Vibrational Spectra of γ-Aminobutyric Acid

Suresh, D.M.; Sajan, D.; Laladas, K. P.; Joe, I. Hubert; Jayakumar, V. S.

doi:10.1063/1.3046239

Cited by 11 publications

(3 citation statements)

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“…Unfortunately, this band overlapped with the N-H band of the PEI. However, the bending signals in the wagging and twisting mode of the C-O bond can be observed [ 42 , 43 , 44 , 45 ].…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Copper Nanoparticles Stabilized with Organic Ligands and Their Antimicrobial Properties

Jardón-Maximino¹,

Pérez-Álvarez²,

Cadenas‐Pliego³

et al. 2021

Polymers

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In this work, we report the synthesis of copper nanoparticles (Cu NPs), employing the chemical reduction method in an aqueous medium. We used copper sulfate pentahydrate (CuSO4·5H2O) as a metallic precursor; polyethylenimine (PEI), allylamine (AAM), and 4-aminobutyric acid (AABT) as stabilizing agents; and hydrated hydrazine as a reducing agent. The characterization of the obtained nanoparticles consisted of X-ray, TEM, FTIR, and TGA analyses. Through these techniques, it was possible to detect the presence of the used stabilizing agents on the surface of the NPs. Finally, a zeta potential analysis was performed to differentiate the stability of the nanoparticles with a different type of stabilizing agent, from which it was determined that the most stable nanoparticles were the Cu NPs synthesized in the presence of the PEI/AAM mixture. The antimicrobial activity of Cu/PEI/AABT toward P. aeruginosa and S. aureus bacteria was high, inhibiting both bacteria with low contact times and copper concentrations of 50–200 ppm. The synthesis method allowed us to obtain Cu NPs free of oxides, stable to oxidation, and with high yields. The newly functionalized Cu NPs are potential candidates for antimicrobial applications.

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“…Unfortunately, this band overlapped with the N-H band of the PEI. However, the bending signals in the wagging and twisting mode of the C-O bond can be observed [ 42 , 43 , 44 , 45 ].…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Copper Nanoparticles Stabilized with Organic Ligands and Their Antimicrobial Properties

Jardón-Maximino¹,

Pérez-Álvarez²,

Cadenas‐Pliego³

et al. 2021

Polymers

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“…3a) at 1694 (C]O stretching in carboxylic acid) and 1042 cm À1 (C-N, aliphatic amine), indicated that radical attacks could open the pyrrolidone rings to form poly(vinyl aminobutyric acid) units. 46,47 Fading of the signal (Fig. 3b) at 2874 cm À1 (-CH 2 symmetric stretching, chain) 45 suggested radical abstractions of hydrogen atoms from the polymer chains generating macroradicals.…”

Section: àmentioning

confidence: 99%

Irreversible photo-Fenton-like triggered agglomeration of ultra-small gold nanoparticles capped with crosslinkable materials

et al. 2019

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“…In view of these assertions, in this work, CNT was functionalized with γ-aminobutyric acid (GABA), which has a molecular structure similar to that of hydroxybutyrate, the main monomer on PHBV chain. GABA is a four-carbon nonprotein amino acid which is involved in the transmissions in the mammalian central nervous system [19,20].…”

Section: Introductionmentioning

confidence: 99%

Covalently γ-aminobutyric acid-functionalized carbon nanotubes: improved compatibility with PHBV matrix

et al. 2019

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The improvement of compatibility between carbon nanotubes (CNTs) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was achieved using CNT functionalized with γ-aminobutyric acid (GABA). The efficiency of the CNT functionalization with GABA was evaluated by X-ray photoelectron spectroscopy (XPS), infrared spectroscopy (FT-IR), Raman spectroscopy, and transmission electron microscopy (TEM). The PHBV/CNT nanocomposites were produced in the molten state with the addition of 0.5 wt% of CNT (pristine, oxidized and functionalized with GABA) and characterized concerning the Izod impact strength tests. The impact fracture morphologies were analyzed using scanning electron microscopy. The results showed that GABA was covalently attached to CNT, resulting in the detection of nitrogen in the XPS survey, the shift of carbonyl peak wavelength on FT-IR, and a higher degree of structural disorder, detected by Raman and observed in TEM images. The impact strength was not significantly affected by the introduction of CNT; however, the impact fracture mechanism was changed from fragile to ductile when CNT was functionalized with GABA. These results are promising for the production of environmentally friendly nanocomposites with superior properties.

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Vibrational Spectra of γ-Aminobutyric Acid

Cited by 11 publications

References 0 publications

Synthesis of Copper Nanoparticles Stabilized with Organic Ligands and Their Antimicrobial Properties

Synthesis of Copper Nanoparticles Stabilized with Organic Ligands and Their Antimicrobial Properties

Irreversible photo-Fenton-like triggered agglomeration of ultra-small gold nanoparticles capped with crosslinkable materials

Covalently γ-aminobutyric acid-functionalized carbon nanotubes: improved compatibility with PHBV matrix

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