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 language | English |
|---|---|
| Pages (from-to) | 387-392 |
| Number of pages | 6 |
| Journal | Solid State Ionics |
| Volume | 101-103 |
| Issue number | PART 1 |
| Publication status | Published - 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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Senna, M., & Isobe, T. (1997). NMR and EPR studies on the charge transfer and formation of complexes through incompletely coordinated states. Solid State Ionics, 101-103(PART 1), 387-392.