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发布时间：2019-03-12

论文类型：期刊论文

发表时间：2017-05-25

发表刊物：ADVANCED FUNCTIONAL MATERIALS

收录刊物：EI、SCIE

卷号：27

期号：20

ISSN号：1616-301X

摘要：Hybrid materials displaying multistage security behavior, where a single material shows both wavelength-and temperature-dependent luminescence properties, are reported. The materials consist of mixed-lanthanide beta-diketonate complexes grafted into the pores of a nanosized 2,2'-bipyridine-5,5'-dicarboxylate-acid MOF. A very specific choice of lanthanides and their ratios, as well as beta-diketonate ligand, is crucial for obtaining the desired properties. The wavelength-dependent luminescence properties of the materials are very well matched with the excitation wavelengths of a standard UV lamp, and a clearly visible change in luminescence is observed in a narrow temperature range (slightly below and above room temperature), proving them to be excellent materials for use in anti-counterfeit technologies, which would be almost impossible to mimic.