NMR and EPR studies on the charge transfer and formation of complexes through incompletely coordinated states

Mamoru Senna, Tetsuhiko Isobe

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Changes in the state of coordination and electron distribution in a fine paniculate solid mixture under mechanical stressing are studied by solid state nuclear magnetic resonance (NMR) and electron paramagnetic resonance (EPR), coupled with more conventional analytical tools, e.g., X-ray photoelectron spectroscopy or infrared spectroscopy. Systems examined are mainly Ca(OH)2 + SiO2 and metallic Al + hydrogel, TiO2H2O. Si-O-Ca or Al-O-Ti bridging bonds are formed either by charge transfer, i.e. an acid-base reaction in a broad definition, or by radical recombination. The charge transfer is also elucidated on the basis of electronegativity equalization, by taking low-coordination states into account.

Original languageEnglish
Pages (from-to)387-392
Number of pages6
JournalSolid State Ionics
Volume101-103
Issue numberPART 1
Publication statusPublished - 1997 Nov

Keywords

  • Charge transfer
  • Complex oxides
  • EPR
  • Mechanochemical reaction
  • Solid state nmr

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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