Voltammetric analysis of Cu (II), Cd (II) and Zn (II) complexes and their cyclic voltammetry with several cephalosporin antibiotics

El‐Maali, Nagwa Abo; Osman, Ahmed H.; Aly, Aref A. M.; Al‐Hazmi, Gamil A.A.

doi:10.1016/j.bioelechem.2004.09.002

Cited by 67 publications

(25 citation statements)

References 20 publications

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“…2). In the case of free Zn 2+ ions there was only one reduction peak at about −1.4 V related to the reduction of Zn II to Zn 0 [16]. In order to evaluate the origin of the two reduction peaks of 1, the ratio of currents of the metal-centered and ligand-centered peaks were measured as about 1:1 and 1:2 for the first and second Diagram 1.…”

Section: Electrochemical Studiesmentioning

confidence: 99%

Syntheses, structures and properties of a new compound of the type [Zn(4,4′-dmo-2,2′-bpy)2(CH3COO)]2[Zn(SCN)4]·H2O with zinc in two cationic and one anionic complexes

Shirdel

Marandi

Jalilzadeh

et al. 2015

MGC

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A new compound of zinc(II) with the ligand 4,4 -dimethoxy-2,2 -bipyridine(4,4 -dmo-2,2 -bpy), [Zn(4,2bpy) has been obtained as white single crystals by the branched tube method and characterized by elemental analysis, IR and 1 H NMR spectroscopy and by X-ray crystallography. Thermal and electrochemical properties were also studied. The crystal structure consits of two discrete [Zn(4,4 -dmo-2,2 -bpy) 2 (CH 3 COO)] + cations and a [Zn(SCN) 4 ] 2− anion. Zinc(II) cations in the [Zn(4,4 -dmo-2,2 -bpy) 2 (CH 3 COO)] + units have a distorted octahedral surrounding by ZnN 4 O 2 coordinated through four N atoms of 4,4 -dmo-2,2 -bpy and two O atoms of acetate. Zinc(II) in [Zn(SCN) 4 ] 2− has a distorted tetrahedral coordination environment with an ZnN 4 ligated by four N atoms of the terminal thiocyanates. In the solid state, [Zn(4,4 -dmo-2,2 -bpy)(CH 3 COO)] + cations are interconnected by tetrahedral [Zn(NCS) 4 ] 2− units by cooperative C-H•••O, C-H•••S, C-H•••N and π-π stacking interactions resulting in a 2D network structure. Establishment of such networks seems to be aiding the crystallization.

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Section: Electrochemical Studiesmentioning

confidence: 99%

Syntheses, structures and properties of a new compound of the type [Zn(4,4′-dmo-2,2′-bpy)2(CH3COO)]2[Zn(SCN)4]·H2O with zinc in two cationic and one anionic complexes

Shirdel

Marandi

Jalilzadeh

et al. 2015

MGC

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“…The dominant species of copper is Cu 2+ below pH 6 [49]. When pH is 2.5 the percent removal of CEX is higher than in the pH range from 2.5 to 6.5, which can be explained in that CEX forms complexes with Cu(II) [50]. For AC-Fe, the maximum adsorption of CEX was obtained at pH 4.5-6.5.…”

Section: Effect Of Initial Phmentioning

confidence: 92%

Removal of cephalexin from aqueous solutions by original and Cu(II)/Fe(III) impregnated activated carbons developed from lotus stalks Kinetics and equilibrium studies

Liu

Zhang

et al. 2011

Journal of Hazardous Materials

167

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“…The absorbance was measured at 350nm against the reagent blank. A graph is drawn between the volume of CFX and absorbance 26 . The data are shown in Table 8 and Fig 8. The point of the intersections in graph gives the composition of these complexes [27][28] .…”

Section: Mole Ratio Methodsmentioning

confidence: 99%

“…Graph is plotted (Figures 3 & 4) between pH and absorbance values are given in Table.2. The intensity of the color increases with time, but the maximum color develop is possible 13 only after heating the system for half an hour at 50 to 60°C. In explaining the results on CFX-Cd (II) and CFX-Cu (II) complexes 14 -15 , the author has proved that hydrolysis of the drug are not required for complex formation.…”

Section: Effect Of Phmentioning

confidence: 99%

Spectrophotometric Determination Studies of Cefotaxime (CFX) and their CFX- Cd (II) and CFX- Cu (II) Complexes

Kondaiah¹,

Chowdary²,

Reddy³

et al. 2017

Orient. J. Chem

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In this work Cefotoxime (CFX) and its Cd (II) and Cu (II) metal complexes determination were carried out by spectrophotometric method. The following experimental procedures like effect of pH, effect of metal ion concentration, effect of drug concentration, effect of time, effect of organic solvents and the composition of the complex by mole ratio and job's continuous variation method and interference studies were carried out for the determination of metal ions and drug. In this research work, it is clear that Cd forms a stable 1:1 colored complex with CFX in basic medium and Cu forms stable 1:1 colored complex with CFX in acidic medium. Effect of pH was studied for CFX-Cd (II) and CFX-Cu (II) complexes; it is noticed from that at pH 11 CFX-Cd (II) and at pH 5.5 CFX-Cu (II) colored complexes were formed. In these reactions can be found the metal ions in the range 1.12 to 6.74 and 3.812 to 8.895 µg/ml and the drug in the range 0.02 to 0.14 mg/ml respectively for CFX-Cu (II) and CFX-Cu (II) complexes. Effect of time clearly suggest , that the maximum absorbance is obtained only after heating the mixture to 40 o & 60°C respectively for CFX-Cd (II) and CFX-Cu (II) complexes. It has been observed that the absorbance values remain constant thereafter; it indicates the formation of 1:1 stable metal complexes.

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Voltammetric analysis of Cu (II), Cd (II) and Zn (II) complexes and their cyclic voltammetry with several cephalosporin antibiotics

Cited by 67 publications

References 20 publications

Syntheses, structures and properties of a new compound of the type [Zn(4,4′-dmo-2,2′-bpy)2(CH3COO)]2[Zn(SCN)4]·H2O with zinc in two cationic and one anionic complexes

Syntheses, structures and properties of a new compound of the type [Zn(4,4′-dmo-2,2′-bpy)2(CH3COO)]2[Zn(SCN)4]·H2O with zinc in two cationic and one anionic complexes

Removal of cephalexin from aqueous solutions by original and Cu(II)/Fe(III) impregnated activated carbons developed from lotus stalks Kinetics and equilibrium studies

Spectrophotometric Determination Studies of Cefotaxime (CFX) and their CFX- Cd (II) and CFX- Cu (II) Complexes

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