition of silicate glass

El-Wakiel

2016

Applied Organom Chemis

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“…This band appeared nearly at the same position in the complexes spectra, which point out that the azomethine group is not involved in coordination to the metal center. On the other hand, the azo dye band centered at 1494 cm −1 , which is assigned to υ(N═N) , underwent upfield shift in its position by 19–27 cm −1 in the spectra of complexes, suggesting its coordination to the metal center through the nitrogen atom. The phenolic C–O band of the azo dye ligand appeared at 1321 cm −1 .…”

Section: Resultsmentioning

confidence: 99%

Nitroxoline Azo Dye Complexes as Effective Heterogeneous Catalysts for Color Removal and Degradation of Some Organic Textile Dyes

El-Wakiel

El‐Ghamry

2017

Int. J. Chem. Kinet.

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A new azo dye ligand of sulfadiazine with 5‐nitro‐8‐hydroxyquinoline (H2L) and its Cu(II), Mn(II), Co(II), and Ni(II) complexes have been synthesized and characterized using CHN, 1H NMR, EI‐mass, inductive coupled plasma, molar conductance, IR, thermogravimetric analysis, magnetic moment measurements, and UV–vis spectra. On the basis of spectral studies and analytical data, the azo dye acts as a monobasic bidentate ligand coordinating to the metal ions via deprotonated OH and azo nitrogen atom. The spectral data showed that the synthesized complexes have octahedral geometry. The application of the obtained chelates in the oxidative decomposition of three different textile dyes (i.e., AB92, AB40, and AB129) in the presence of H2O2 as an oxidant has been studied. The obtained results indicated that the reactivity of catalysts toward the decolorization of AB40 showed the following order: Cu complex > Ni complex > Co complex > Mn complex; the reactions obey the first‐order reaction mechanism, and the rate constants were determined.

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“…The precipitate was filtered to produce compound I. The crude product was washed with cold water, and this yellow solid was recrystallized out of ethanol to give a white solid [12][13][14] …”

Section: Methodsmentioning

confidence: 99%

Study of the optical properties of poly(vinyl chloride)-4-[(5-mercapto-1,3,4-thiadiazol-2-yl)diazenyl]phenol complexes

Witwit

2014

Eur. J. Chem.

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KEYWORDSThe most widely practiced reaction of diazonium salts is azo coupling. In this process, the diazonium compound is attacked by an electron-rich substrate. When the coupling partners are arenes (phenols), the process is an example of electrophilic aromatic substitution. Poly (vinyl chloride) (PVC) react with 4-[(5-mercapto-1,3,4-thiadiazol-2-yl)diazenyl]phenol (L) in THF to form the PVC-L compound, which have been characterized by spectroscopic methods. PVC-L has further been reacted with different metals ions to form PVC-L-M II complexes. The structure of these complexes has been characterized by FT-IR and UV-Vis spectrophotometry. The optical properties in the region from 200-900 nm were also studied using UV-Vis spectrophotometer. The optical data analyzed and interpreted in term of the theory of phonon assisted direct electronic transitions according to energy gap data the conductivity of PVC and the complexes.

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Cu(II) complexes of monobasic bi- or tridentate (NO, NNO) azo dye ligands: Synthesis, characterization, and interaction with Cu-nanoparticles

Cited by 38 publications

References 38 publications

Synthesis and characterization of azo sulfaguanidine complexes and their application for corrosion inhibition of silicate glass

Synthesis and characterization of azo sulfaguanidine complexes and their application for corrosion inhibition of silicate glass

Nitroxoline Azo Dye Complexes as Effective Heterogeneous Catalysts for Color Removal and Degradation of Some Organic Textile Dyes

Study of the optical properties of poly(vinyl chloride)-4-[(5-mercapto-1,3,4-thiadiazol-2-yl)diazenyl]phenol complexes

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