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This article discusses the development of a luminescence probe based on Zr-MOFs for the detection of copper ions in water. The probe, called Eu(DPA)3@UIO-66-NH2, emits blue and red light and has high sensitivity and selectivity for copper ions. It has the potential to detect trace amounts of copper in water samples, which could be useful for disease prevention and detection. The research was supported by funding from the National Natural Science Foundation of China and the Educational Committee of Hebei Province. [Extracted from the article]

In this work, organic-inorganic hybrid ultrathin transparent films (UTFs), produced by layer-by-layer (LBL) assembly of the europium inclusion complex of -cyclodextrin (-CD) and Mg-Al-layered double hydroxide (MgAl-NO3-LDHs) nanosheets, are reported. UV-visible (UV-Vis) absorption and fluorescence spectroscopy show orderly growth of the europium inclusion complex of -CD/layered double hydroxide (EICC/LDH) films with an increasing number of deposition cycles. X-ray diffraction and scanning electron microscopy measurements indicate that the films feature periodic layered structures with uniform surface morphology. Moreover, when EICC is assembled with inorganic rigid LDH nanosheets, the lifetimes are prolonged due to the isolation effect, and the UTFs are transparent with high brightness, which indicate that these films could serve as new optical materials. Transparent and high-brightness fluorescent ultrathin films (UTFs) were fabricated via layer-by-layer assembly deposition of europium inclusion of -cyclodextrin (EICC) and MgAl-NO3- layered dual hydroxide (LDH) nanosheets. EICC was assembled with inorganic rigid LDH nanosheets, which prolonged the lifetimes. The UTF showed a periodic long-range ordered and regular structure and tunable red emission intensity. These hybrid films have considerable potential for applications in the design of various LDH-based optical devices. [ABSTRACT FROM AUTHOR]