Shi, Wenying; Lin, Yanjun; Kong, Xianggui; Zhang, Shitong; Jia, Yankun; Wei, Min; Evans, David G.; Duan, Xue published the artcile< Fabrication of pyrenetetrasulfonate/layered double hydroxide ultrathin films and their application in fluorescence chemosensors>, Application of C19H34O2, the main research area is fabrication pyrenetetrasulfonate layered hydroxide ultrathin film fluorescence chemosensor.
This paper reports the fabrication of fluorescence indicator/layered double hydroxide (LDH) ultrathin films (UTFs) by alternate assembly of 1,3,6,8-pyrenetetrasulfonic 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-visible absorption spectroscopy indicates a stepwise and regular growth of the PTS/LDH UTFs upon increasing deposition cycles. X-ray diffraction, at. force microscopy and SEM demonstrate that the UTFs possess a periodical layered structure perpendicular to the substrates with a thickness of 1.93-1.98 nm per bilayer. Also, 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 (relative standard deviation <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. 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 chem. composition, surface morphol. and fluorescence anisotropy. Therefore, this work provides new opportunities for fabrication and application of chromophore/LDH UTFs which can be used as fluorescence chemosensors. Journal of Materials Chemistry published new progress about Fluorescence quenching. 112-63-0 belongs to class esters-buliding-blocks, and the molecular formula is C19H34O2, Application of C19H34O2.
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