New-coated fluorescent silver nanoparticles with a fluorescein thiol esther derivative: Fluorescent enhancement upon interaction with heavy metal ions

Javier Fernandez Lodeiro, Cristina Nunez, Adrian Fernandez-Lodeiro, Elisabete Oliveira, Benito Rodriguez-Gonzalez, Alcindo A. dos Santos, José Luis Capelo, Carlos Lodeiro

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

A new fluorescein thiol esther derivativeL was successfully synthesized and fully characterized.The interaction of compound L with sphericalsilver nanoparticles (AgNPs) was explored in toluene,through the exchange of the tetraoctylammoniumbromated (TOAB) molecules stabilizing the silvernanoparticle surface (AgNPs@TOAB). A new hybridsystem AgNPs@L was obtained in which an intensemetal-enhancement fluorescence phenomenon takesplace. The behaviour of the new-coated Ag-NPs@L system was explored in the presence of silenttoxic metal ions, such as Hg2?, Pb2? and Tl? inorganic phase. Surprisingly, systemAgNPs@Lrevealsto be sensitive to Hg2? ions over the other heavy metalions studied.
Original languageEnglish
Pages (from-to)2315
JournalJournal Of Nanoparticle Research
Volume16
Issue number3
DOIs
Publication statusPublished - Mar 2014

Keywords

  • Biological effects
  • Fluorescein
  • HRTEM
  • MEF
  • Silver nanoparticles
  • TEM

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