Chemically Nonequivalent Sites in Mesoporous BCN Revealed by Solid-state NMR at 21.8 T

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  • Miwa Murakami
    Advanced Nano Characterization Center, National Institute for Materials Science
  • Tadashi Shimizu
    Advanced Nano Characterization Center, National Institute for Materials Science
  • Masataka Tansho
    Advanced Nano Characterization Center, National Institute for Materials Science
  • Ajayan Vinu
    Fuel Cell Materials Center, National Institute for Materials Science
  • Katsuhiko Ariga
    Fuel Cell Materials Center, National Institute for Materials Science
  • Kiyonori Takegoshi
    Department of Chemistry, Graduate School of Science, Kyoto University

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<jats:title>Abstract</jats:title> <jats:p>Solid-state 11B magic-angle spinning (MAS) NMR studies on novel mesoporous BCN material are described. While the 11B MAS spectrum at 11.7 T shows severe signal overlap as a result of the second-order quadrupolar broadening, the resolution improves significantly at 21.8 T and three distinct peaks are observed, indicating the presence of three sites in the material. Possible microstructures of the three sites are discussed in terms of their isotropic chemical shifts, quadrupolar coupling constants, and asymmetric parameters determined from spectral simulation.</jats:p>

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  • Chemistry Letters

    Chemistry Letters 35 (9), 986-987, 2006-07-29

    Oxford University Press (OUP)

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