Utilization of IR spectral detailed analysis for coordination mode determination in novel Zn–cyclen–aminoacid complexes

Vargová, Zuzana; Almáši, Miroslav; Arabuli, Lili; Györyová, K.; Zeleňák, Vladimı́r; Kuchár, Juraj

doi:10.1016/j.saa.2010.12.022

Cited by 14 publications

(4 citation statements)

References 46 publications

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“…Valgova et al attributed the blue shift of the COO À stretching IR absorption band to the connection of the carboxylate anion to the coordination surroundings of the metallic ion, i.e., entrance into the ligand field of the central metallic ion. 27 Although the metallic species they studied was Zn, similarity to the present study in this respect is clear. adsorbed onto TiO 2 (011) to be a bidentate bridging.…”

Section: Discussionsupporting

confidence: 73%

“…Surface chemical interactions by attrition milling and subsequent annealing Vargova et al studied glycine-metal complex formation in detail by means of infrared spectroscopy. 27 The disappearance of the absorption bands below 800 cm À1 , i.e., those due to PVdF, e.g., of COO À scissoring, 27 implies partial decomposition of PVdF during attrition milling. We also observed the blue shift of the absorption peaks for the absorption bands between 1300 and 1500 cm À1 , as shown in Fig.…”

Section: Discussionmentioning

confidence: 99%

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Modification of titania nanoparticles for photocatalytic antibacterial activity via a colloidal route with glycine and subsequent annealing

et al. 2012

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Changes in the colloid-chemical and photocatalytic properties of titania nanoparticles by attrition milling in the presence of glycine (Gly) and subsequent heat treatment were examined. By milling at 1500 rpm for 6 h, the average particle size was decreased from 123 to 85 nm, with simultaneous decrease in the specific surface area from 35.1 to 23.5 m 2 /g. Interfacial reactions between titania and Gly were confirmed by Fourier transform infrared spectroscopy, from the blue shift of the COO À related vibrational bands by 25 cm À1, relative to the same band from the pristine Gly. The bimodal N1s x-ray photoelectron spectroscopy peak similar to that from the reported titania-amino acid complex is another indication of the complex formation with the participation of nitrogen. When the dispersion was dried and calcined at 500°C in air, the powder exhibited pale yellow color. Diffuse reflectance spectroscopy showed significant visible light absorption, suggesting nitrogen incorporation into titania. The fired product showed high photocatalytic antibacterial activity by irradiation of blue light centered at around 440 nm, using Escherichia coli as a specimen of bacterial species. Thus, the present Gly-modified titania nanoparticles could be used for eliminating indoor bacteria under soft blue illumination. The series of interfacial chemical processes involved are also discussed.

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Section: Discussionsupporting

confidence: 73%

Section: Discussionmentioning

confidence: 99%

Modification of titania nanoparticles for photocatalytic antibacterial activity via a colloidal route with glycine and subsequent annealing

et al. 2012

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“…The disappearance of the strong absorption at 1680 cm −2 corresponding to C = O asymmetric stretching suggests that undissociated monomers are not present in the whitish layer. In addition, the two strong absorption peaks located at 1554 cm −1 and 1396 cm −1 correspond to asymmetric and symmetric COO − stretching, respectively . According to the literature, the previously cited peaks fall within the range of the asymmetric stretching modes of CO 3 2− devoted to zinc carbonate (ZnCO 3 ), which are commonly observed at 1500 ÷ 1552 cm −1 and 1380 ÷ 1385 cm −1 , respectively .…”

Section: Resultsmentioning

confidence: 83%

Sebacic acid as corrosion inhibitor for hot‐dip galvanized (HDG) steel in 0.1 M NaCl

Fedel

Poelman

Olivier

et al. 2019

Surface & Interface Analysis

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The potential of sebacic acid as a corrosion inhibitor for hot-dip galvanized steel in 0.1 M NaCl solution has been investigated. Different concentrations of the organic acid have been tested in order to understand the inhibition mechanism of the compound. The electrochemical test revealed a competitive mechanism between the dissolution of the metal in the acidified solution and the inhibition provided by the dicarboxylic species. The formation of a whitish layer consisting of zinc carboxylates and corrosion products was proved by means of scanning electron microscopy (SEM) investigation combined with Fourier transform infrared (FT-IR) analysis. A bidentate bridging coordination between the Zn(II) and the carboxylic species is suggested.

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“…Some of the strong bands, such as stretching vibrations of C=O groups (1720 cm −1 ) of the grafted fibers, were broadened and split into two bands at 1735 cm −1 and ~1700 cm −1 , which may correspond to the C=O groups of ground PAN and Ag + -chelated grafted fibers, respectively [ 44 ]. The coordination of metal ions such as Ag + and Zn +2 to the carboxyl groups was indicated by the remarkable shifts of the relevant bands in the literature [ 44 , 45 ]. Therefore, it can be concluded that the PAN- g -(AA/IA) and PAN- g -(AA/AAm), showing shifts at relatively the highest intensity, were responsible for the high adsorption of Ag + ions to the fibers.…”

Section: Resultsmentioning

confidence: 99%

Investigation of antibacterial properties of polyacrylonitrile fibers modified by new functional groups and silver nanoparticles

OKAY¹,

Erdoğan²,

KARACA³

et al. 2022

Turkish Journal of Chemistry

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This work reports the surface modification of polyacrylonitrile (PAN) fibers by graft copolymerization to ensure the decoration of homogenous and dense Ag nanoparticles. Two facile and subsequent modification processes resulted in a PAN fiber composite with an intact fibrous structure, sufficiently conductive for antistatic application and antibacterial activity. In the first step, some chemically attractive monomers and monomer mixtures, such as acrylic acid (AA), AA-itaconic acid (AA-IA), AA-acrylamide (AA-AAm), were introduced to the fiber surface by grafting. The grafting process was evidenced by FTIR, 1 H-NMR, and SEM techniques. The second step aimed to form a chelate structure by Ag + ions with the coordination centers imparted to the PAN structure, and then, Ag nanoparticles (AgNPs) were decorated on the copolymer fiber surfaces by reducing with the NaBH 4 . The presence, distribution, and changes that occurred after the AgNPs decoration were also monitored by the SEM technique. It was obtained that the AgNPs could not be easily removed from the composites, which presented an appearance as if they were dyed with Ag. It was determined that the composite fibers gained a certain degree of conductivity with the surface resistivity value of 10 9 –10 2 Ω/cm 2 . The antibacterial activity of the composites against E. coli and S. aureus was examined by the zone of inhibition test compared to their detergent-washed samples.

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Utilization of IR spectral detailed analysis for coordination mode determination in novel Zn–cyclen–aminoacid complexes

Cited by 14 publications

References 46 publications

Modification of titania nanoparticles for photocatalytic antibacterial activity via a colloidal route with glycine and subsequent annealing

Modification of titania nanoparticles for photocatalytic antibacterial activity via a colloidal route with glycine and subsequent annealing

Sebacic acid as corrosion inhibitor for hot‐dip galvanized (HDG) steel in 0.1 M NaCl

Investigation of antibacterial properties of polyacrylonitrile fibers modified by new functional groups and silver nanoparticles

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