The IR absorption spectra of the tartrate and citrate complexes of nickel, cobalt, and iron

Tsimbler, S. M.; Shevchenko, L. L.; Григорьева, В. В.

doi:10.1007/bf00607851

Cited by 15 publications

(8 citation statements)

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“…5A), whereas the band at 1758 cm À1 (Fig. 5B) is associated with a metal-coordinated carboxyl group (Tsimbler et al, 1969). During bidentate/tridentate coordination, an increase in the v as COO citrate band at 1635 cm À1 (Fig.…”

Section: In Situ Atr-ftir Analysis Of Reactions At the Mno 2 Interfacementioning

confidence: 93%

Reaction of aqueous Cu–Citrate with MnO2 birnessite: Characterization of Mn dissolution, oxidation products and surface interactions

Jefferson

Liu

et al. 2015

Chemosphere

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Section: In Situ Atr-ftir Analysis Of Reactions At the Mno 2 Interfacementioning

confidence: 93%

Reaction of aqueous Cu–Citrate with MnO2 birnessite: Characterization of Mn dissolution, oxidation products and surface interactions

Jefferson

Liu

et al. 2015

Chemosphere

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“…On the spectra of Co-EDTA and Co-citrate solutions, peaks assigned to COO À ions appeared at 1573-1589 cm À1 and 1404-1407 cm À1 [26][27][28]. Moreover, a shoulder of the peak existed at 1350 cm À1 and was assigned to NO 3 À of the starting material [29].…”

Section: Reduction Of Co Complexes By Nabhmentioning

confidence: 98%

Catalytic hydrolysis of sodium borohydride on Co catalysts

Inokawa

Driss

Trovela

et al. 2016

Int. J. Energy Res.

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Summary The addition of NaBH4 to Co–ethylenediaminetetraacetate (Co–EDTA) and Co–citrate solutions at 25 °C does not lead to generation of hydrogen. However, in the presence of Co‐based catalysts synthesized via chemical reduction of Co–EDTA and Co–citrate complexes with NaBH4 at elevated temperature, an intensive generation of H2 took place. In this study, the reduction mechanism of both complexes was elucidated by using various techniques. From the results of attenuated total reflection and mass spectrometry analysis, it was suggested that NaBH4 was oxidized to NaBO2 and that organic ligands of Co complexes were decomposed to gaseous hydrocarbons, such as C2H4, C3H4, and/or C2H3N. Structural characterizations of X‐ray diffraction, scanning transmission electron microscopy, transmission electron microscope, energy‐dispersive spectroscopy, and X‐ray photoelectron spectra on the catalysts revealed that Co(OH)2, metallic cobalt, and cobalt borate were obtained in both cases. The morphology of Co(OH)2 and the dispersion of metallic cobalt and cobalt borate nanoparticles were significantly different. In the case of the catalyst prepared from Co–EDTA, the nanoparticles of Co species aggregated with diameters from 100 to several hundred nanometers on Co(OH)2 slabs. On the catalyst prepared from Co–citrate, the Co(OH)2 formed sheets, and the nanoparticles of Co species formed clusters of 5–10 nm in diameter, which are dispersed well on the Co(OH)2 sheet. The catalyst obtained from Co–citrate showed higher catalytic activity on hydrolysis reaction of NaBH4 than that from Co–EDTA. Copyright © 2016 John Wiley & Sons, Ltd.

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“…The presence of Fe(II)C is confirmed comparing the hybrid spectra with those of the pure Fe(II)C. When the different amounts of Fe(II)C are added in the SiO 2 /PEG/Fe(II)C some bands related to citrate are detectable with several intensity. In particular, the peaks at 1734 and 1430 cm −1 due to the C=O stretching and COO − group, respectively, are visible as shoulder in the hybrid spectra (curve b–d) compared to pure Fe(II)C spectra (curve f) [27,28].…”

Section: Resultsmentioning

confidence: 99%

Drug Release of Hybrid Materials Containing Fe(II)Citrate Synthesized by Sol-Gel Technique

et al. 2018

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The use of oral iron integration is commonly recommended for the treatment of iron deficiency, nevertheless the diagnosis and treatment of this disease could clearly be improved. The aim of this work was the synthesis of therapeutic systems, iron (II) based, by sol-gel method. In an SiO2 matrix, we embedded different weight percentages of polyethylene glycol (PEG6, 12, 24 wt%) and ferrous citrate (Fe(II)C5, 10, 15 wt%) for drug delivery applications. Fourier Transform Infrared (FTIR) spectroscopy was used to study the interactions among different components in the hybrid materials. Release kinetics in a simulated body fluid (SBF) were investigated and the amount of Fe2+ released was detected by Ultraviolet–Visible spectroscopy (UV-VIS) after reaction with ortho-phenantroline. Furthermore, the biological characterization was carried out. The bioactivity of the synthesized hybrid materials was evaluated by the formation of a layer of hydroxyapatite on the surface of samples soaked in SBF using FTIR spectroscopy. Finally, also, the potential antibacterial properties of the different materials against two different bacteria, E. coli and P. aeruginosa, were investigated.

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The IR absorption spectra of the tartrate and citrate complexes of nickel, cobalt, and iron

Cited by 15 publications

References 1 publication

Reaction of aqueous Cu–Citrate with MnO2 birnessite: Characterization of Mn dissolution, oxidation products and surface interactions

Reaction of aqueous Cu–Citrate with MnO2 birnessite: Characterization of Mn dissolution, oxidation products and surface interactions

Catalytic hydrolysis of sodium borohydride on Co catalysts

Drug Release of Hybrid Materials Containing Fe(II)Citrate Synthesized by Sol-Gel Technique

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