Free radical scavenger properties of metal-fullerenes: C60 and C82 with Cu, Ag and Au (atoms and tetramers)

Andrade, E.; Martı́nez, Ana

doi:10.1016/j.comptc.2017.06.015

Cited by 23 publications

(9 citation statements)

References 68 publications

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“…LANL2DZ effective core potential includes relativistic effects. This methodology has been used previously to study the interaction of metal clusters with small molecules . Initial geometries for anionic Au N − clusters ( N = 3‐8) were described in a previous report .…”

Section: Methodsmentioning

confidence: 99%

Binding of multiple SO₂ molecules to small gold cluster anions (Au_N⁻, Au_NOH⁻, N = 1‐8)

Reina

Wallace

Wyrwas

et al. 2019

Int J of Quantum Chemistry

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The binding of SO 2 on gas-phase gold cluster anions, Au N − , and their hydroxide counterparts, Au N OH − , have been studied using density functional theory combined with flow reactor/time-of-flight mass spectrometry techniques. SO 2 is adsorbed on all of the Au N − and Au N OH − clusters (N = 1-8) and the hydroxide clusters are more active than the bare anionic clusters. Successive additions of SO 2 molecules (up to four) have been analyzed. In all cases, anionic clusters are shown to bind multiple SO 2 molecules. Theoretical analyses are in agreement with the experimental results,showing that the addition of more than one molecule is thermodynamically favorable.Larger clusters do not necessarily absorb more molecules, as different SO 2 binding motifs on these clusters are present. These results provide important insight for the potential use of these anionic clusters as SO 2 hunters. K E Y W O R D Sanionic small gold clusters, DFT, mass spectrometry, successive SO 2 adsorption

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Section: Methodsmentioning

confidence: 99%

Binding of multiple SO₂ molecules to small gold cluster anions (Au_N⁻, Au_NOH⁻, N = 1‐8)

Reina

Wallace

Wyrwas

et al. 2019

Int J of Quantum Chemistry

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“…The structure of C 60 makes it capable of reacting with free radicals, such as superoxide, hydroxyl radicals, and hydrogen peroxide [ 45 ]. Two different fullerenes, C 60 and C 82 , conjugated with three transition metals, were used as an antioxidant [ 46 ]. The antioxidant ability of C 60 has been widely used in cosmetics and skincare products as an antiageing agent [ 47 ].…”

Section: Discussionmentioning

confidence: 99%

Water-Soluble, Alanine-Modified Fullerene C60 Promotes the Proliferation and Neuronal Differentiation of Neural Stem Cells

Ren

Peng

et al. 2022

IJMS

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As carbon-based nanomaterials, water-soluble C60 derivatives have potential applications in various fields of biomedicine. In this study, a water-soluble fullerene C60 derivative bearing alanine residues (Ala-C60) was synthesized. The effects of Ala-C60 on neural stem cells (NSCs) as seed cells were explored. Ala-C60 can promote the proliferation of NSCs, induce NSCs to differentiate into neurons, and inhibit the migration of NSCs. Most importantly, the Ala-C60 can significantly increase the cell viability of NSCs treated with hydrogen peroxide (H2O2). The glutathioneperoxidase (GSH-Px) and superoxide dismutase (SOD) activities and glutathione (GSH) content increased significantly in NSCs treated even by 20 μM Ala-C60. These findings strongly indicate that Ala-C60 has high potential to be applied as a scaffold with NSCs for regeneration in nerve tissue engineering for diseases related to the nervous system.

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“…Thus, the higher quenching efficiency of C 70 and Gd@C 82 can be attributed to its higher polarizability [ 58 ]. In addition, the reactivity upon A E -type reactions for fullerenes decreased from C 60 to Gd@C 82 [ 59 ] as the presence of endoatoms improves the fullerene antiradical capacity [ 60 ]. A 1.3-fold decrease in the quenching constant for Gd@C 82 could also be due to a different behavior in the chemiluminescence reaction, a change in the quenching mechanism to a bimolecular one [ 53 ] or another competing process at multiple positions of the fullerene cage [ 59 ].…”

Section: Discussionmentioning

confidence: 99%

Antioxidant Potential of Aqueous Dispersions of Fullerenes C60, C70, and Gd@C82

Mikheev

Sozarukova

Izmailov

et al. 2021

IJMS

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The antioxidant potential (capacity and activity) of aqueous fullerene dispersions (AFD) of non-functionalized C60, C70, and Gd@C82 endofullerene (in micromolar concentration range) was estimated based on chemiluminescence measurements of the model of luminol and generation of organic radicals by 2,2′-azobis(2-amidinopropane) dihydrochloride (ABAP). The antioxidant capacity was estimated by the TRAP method, from the concentration of half-suppression, and from the suppression area in the initial period. All three approaches agree and show that the antioxidant capacity of AFDs increased in the order Gd@C82 < C70 < C60. Mathematical modeling of the long-term kinetics data was used for antioxidant activity estimation. The effect of C60 and C70 is found to be quenching of the excited product of luminol with ABAP-generated radical and not an actual antioxidant effect; quenching constants differ insignificantly. Apart from quenching with a similar constant, the AFD of Gd@C82 exhibits actual antioxidant action. The antioxidant activity in Gd@C82 is 300-fold higher than quenching constants.

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Free radical scavenger properties of metal-fullerenes: C60 and C82 with Cu, Ag and Au (atoms and tetramers)

Cited by 23 publications

References 68 publications

Binding of multiple SO₂ molecules to small gold cluster anions (Au_N⁻, Au_NOH⁻, N = 1‐8)

Binding of multiple SO₂ molecules to small gold cluster anions (Au_N⁻, Au_NOH⁻, N = 1‐8)

Water-Soluble, Alanine-Modified Fullerene C60 Promotes the Proliferation and Neuronal Differentiation of Neural Stem Cells

Antioxidant Potential of Aqueous Dispersions of Fullerenes C60, C70, and Gd@C82

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Free radical scavenger properties of metal-fullerenes: C60 and C82 with Cu, Ag and Au (atoms and tetramers)

Cited by 23 publications

References 68 publications

Binding of multiple SO2 molecules to small gold cluster anions (AuN−, AuNOH−, N = 1‐8)

Binding of multiple SO2 molecules to small gold cluster anions (AuN−, AuNOH−, N = 1‐8)

Water-Soluble, Alanine-Modified Fullerene C60 Promotes the Proliferation and Neuronal Differentiation of Neural Stem Cells

Antioxidant Potential of Aqueous Dispersions of Fullerenes C60, C70, and Gd@C82

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Binding of multiple SO₂ molecules to small gold cluster anions (Au_N⁻, Au_NOH⁻, N = 1‐8)

Binding of multiple SO₂ molecules to small gold cluster anions (Au_N⁻, Au_NOH⁻, N = 1‐8)