Tuning the Functional Groups on Carbon Nanodots and Antioxidant Studies.
antioxidation
carbon nanodots
charge transfer
electro-chemistry
functional groups
radical scavenging
Journal
Molecules (Basel, Switzerland)
ISSN: 1420-3049
Titre abrégé: Molecules
Pays: Switzerland
ID NLM: 100964009
Informations de publication
Date de publication:
02 Jan 2019
02 Jan 2019
Historique:
received:
14
11
2018
revised:
08
12
2018
accepted:
12
12
2018
entrez:
6
1
2019
pubmed:
6
1
2019
medline:
28
10
2019
Statut:
epublish
Résumé
Carbon nanodots (CNDs) have shown good antioxidant capabilities by scavenging oxidant free radicals such as diphenyl-1-picrylhydrazyl radical (DPPH•) and reactive oxygen species. While some studies suggest that the antioxidation activities associate to the proton donor role of surface active groups like carboxyl groups (⁻COOH), it is unclear how exactly the extent of oxidant scavenging potential and its related mechanisms are influenced by functional groups on CNDs' surfaces. In this work, carboxyl and the amino functional groups on CNDs' surfaces are modified to investigate the individual influence of intermolecular interactions with DPPH• free radical by UV-Vis spectroscopy and electrochemistry. The results suggest that both the carboxyl and the amino groups contribute to the antioxidation activity of CNDs through either a direct or indirect hydrogen atom transfer reaction with DPPH•.
Identifiants
pubmed: 30609752
pii: molecules24010152
doi: 10.3390/molecules24010152
pmc: PMC6337175
pii:
doi:
Substances chimiques
Amines
0
Antioxidants
0
Biphenyl Compounds
0
Carboxylic Acids
0
Free Radicals
0
Picrates
0
Carbon
7440-44-0
1,1-diphenyl-2-picrylhydrazyl
DFD3H4VGDH
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : National Science Foundation
ID : 1832134
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