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• W2015439101 abstract "This paper reports the fabrication of fluorescence indicator/layered double hydroxide (LDH) ultrathin films (UTFs) by alternate assembly of 1,3,6,8-pyrenetetrasulfonat acid tetrasodium salt (PTS) and Zn–Al LDH nanosheets on quartz substrates using the layer-by-layer (LBL) deposition technique, and demonstrates their application as a fluorescence chemosensor for Cu2+. UV-vis absorption spectroscopy indicates a stepwise and regular growth of the PTS/LDH UTFs upon increasing deposition cycles. X-Ray diffraction, atomic force microscopy and scanning electron microscopy demonstrate that the UTFs possess a periodical layered structure perpendicular to the substrates with a thickness of 1.93–1.98 nm per bilayer. Furthermore, the fluorescence chemosensor with film thickness of 48 nm (24 bilayers) exhibits a broad linear response range for Cu2+ solution (0.6–50 μM), good repeatability (RSD less than 5% in 20 consecutive measurements), high photostability and storage stability (∼93.2% of its initial fluorescence intensity remains after one month) as well as excellent selectivity. In addition, the study on mechanism of measurement-regeneration cycle of the fluorescence chemosensor shows that Cu2+ enters/departs from the PTS/LDH UTF with reversible change in chemical composition, surface morphology and fluorescence anisotropy. Therefore, this work provides new opportunities for fabrication and application of chromophore/LDH UTFs which can be used as fluorescence chemosensors." @default.
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• W2015439101 date "2011-01-01" @default.
• W2015439101 modified "2023-10-12" @default.
• W2015439101 title "Fabrication of pyrenetetrasulfonate/layered double hydroxide ultrathin films and their application in fluorescence chemosensors" @default.
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• W2015439101 doi "https://doi.org/10.1039/c1jm00073j" @default.
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