One-Step Synthesis of Diamine-Functionalized Graphene Quantum Dots from Graphene Oxide and Their Chelating and Antioxidant Activities

被引：48

作者：

El-Hnayn, Rabeb ^{[1
]}

Canabady-Rochelle, Laetitia ^{[2
]}

Desmarets, Christophe ^{[3
]}

Balan, Lavinia ^{[4
,5
]}

Rinnert, Herve ^{[6
]}

Joubert, Olivier ^{[6
]}

Medjahdi, Ghouti ^{[6
]}

Ben Ouada, Hafedh ^{[1
]}

Schneider, Raphael ^{[2
]}

机构：

[1] Fac Sci Monastir, Lab Interfaces & Mat Avances, Ave Environm, Monastir 5019, Tunisia

[2] Univ Lorraine, CNRS, LRGP, F-54000 Nancy, France

[3] Sorbonne Univ, CNRS, UMR 8232, Inst Parisien Chim Mol, 4 Pl Jussieu, F-75252 Paris 5, France

[4] CNRS, UMR, IS2M, 15 Rue Jean Starcky, F-68093 Mulhouse, France

[5] CNRS, UPR3079, CEMHTI, Site Haute Temp,1D Ave Rech Sci, F-45071 Orleans, France

[6] Univ Lorraine, CNRS, IJL, F-54506 Vandoeuvre Les Nancy, France

来源：

NANOMATERIALS | 2020年 / 10卷 / 01期

关键词：

graphene quantum dots; 2; 2'-(ethylenedioxy)bis(ethylamine); optical properties; redox-active nanoparticles; FLUORESCENT CARBON DOTS; PHOTOLUMINESCENCE MECHANISM; REDUCTION; NANOCOMPOSITES; PEPTIDES; NANODOTS; CATALYST; HYBRIDS; ORIGIN; ACID;

D O I：

10.3390/nano10010104

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页数：18

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