Fluorescent ink has become an effective anti-counterfeiting material to prevent counterfeiters from making and selling fake products[1–4].From its practical application,an ideal fluorescent ink should be environmenta...Fluorescent ink has become an effective anti-counterfeiting material to prevent counterfeiters from making and selling fake products[1–4].From its practical application,an ideal fluorescent ink should be environmentally friendly,have high stability and good viscosity,and exhibit excellent luminescent performance.To obtain such fluorescent inks,different fluorescent materials,such as carbon dots[5–7],lanthanide-doped compounds[8–10],inorganic semiconductor complexes[11–13],organic dyes[14–16],metal-organic frameworks[17–19],lanthanide coordination compounds[20,21]and cluster compounds[22,23],have been used to prepare fluorescent inks.Although these fluorescent materials have their own advantages as fluorescent inks,they also have their own disadvantages.For example,organic dyes used as fluorescent inks often encounter the problems of aggregation-induced quenching and small Stokes shifts[14–16],while carbon dots suffer from unclear structures,and concerns about the reproducibility of carbon dots have affected their widespread use[5,6].展开更多
基金the National Natural Science Foundation of China(21673184 and 21721001)。
文摘Fluorescent ink has become an effective anti-counterfeiting material to prevent counterfeiters from making and selling fake products[1–4].From its practical application,an ideal fluorescent ink should be environmentally friendly,have high stability and good viscosity,and exhibit excellent luminescent performance.To obtain such fluorescent inks,different fluorescent materials,such as carbon dots[5–7],lanthanide-doped compounds[8–10],inorganic semiconductor complexes[11–13],organic dyes[14–16],metal-organic frameworks[17–19],lanthanide coordination compounds[20,21]and cluster compounds[22,23],have been used to prepare fluorescent inks.Although these fluorescent materials have their own advantages as fluorescent inks,they also have their own disadvantages.For example,organic dyes used as fluorescent inks often encounter the problems of aggregation-induced quenching and small Stokes shifts[14–16],while carbon dots suffer from unclear structures,and concerns about the reproducibility of carbon dots have affected their widespread use[5,6].
