Proton mobility in Ruddlesden−Popper phase H2La2Ti3O10 studied by 1H NMR

Marina Shelyapina, Denis Nefedov, Artem Kostromin, Oleg Silyukov, Irina Zvereva

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

To study protons localization in H 1.83 K 0.17 La 2 Ti 3 O 10 ·0.17H 2 O and their motional characteristics, complementary Nuclear Magnetic Resonance (NMR) techniques have been applied. 1 H Magic Angle Spinning NMR evidences the presence of different proton containing species. By analyzing the temperature dependence of the 1 H MAS NMR spectrum we attribute the observed lines to interlayer H + in regular sites (isolated and in water rich environment), water protons and protons from various defects. The temperature behaviors of the spectral lines intensities and widths point out that intercalated water molecules are involved in translational motion that is confirmed by spin lattice relaxation rate (R 1 ) and spin-lattice relaxation rate in rotating frame (R ) measurements. It has been shown that for a correct determination of the proton motional parameters the Kohlrausch-Williams-Watts correlation function must be used. Its application results in the following parameters of proton motion in the interlayer space of H 1.83 K 0.17 La 2 Ti 3 O 10 ·0.17H 2 O: E a = 0.194(2) eV, β = 0.28(1), τ 0 =6.2(1)×10 −10 s.

Original languageEnglish
Pages (from-to)5788-5795
Number of pages8
JournalCeramics International
Volume45
Issue number5
Early online date7 Dec 2018
DOIs
StatePublished - 2019

Scopus subject areas

  • Physics and Astronomy(all)
  • Chemistry(all)
  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Process Chemistry and Technology

Keywords

  • Layered perovskite-like titanate
  • MAS NMR
  • Ruddlesden–Popper phase
  • Spin-lattice relaxation
  • LN
  • SELF-DIFFUSION
  • PEROVSKITE-LIKE OXIDES
  • IONIC-CONDUCTIVITY
  • HYDRATION
  • HYDROGEN
  • NMR
  • Ruddlesden-Popper phase
  • LA
  • DYNAMICS
  • DIELECTRIC-RELAXATION BEHAVIOR

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