摘要
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.
Carbon dots（CDs）are p repared through a simple one-step hydrothermal treatment of o-phe nylendiamine（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 e nvironmental and intracellular copper（Ⅱ）ions.The limit of detection as low as 0.28 μmol/L（3σ/k）and a dynamic range from 0.5 μmol/L to 40 μmol/L make it very easy to detect the copper content in water samples,such as river closure reservoir.Furthermore,fluo re scence imaging of intracellular Cu2+suggests that the AIEE features of OPD-CDs specific to Cu2+ions can be also applied in biological systems.
基金
financially supported by the National Natural Science Foundation of China (NSFC, No. 21535006)
