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| Aggregation-induced emission enhancement of yellow photoluminescent carbon dots for highly selective detection of environmental and intracellular copper(II) ions |
| Wenyi Lva, Min Lina, Rongsheng Lia, Qianqian Zhangb, Hui Liua, Jian Wanga, Chengzhi Huanga,b |
a Key Laboratory of Luminescent and Real-Time Analytical Chemistry(Southwest University), Ministry of Education, College of Pharmaceutical Science, Southwest University, Chongqing 400715, China;
b Chongqing Key Laboratory of Biomedical Analysis(Southwest University), Chongqing Science & Technology Commission, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China |
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| Guide Photoluminescent (PL) carbon nanodots (CDs) are prepared through a simple one-step hydrothermal treatment of o-phenylendiamine (OPD), and the as-prepared OPD-CDs show yellow PL emission under the ultraviolet excitation, which can be further enhanced by Cu2+ ions owing to Cu2+ ions induced aggregation of OPD-CDs through the coordination of Cu2+ with amino groups on the surface of OPD-CDs. |
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Abstract Carbon dots (CDs) are prepared through a simple one-step hydrothermal treatment of o-phenylendiamine (OPD) and show yellow photoluminescent (PL) emission under the ultraviolet excitation, which can be further enhanced by Cu2+ ions owing to Cu2+ ions induced aggregation of OPD-CDs through the coordination of Cu2+ with amino groups on the surface of OPD-CDs. The aggregation induced emission enhancement (AIEE) property enables it feasible to develop a simple, sensitive and selective method to detect environmental and intracellular copper (Ⅱ) ions. The limit of detection as lowas 0.28 μmol/L (3σ/k) and a dynamic range from 0.5 μmol/L to 40 μmol/L make it veryeasy to detect the copper content inwater samples, such as river closure reservoir. Furthermore, fluorescence imaging of intracellular Cu2+ suggests that the AIEE features of OPD-CDs specific to Cu2+ ions can be also applied in biological systems.
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Received: 01 March 2019
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| Fund:This work is financially supported by the National Natural Science Foundation of China (NSFC, No. 21535006). |
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Corresponding Authors:
Jian Wang, Chengzhi Huang
E-mail: wj123456@swu.ewdu.cn;chengzhi@swu.edu.cn
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