Cobalt(II) and copper(II) complexes with carboxylic acids, imidazole, and 2-methylimidazole

Скорик, Н. А.; Filippova, M. M.; Bukhol’tseva, E. I.; Malkov, Victor S.; Курзина, И. А.

doi:10.1134/s0036023615060157

Cited by 10 publications

(5 citation statements)

References 4 publications

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“…The results of [18,19] and the present research (Table 8) show that the attachment of one molecule of imidazole to the copper ion increases the stability constant logarithm of the complex ion by approximately 3.5-4 units. The authors in [31] estimate the compatibility of different ligands (L, A) in the inner sphere of the complex with a 1:1:1 composition by using the value of the k S co-proportioning constant, which is related to the common stability constants of the complexes by the ratio of lgk S = lgβ(MLA) − 1 2 (lgβ(ML 2 ) + lgβ(MA 2 )).…”

Section: Determination Of Composition and Stabilitysupporting

confidence: 58%

“…When the ligands are compatible, k S > 1, and the MLC stability constant is greater than the arithmetic mean among the stability constants of the monoligand complexes. The ligands can be shown to be compatible in the CuHImTar complex since lgk S = 7.49 − (0.5 • 7.57 + 0.5 • 5.11) = 1.15 and k S > 1 (lgβ(Cu(HIm) 2 ) = 7.57 [18], lgβ(CuTar 2 ) = 5.11 [30]), and lgβ(CuHImTar) > 1 2 (lgβ(Cu(HIm) 2 ) + lgβ(CuTar 2 )), 7.49 > 6.34. Figure 7 shows that the mixed-ligand CuHImTar particles turn out to be the dominant forms in a wide pH range (curve 4).…”

Section: Determination Of Composition and Stabilitymentioning

confidence: 99%

“…Both the production of solid mixed-ligand salts (MLSs) and the simultaneous study of mixed-ligand complexes (MLCs) in a solution based on nitrogen and oxygen ligands are of particular interest [17][18][19][20][21][22][23]. Therefore, the purpose of this study was to develop a method for synthesizing the mixed-ligand compounds of copper(II) with tartaric and salicylic acid anions and azoles using previously synthesized slightly soluble tartrate and salicylate of copper(II).…”

Section: Introductionmentioning

confidence: 99%

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Interaction of Copper(II) Ions with Certain Oxyacids and Azoles

Skorik,

Tomilova,

Pastushchak

et al. 2023

Inorganics

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Compounds composed of [[Cu(HIm, metIm)2‒3L] ∙ nH2O (n = 0, 2) were obtained during the interaction of slightly soluble tartrate and copper(II) salicylate composed of CuL ∙ nH2O (n = 1–2, L2−—Tar2−, Sal2−) with imidazole (HIm) and 2-methylimidazole (metIm). Mono- and bi-ligand salts were analyzed; the process of their thermal decomposition was studied. The solubility constants KS of the CuC4H4O6 ∙ 2H2O tartrate and CuC7H4O3 ∙ H2O salicylate of copper(II) with at ionic strength of 0.3 were determined. The IR spectroscopy method showed the participation in complexation of the nitrogen atom N(3) of imidazole and the oxygen atoms of the carboxyl groups of oxyacids, as well as the hydroxyl group of salicylic acid in the mixed-ligand salts of copper(II). The compositions and stability of the imidazole-tartrate(salicylate) copper(II) complexes in an aqueous solution were determined by performing photometry and spectrophotometry and of the monoligand complexes [CuTar] and [CuSal] were determined by solubility and isomolar series methods.

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Section: Determination Of Composition and Stabilitysupporting

confidence: 58%

Section: Determination Of Composition and Stabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Interaction of Copper(II) Ions with Certain Oxyacids and Azoles

Skorik,

Tomilova,

Pastushchak

et al. 2023

Inorganics

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“…β-cyclodextrin works as both a reducing and stabilizing agent 53 , 62 – 64 , while fumaric works as a complexing and capping agent 65 . At initial stages of reaction, Cu 2+ , Co 2+ , and Co 3+ ions form complexes with β-CD and FA 66 . The initially introduced Co 2+ in the reaction mix is easily oxidized to Co 3+ specially in presence of strong ligating agents under air atmosphere 67 .…”

Section: Resultsmentioning

confidence: 99%

Novel mixed heterovalent (Mo/Co)Ox-zerovalent Cu system as bi-functional electrocatalyst for overall water splitting

Tartour,

Sanad,

El-Hallag

et al. 2024

Sci Rep

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A novel hybrid ternary metallic electrocatalyst of amorphous Mo/Co oxides and crystallized Cu metal was deposited over Ni foam using a one-pot, simple, and scalable solvothermal technique. The chemical structure of the prepared ternary electrocatalyst was systematically characterized and confirmed via XRD, FTIR, EDS, and XPS analysis techniques. FESEM images of (Mo/Co)Ox–Cu@NF display the formation of 3D hierarchical structure with a particle size range of 3–5 µm. The developed (Mo/Co)Ox–Cu@NF ternary electrocatalyst exhibits the maximum activity with 188 mV and 410 mV overpotentials at 50 mA cm−2 for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. Electrochemical impedance spectroscopy (EIS) results for the (Mo/Co)Ox–Cu@NF sample demonstrate the minimum charge transfer resistance (Rct) and maximum constant phase element (CPE) values. A two-electrode cell based on the ternary electrocatalyst just needs a voltage of about 1.86 V at 50 mA cm−2 for overall water splitting (OWS). The electrocatalyst shows satisfactory durability during the OWS for 24 h at 10 mA cm−2 with an increase of only 33 mV in the cell potential.

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“…The stock solution was centrifuged for 15 min at 7 g to remove the remaining hemin crystal. The concentration was 58,400 mM in 0.1 M NaOH based on the absorption at 385 nm [26]. A double-beam spectrophotometer was used to capture all absorption spectra.…”

Section: Beta-hematin Formationmentioning

confidence: 99%

A New Synthesis of Copper Nanoparticles and Its Application as a Beta-Hematin Inhibitor

Al-Refaia,

Alrikabi,

Alkarimi

et al. 2024

Indones. J. Chem.

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To prevent the development of drug resistance and unwanted side effects, nanomaterials have been studied for their potential to inhibit beta-hematin, an important protein for the survival of malaria parasites. The use of nanomaterials as a medication against parasites and mosquito vectors has recently shown promising drug therapeutic strategies. One of the newest areas of interest in nanotechnology and nanoscience is the environmentally friendly production of nanoparticles. Green synthesis to produce metal nanoparticles is the most important strategy to overcome the possible dangers of toxic chemicals for a safe and harmless environment. For this study, copper nanoparticles (CuNPs) were synthesized using Iraqi basil leaf extract, demonstrating its novelty in nanosciences. The formation of CuNPs can be seen visually as a color shift from green to brownish. UV-vis absorption spectra, Fourier transform infrared (FTIR), X-ray diffraction (XRD), energy dispersive X-ray (EDX), and scanning electron microscopy (SEM) were used to characterize the synthesized nanoparticles. The surface plasmon resonance property (SPR) of CuNPs is revealed by UV-vis analysis, which shows a distinctive absorption peak at 420–430 nm, whereas SEM reveals the spherical shape of CuNPs with sizes ranging from 30 to 50 nm.

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Cobalt(II) and copper(II) complexes with carboxylic acids, imidazole, and 2-methylimidazole

Cited by 10 publications

References 4 publications

Interaction of Copper(II) Ions with Certain Oxyacids and Azoles

Interaction of Copper(II) Ions with Certain Oxyacids and Azoles

Novel mixed heterovalent (Mo/Co)Ox-zerovalent Cu system as bi-functional electrocatalyst for overall water splitting

A New Synthesis of Copper Nanoparticles and Its Application as a Beta-Hematin Inhibitor

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