Oxidation of tellurium dyes induced by mercury: More insights on the naked-eye and fluorescent Hg2+ detection

Antônio A. Soares-Paulino, Lilian Giroldo, Gizele Celante, Elisabete Oliveira, Sérgio M. Santos, Ricardo F. Mendes, Filipe A. Almeida Paz, Alexandre M. Fioroto, Pedro Vitoriano Oliveira, Silvia H. P. Serrano, Carlos Lodeiro, Alcindo A. dos Santos

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A new fluorescent probe based on Tellurium-Rhodamine (TR) was designed, synthetized and fully characterized by 1H NMR, 13C NMR, 125Te NMR, HRMS, IR and single crystal X-ray diffraction. A mechanism of Hg2+ detection, based on the oxidation of tellurium by Hg2+ was observed and fully understood. The new monomer chemosensor TR shows a high fluorescent quantum yield Φ = 0.41, excellent selectivity and good sensibility towards Hg2+, with a limit of detection of 2.95 μmol/L.

Original languageEnglish
Pages (from-to)208-216
Number of pages9
JournalDyes and Pigments
Volume160
DOIs
Publication statusPublished - 1 Jan 2019

Keywords

  • Fluorescent sensor
  • Mercury
  • Naked-eye
  • Rhodamine
  • Telluroxide

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    Soares-Paulino, A. A., Giroldo, L., Celante, G., Oliveira, E., Santos, S. M., Mendes, R. F., ... Santos, A. A. D. (2019). Oxidation of tellurium dyes induced by mercury: More insights on the naked-eye and fluorescent Hg2+ detection. Dyes and Pigments, 160, 208-216. https://doi.org/10.1016/j.dyepig.2018.07.055