Highly Photoluminescent Amino-Functionalized Graphene Quantum Dots Used for Sensing Copper Ions

被引：218

作者：

Sun, Hanjun ^{[1
,2
]}

Gao, Nan ^{[1
]}

Wu, Li ^{[1
,2
]}

Ren, Jinsong ^{[1
]}

Wei, Weili ^{[1
]}

Qu, Xiaogang ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Rare Earth Resource Utilizat, Lab Chem Biol,Div Biol Inorgan Chem, Changchun 130022, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100039, Peoples R China

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2013年 / 19卷 / 40期

关键词：

amination; copper; fluorescence; graphene; quantum dots; RECENT PROGRESS; LABEL-FREE; FLUORESCENT; CHEMOSENSORS; REDUCTION; SENSORS; PROBES; CU2+;

D O I：

10.1002/chem.201302268

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Herein, we report a new kind of highly fluorescent probe for Cu2+ sensing generated by hydrothermal treatment of graphene quantum dots (GQDs). After hydrothermal treatment in ammonia, the greenish-yellow fluorescent GQDs (gGQDs) with a low quantum yield (QY, 2.5%) are converted to amino-functionalized GQDs (afGQDs) with a high QY (16.4%). Due to the fact that Cu2+ ions have a higher binding affinity and faster chelating kinetics with N and O on the surface of afGQDs than other transition-metal ions, the selectivity of afGQDs for Cu2+ is much higher than that of gGQDs. Furthermore, afGQDs are biocompatible and eco-friendly, and the afGQDs with a positive charge can be easily taken up by cells, which makes it possible to sense Cu2+ in living cells. The strategy presented here is simple in design, economical, and offers a mix-and-detect protocol without dye-modified oligonucleotides or complex chemical modification.

引用

页码：13362 / 13368

页数：7

共 43 条

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