One-Step Synthesis of Diamine-Functionalized Graphene Quantum Dots from Graphene Oxide and Their Chelating and Antioxidant Activities
2,2’-(Ethylenedioxy)bis(ethylamine)-functionalized graphene quantum dots (GQDs) were prepared under mild conditions from graphene oxide (GO) via oxidative fragmentation. The as-prepared GQDs have an average diameter of ca. 4 nm, possess good colloidal stability, and emit strong green-yello...
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MDPI AG
2020-01-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/10/1/104 |
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| author | Rabeb El-Hnayn Laetitia Canabady-Rochelle Christophe Desmarets Lavinia Balan Hervé Rinnert Olivier Joubert Ghouti Medjahdi Hafedh Ben Ouada Raphaël Schneider |
| author_facet | Rabeb El-Hnayn Laetitia Canabady-Rochelle Christophe Desmarets Lavinia Balan Hervé Rinnert Olivier Joubert Ghouti Medjahdi Hafedh Ben Ouada Raphaël Schneider |
| author_sort | Rabeb El-Hnayn |
| collection | DOAJ |
| description | 2,2’-(Ethylenedioxy)bis(ethylamine)-functionalized graphene quantum dots (GQDs) were prepared under mild conditions from graphene oxide (GO) via oxidative fragmentation. The as-prepared GQDs have an average diameter of ca. 4 nm, possess good colloidal stability, and emit strong green-yellow light with a photoluminescence (PL) quantum yield of 22% upon excitation at 375 nm. We also demonstrated that the GQDs exhibit high photostability and the PL intensity is poorly affected while tuning the pH from 1 to 8. Finally, GQDs can be used to chelate Fe(II) and Cu(II) cations, scavenge radicals, and reduce Fe(III) into Fe(II). These chelating and reducing properties that associate to the low cytotoxicity of GQDs show that these nanoparticles are of high interest as antioxidants for health applications. |
| first_indexed | 2024-12-10T19:21:32Z |
| format | Article |
| id | doaj.art-fd979025d4434824bee66e0137b2b3ef |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-12-10T19:21:32Z |
| publishDate | 2020-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-fd979025d4434824bee66e0137b2b3ef2022-12-22T01:36:29ZengMDPI AGNanomaterials2079-49912020-01-0110110410.3390/nano10010104nano10010104One-Step Synthesis of Diamine-Functionalized Graphene Quantum Dots from Graphene Oxide and Their Chelating and Antioxidant ActivitiesRabeb El-Hnayn0Laetitia Canabady-Rochelle1Christophe Desmarets2Lavinia Balan3Hervé Rinnert4Olivier Joubert5Ghouti Medjahdi6Hafedh Ben Ouada7Raphaël Schneider8Laboratoire des Interfaces et des Matériaux Avancés, Faculté des Sciences de Monastir, Avenue de l’Environnement, 5019 Monastir, TunisiaLaboratoire Réactions et Génie des Procédés, LRGP, Université de Lorraine, CNRS, F-54000 Nancy, FranceInstitut Parisien de Chimie Moléculaire UMR-CNRS 8232, Sorbonne Université, 4 Place Jussieu, 75252 Paris CEDEX 5, FranceInstitut de Science des Matériaux de Mulhouse (IS2M), CNRS, UMR 7361, 15 rue Jean Starcky, 68093 Mulhouse, FranceInstitut Jean Lamour, Université de Lorraine, CNRS, IJL, 54506 Vandoeuvre-lès-Nancy CEDEX, FranceInstitut Jean Lamour, Université de Lorraine, CNRS, IJL, 54506 Vandoeuvre-lès-Nancy CEDEX, FranceInstitut Jean Lamour, Université de Lorraine, CNRS, IJL, 54506 Vandoeuvre-lès-Nancy CEDEX, FranceLaboratoire des Interfaces et des Matériaux Avancés, Faculté des Sciences de Monastir, Avenue de l’Environnement, 5019 Monastir, TunisiaLaboratoire Réactions et Génie des Procédés, LRGP, Université de Lorraine, CNRS, F-54000 Nancy, France2,2’-(Ethylenedioxy)bis(ethylamine)-functionalized graphene quantum dots (GQDs) were prepared under mild conditions from graphene oxide (GO) via oxidative fragmentation. The as-prepared GQDs have an average diameter of ca. 4 nm, possess good colloidal stability, and emit strong green-yellow light with a photoluminescence (PL) quantum yield of 22% upon excitation at 375 nm. We also demonstrated that the GQDs exhibit high photostability and the PL intensity is poorly affected while tuning the pH from 1 to 8. Finally, GQDs can be used to chelate Fe(II) and Cu(II) cations, scavenge radicals, and reduce Fe(III) into Fe(II). These chelating and reducing properties that associate to the low cytotoxicity of GQDs show that these nanoparticles are of high interest as antioxidants for health applications.https://www.mdpi.com/2079-4991/10/1/104graphene quantum dots2,2’-(ethylenedioxy)bis(ethylamine)optical propertiesredox-active nanoparticles |
| spellingShingle | Rabeb El-Hnayn Laetitia Canabady-Rochelle Christophe Desmarets Lavinia Balan Hervé Rinnert Olivier Joubert Ghouti Medjahdi Hafedh Ben Ouada Raphaël Schneider One-Step Synthesis of Diamine-Functionalized Graphene Quantum Dots from Graphene Oxide and Their Chelating and Antioxidant Activities Nanomaterials graphene quantum dots 2,2’-(ethylenedioxy)bis(ethylamine) optical properties redox-active nanoparticles |
| title | One-Step Synthesis of Diamine-Functionalized Graphene Quantum Dots from Graphene Oxide and Their Chelating and Antioxidant Activities |
| title_full | One-Step Synthesis of Diamine-Functionalized Graphene Quantum Dots from Graphene Oxide and Their Chelating and Antioxidant Activities |
| title_fullStr | One-Step Synthesis of Diamine-Functionalized Graphene Quantum Dots from Graphene Oxide and Their Chelating and Antioxidant Activities |
| title_full_unstemmed | One-Step Synthesis of Diamine-Functionalized Graphene Quantum Dots from Graphene Oxide and Their Chelating and Antioxidant Activities |
| title_short | One-Step Synthesis of Diamine-Functionalized Graphene Quantum Dots from Graphene Oxide and Their Chelating and Antioxidant Activities |
| title_sort | one step synthesis of diamine functionalized graphene quantum dots from graphene oxide and their chelating and antioxidant activities |
| topic | graphene quantum dots 2,2’-(ethylenedioxy)bis(ethylamine) optical properties redox-active nanoparticles |
| url | https://www.mdpi.com/2079-4991/10/1/104 |
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