title: Preparation, characterization and Hg(II)-sensing behavior of an up-conversion nanocomposite grafted by a rhodamine derived probe: a potential application for eco-industrial park.
abstract: In the present work, we designed and synthesized a rhodamine derived "off-on" probe for Hg(II) detection, which might be potentially used in eco-industrial park. By grafting this probe onto the surface of an up-conversion NaYF4:Yb(3+)/Er(3+) excitation source, a Hg(II) sensing system was resulted. The nanocomposite was carefully characterized and analyzed by electron microscopy images, XRD analysis, IR spectra, thermogravimetry, UV-Vis absorption and fluorescence emission. Experimental data confirmed the structure of the nanocomposite. There was an efficient energy transfer between the excitation source and the probe, which made the nanocomposite a promising sensing system. The spectral response towards Hg(II) suggested that the fluorescence intensity of the nanocomposite increased with the increasing Hg(II) concentration, showing "off-on" effect. What's more, the fluorescence signal of the nanocomposite was insensitive towards other metal ions, showing unique selectivity towards Hg(II).
authors.affiliation: College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China. Electronic address: zou_ds01@163.com.
authors.forename: Zou
authors.initials: Z
authors.lastname: Dong-sheng
authors.forename: Zhai
authors.initials: Z
authors.lastname: Da-shun
authors.forename: Sun
authors.initials: S
authors.lastname: Hai-yan
authors.forename: Kun
authors.initials: K
authors.lastname: Zhang
mesh_terms: D004871:Erbium / Q000737:chemistry; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry*; D005459:Fluorides / Q000737:chemistry; D008628:Mercury / Q000032:analysis*; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure; D012235:Rhodamines / Q000737:chemistry*; D015018:Ytterbium / Q000737:chemistry; D015019:Yttrium / Q000737:chemistry
chemical_list: D005456:Fluorescent Dyes; D012235:Rhodamines; C525362:sodium yttriumtetrafluoride; D015019:Yttrium; D004871:Erbium; D008628:Mercury; D015018:Ytterbium; D005459:Fluorides
keywords: Eco-industrial park; Hg(II); Rhodamine derivative; Sensor; Upconversion nanobars