XPS and 31P NMR inquiry of Eu3+-induced structural modification in SnO-containing phosphate glass

José A. Jiménez, Esteban Rosim Fachini, Chunqing Zhao

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

The influence of Eu3+ doping on the structural properties of SnO-containing phosphate glass has been investigated by X-ray photoelectron spectroscopy (XPS) and 31P nuclear magnetic resonance (NMR) spectroscopy. Oxygen 1s XPS data indicates that the Eu3+ doping results in a higher concentration of non-bridging oxygens in the glass matrix, whereas 31P NMR shows an increase in the terminal phosphate chain tetrahedral units, i.e. the amount of Q1 sites with only one bridging oxygen. Accordingly, both techniques agree with a depolymerization effect induced by the Eu3+ ions. Further, XPS reveals that together with the Eu3+ doping, the presence of Sn4+ is supported while the presence of Eu2+ is also indicated. The structural changes are then indicated to be a consequence of redox chemistry between Sn2+ and Eu3+ promoting a transition of tin from Sn2+ with a role as network former to Sn4+ acting as network modifier in the glass system.

Original languageEnglish (US)
Pages (from-to)470-474
Number of pages5
JournalJournal of Molecular Structure
Volume1164
DOIs
StatePublished - Jul 15 2018
Externally publishedYes

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Keywords

  • Glasses
  • Spectroscopy
  • Structural properties

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy
  • Organic Chemistry
  • Inorganic Chemistry

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