Cu(II) catalyzed oxidation of mercaptoacetic acid by methylene blue in acidic medium: Influence of solvent and morphology

Sharma, Ranjana; Pal, Mahender; Mishra, K. K.

doi:10.1080/10426507.2015.1085039

Cited by 2 publications

(2 citation statements)

References 23 publications

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“…To investigate the adsorption configuration of TGA on the Cu surface, the possible structural models were first constructed and geometrically optimized [54] . The adsorption configurations of TGA on the Cu(111) surface were obtained through theoretical calculations, combining the previous studies [55–58] . Figure 1 presents the most stable conformation of optimized structure of the TGA molecule.…”

Section: Resultsmentioning

confidence: 99%

“…[54] The adsorption configurations of TGA on the Cu(111) surface were obtained through theoretical calculations, combining the previous studies. [55][56][57][58] Figure 1 presents the most stable conformation of optimized structure of the TGA molecule. When TGA is adsorbed on the Cu(111) surface, there are five different adsorption structures, as shown in Figure 1b-1f.…”

Section: Adsorption Structures Of Thioglycolic Acidmentioning

confidence: 99%

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Adsorption Structures, Vibrational Raman Spectra and Chemical Binding Properties of Thioglycolic Acid on Cu(111) Surfaces: A DFT Study

Chen,

Xiao,

Lin

et al. 2024

ChemPhysChem

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Copper is widely used in everyday life and industrial production because of its good electrical and thermal conductivity. To overcome copper oxidation and maintain its good physical properties, small organic molecules adsorbed on the surface of copper make a passivated layer to further avoid copper corrosion. In this work, we have investigated thioglycolic acid (TGA, another name is mercaptoacetic acid) adsorbed on copper surfaces by using density functional theory (DFT) calculations and a periodical slab model. We first get five stable adsorption structures, and the binding interaction between TGA and Cu(111) surfaces by using density of states (DOS), indicating that the most stable configuration adopts a triple‐end binding model. Then, we analyze the vibrational Raman spectra of TGA adsorbed on the Cu(111) surface and make vibrational assignments according to the vibrational vectors. Finally, we explore the temperature effect of the thermodynamically Gibbs free energy of TGA on the Cu(111) surface and the antioxidant ability of the small organic molecular layer of copper oxidation on the copper surface. Our calculated results further provide evidences to interpret the stability of adsorption structures and antioxidant properties of copper.

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Section: Resultsmentioning

confidence: 99%

Section: Adsorption Structures Of Thioglycolic Acidmentioning

confidence: 99%

Adsorption Structures, Vibrational Raman Spectra and Chemical Binding Properties of Thioglycolic Acid on Cu(111) Surfaces: A DFT Study

Chen,

Xiao,

Lin

et al. 2024

ChemPhysChem

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Entropy-Controlled Cu(II)-Catalyzed Oxidation of N-Acetyl-L-Cysteine by Methylene Blue in Acidic Medium

Sharma

Pal

Mishra

2016

Zeitschrift Für Physikalische Chemie

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Kinetics of the oxidation of N-acetyl-L-cysteine (NAC) by methylene blue (MB) catalyzed by Cu(II) have been investigated in presence of HCl. The reaction follows a first order kinetics in MB while the concentration order in NAC is zero. Hydrogen ions retard the rate of reaction. The reaction involves the participation of nanoparticles as revealed by SEM, XRD and FTIR techniques and a gel-like Cu-NAC network acts like the effective catalyst. The reaction conforms to Eley-Rideal mechanism at lower [NAC] while at higher [NAC], the kinetics are explained by extended Eley-Rideal mechanism. The reaction is regulated by the size and morphology of the nanoparticles and is controlled by the entropy of activation.

show abstract

Cu(II) catalyzed oxidation of mercaptoacetic acid by methylene blue in acidic medium: Influence of solvent and morphology

Cited by 2 publications

References 23 publications

Adsorption Structures, Vibrational Raman Spectra and Chemical Binding Properties of Thioglycolic Acid on Cu(111) Surfaces: A DFT Study

Adsorption Structures, Vibrational Raman Spectra and Chemical Binding Properties of Thioglycolic Acid on Cu(111) Surfaces: A DFT Study

Entropy-Controlled Cu(II)-Catalyzed Oxidation of N-Acetyl-L-Cysteine by Methylene Blue in Acidic Medium

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