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      Probing oxygen motion in disordered anionic conductors with 17O and 51V MAS NMR spectroscopy.

      1 ,
      Science (New York, N.Y.)

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          Abstract

          Identification of the local environments of the ions in a solid-state electrolyte that contribute to the ionic conductivity or remain trapped in the lattice represents a challenge for many experimental probes of structure. We show that high-resolution 17O magic angle spinning nuclear magnetic resonance (MAS NMR) spectra may be obtained even from the highly disordered, layered materials alpha-Bi4V2O11 and gamma-Bi4V1.7Ti0.3O10.85, in which the different oxide sites in the lattice may be distinguished. The sites responsible for anionic conduction were determined directly from the variable-temperature 17O NMR spectra, and correlation times for motion were estimated. Double-resonance 17O/51V NMR methods were used as confirmation of the assignments of the resonances and as a second experimental probe of motion that is sensitive to mobility involving oxide ion hops between the same crystallographic sites.

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          Author and article information

          Journal
          Science
          Science (New York, N.Y.)
          1095-9203
          0036-8075
          Aug 23 2002
          : 297
          : 5585
          Affiliations
          [1 ] Department of Chemistry, State University of New York at Stony Brook, Stony Brook, NY 11794-3400, USA.
          Article
          1074130
          10.1126/science.1074130
          12130662
          ee1c9be0-eb42-43d0-bb51-8073c4bf2546
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