4.7 Article

Electrogenerated Chemiluminescence Behavior of Au nanoparticles-hybridized Pb (II) metal-organic framework and its application in selective sensing hexavalent chromium

Journal

SCIENTIFIC REPORTS
Volume 6, Issue -, Pages -

Publisher

NATURE PUBLISHING GROUP
DOI: 10.1038/srep22059

Keywords

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Funding

  1. Natural Science Foundation of China [21175057, 21375047, 21377046, 21575050, 21505051]
  2. Science and Technology Plan Project of Jinan [201307010]
  3. Science and Technology Development Plan of Shandong Province [2014GSF120004]
  4. Special Project for Independent Innovation and Achievements Transformation of Shandong Province [2014ZZCX05101]
  5. Shandong Province and UJN [ts20130937]

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In this work, a novel electrochemiluminescence (ECL) sensor based on Au nanoparticles-hybridized Pb (II)-beta-cyclodextrin (Pb-beta-CD) metal-organic framework for detecting hexavalent chromium (Cr(VI)) was developed. Pb-beta-CD shows excellent ECL behavior and unexpected reducing ability towards Au ions. Au nanoparticles could massively form on the surface of Pb-beta-CD (Au@Pb-beta-CD) without use of any additional reducing agent. In the presence of coreactant K2S2O8, the ECL emission of Pb-beta-CD was enhanced by the formation of Au nanoparticles. Cr(VI) can collisionally quench the ECL behavior of Au@Pb-beta-CD/S2O82- system and the detection mechanism was investigated. This ECL sensor is found to have a linear response in the range of 0.01-100 mu M and a low detection limit of 3.43 nM (S/N = 3) under the optimal conditions. These results suggest that metal-organic framework Au@Pb-beta-CD has great potential in extending the application in the ECL field as an efficient luminophore.

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