Experimental and theoretical substantiation of differences of geometric isomers of copper(II) α-amino acid chelates in ATR-FTIR spectra

Berestova, T. V.; Хурсан, С. Л.; Мустафин, А. Г.

doi:10.1016/j.saa.2019.117950

Cited by 15 publications

(13 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In current findings, the FTIR spectra of CuO, NiO and its hybrid are shown in Figure 2 (IRAffinity-1S). The different absorption bands were observed at 1599, 1408, 1081, 565 for CuO-NPs [50]. The absorption band at 1599 cm −1 is due to the in-plane CH bending vibration from the phenyl rings while 1408, 1081 and 565 cm −1 represent the presence of CH3, ref.…”

Section: Fourier Transform Infrared Spectrometer (Ftir)mentioning

confidence: 96%

Curcuma longa Mediated Synthesis of Copper Oxide, Nickel Oxide and Cu-Ni Bimetallic Hybrid Nanoparticles: Characterization and Evaluation for Antimicrobial, Anti-Parasitic and Cytotoxic Potentials

et al. 2021

View full text Add to dashboard Cite

Nanoparticles have long been known and their biomedical potent activities have proven that these can provide an alternative to other drugs. In the current study, copper oxide, nickel oxide and copper/nickel hybrid NPs were biosynthesized by using Curcuma longa root extracts as a reducing and capping agent, followed by characterization via UV-spectroscopy, Fourier transformed infrared spectroscopy (FTIR), energy dispersive X-ray (EDX), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermo galvanometric analysis (TGA), and band gap. FTIR spectroscopy shows the availability of various functional groups and biomolecules such as carbohydrate, protein, polysaccharides, etc. The EDX peak confirmed that the elemental nickel and copper were present in large quantity in the analyzed sample. Scanning electron micrographs showed that the synthesized CuO-NPs and NiO-NPs were polyhedral uniform and homogeneous in morphology, while the copper/nickel hybrid NPs were well dispersed, spherical in shape, and uniform in size. TEM micrographs of CuO-NPs had 27.72 nm, NiO had 23.13 nm and, for their hybrid, the size was 17.38 nm, which was confirmed respectively. The CuO and NiO NPs possessed spherical- to multi-headed shapes, while their hybrid showed a complete spherical shape, small size, and polydispersed NPs. The XRD spectra revealed that the average particle size for CuO, NiO, and hybrid were 29.7 nm, 28 nm and 27 nm, respectively. Maximum anti-diabetic inhibition of (52.35 ± 0.76: CuO-NPs, 68.1 ± 0.93: NiO-NPs and 74.23 ± 0.42: Cu + Ni hybrids) for α-amylase and (39.25 ± 0.18 CuO-NPs, 52.35 ± 1.32: NiO-NPs and 62.32 ± 0.48: Cu + Ni hybrids) for α-glucosidase were calculated, respectively, at 400 µg/mL. The maximum antioxidants capacity was observed as 65.1 ± 0.83 μgAAE/mg for Cu-Ni hybrids, 58.39 ± 0.62 μgAAE/mg for NiO-NPs, and 52.2 ± 0.31 μgAAE/mg for CuO-NPs, respectively, at 400 μg/mL. The highest antibacterial activity of biosynthesized NPs was observed against P. aeuroginosa (28 ± 1.22) and P. vulgaris (25 ± 1.73) for Cu + Ni hybrids, respectively. Furthermore, the antibiotics were coated with NPs, and activity was noted. Significant anti-leishmanial activity of 60.5 ± 0.53 and 68.4 ± 0.59 for Cu + Ni hybrids; 53.2 ± 0.48 and 61.2 ± 0.44 for NiO-NPs; 49.1 ± 0.39 and 56.2 ± 0.45 for CuO-NPs at 400 μg/mL were recorded for promastigote and amastigotes, respectively. The biosynthesized NPs also showed significant anti-cancerous potential against HepG2 cell lines. It was concluded from the study that NPs are potential agents to be used as an alternative to antimicrobial agents.

show abstract

Section: Fourier Transform Infrared Spectrometer (Ftir)mentioning

confidence: 96%

Curcuma longa Mediated Synthesis of Copper Oxide, Nickel Oxide and Cu-Ni Bimetallic Hybrid Nanoparticles: Characterization and Evaluation for Antimicrobial, Anti-Parasitic and Cytotoxic Potentials

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The band around 1500 cm –1 can be assigned to C–O axial deformation . Note that it is shifted to ∼1627 cm –1 , which may confirm the formation of a copper complex, as the positions of CO and NH 2 may overlap . The band at 1119.7 cm –1 confirms the formation of the C–B bond, while both bands at 1050 and 1250 cm –1 are attributed to C–N stretching. , To further confirm the formation of BCN nanosheets, Raman measurements were conducted, see Figure b.…”

Section: Resultsmentioning

confidence: 99%

Intermolecular Electron Transfer in Electrochemically Exfoliated BCN-Cu Nanosheet Electrocatalysts for Efficient Hydrogen Evolution

Hasan

Khedr

Zakaria

et al. 2022

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

The search for materials with superior electrocatalytic performance has attracted attention during the past few years aiming to identify a convenient material that works at a low overpotential with long-term stability. Herein, we introduce an innovative technique to fabricate two-dimensional BCN heterostructure nanosheets with various Cu:BCN weight ratios. The fabricated composites showed unique electrocatalytic properties for hydrogen evolution reaction (HER). The morphology and structure of the electrocatalysts were characterized using field emission scanning electron microscopy, Raman, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy techniques. Remarkably, this study reveals the effect of electrochemical chronopotentiometry on facilitating the electrochemical exfoliation and hence enhancing the catalytic activity of the fabricated nanosheets. This effect was further confirmed via density functional theory (DFT) calculations, unveiling the effect of the formed oxide layer on the charge transfer process. The overpotential of the 0.125 Cu-BCN composite at a current density of -10 mA/cm 2 vs RHE is 50% lower than that of pristine BCN. These findings were also affirmed by the DFT calculations, which showed that incorporating copper on BCN has significantly reduced the G H* value of the HER and subsequently accelerates the kinetics of the reaction and the overall catalytic activity of the material.

show abstract

“…] and mixedligand [Cu(L-Phe)(Gly)] chelate complexes were obtained by the interaction of solutions of a metal salt with L-phenylalanine (L-Phe) in a ratio of 1 : 2; with L-phenylalanine and glycine (Gly) in a 1 : 1 : 1 ratio, based on the procedures [28]. The [Co(L-Phe) 3 ] complex was obtained on the basis of the procedure [29].…”

Section: Articlesmentioning

confidence: 99%

Enantioselective Voltammetric Sensors Based on Amino Acid Complexes of Cu(II), Co(III), and Zn(II)

et al. 2021

View full text Add to dashboard Cite

The electrochemical and analytical characteristics of enantioselective sensors based on glassy carbon electrodes modified by chelate complexes (bis(L-phenylalaninate) copper(II), glycinato-L-phenylalaninate copper(II), tris(L-phenylalaninate) cobalt(II), bis(L-phenylalaninate) zinc) are studied. It is found that the most promising sensor for determining tryptophan enantiomers is the sensor modified by copper(II) (bis)L-phenylalaninate. In determining tryptophan enantiomers, this sensor provides a linear concentration range from 6.25 × 10 -7 to 0.5 × 10 -3 M for L-tryptophan and from 5 × 10 -6 to 0.5 × 10 -3 M for D-tryptophan. The sensor is more sensitive to L-tryptophan. The proposed sensor was used for the recognition and determination of tryptophan enantiomers in human urine and plasma samples, and also in a mixture of enantiomers. The statistical assessment of the results of determinations by the spiked-found method indicates the absence of a significant systematic error.

show abstract

Experimental and theoretical substantiation of differences of geometric isomers of copper(II) α-amino acid chelates in ATR-FTIR spectra

Cited by 15 publications

References 56 publications

Curcuma longa Mediated Synthesis of Copper Oxide, Nickel Oxide and Cu-Ni Bimetallic Hybrid Nanoparticles: Characterization and Evaluation for Antimicrobial, Anti-Parasitic and Cytotoxic Potentials

Curcuma longa Mediated Synthesis of Copper Oxide, Nickel Oxide and Cu-Ni Bimetallic Hybrid Nanoparticles: Characterization and Evaluation for Antimicrobial, Anti-Parasitic and Cytotoxic Potentials

Intermolecular Electron Transfer in Electrochemically Exfoliated BCN-Cu Nanosheet Electrocatalysts for Efficient Hydrogen Evolution

Enantioselective Voltammetric Sensors Based on Amino Acid Complexes of Cu(II), Co(III), and Zn(II)

Contact Info

Product

Resources

About