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 |
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Keywords
- Charge transfer
- Complex oxides
- EPR
- Mechanochemical reaction
- Solid state nmr
ASJC Scopus subject areas
- Electrochemistry
- Physical and Theoretical Chemistry
- Energy Engineering and Power Technology
- Materials Chemistry
- Condensed Matter Physics
Cite this
NMR and EPR studies on the charge transfer and formation of complexes through incompletely coordinated states. / Senna, Mamoru; Isobe, Tetsuhiko.
In: Solid State Ionics, Vol. 101-103, No. PART 1, 11.1997, p. 387-392.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - NMR and EPR studies on the charge transfer and formation of complexes through incompletely coordinated states
AU - Senna, Mamoru
AU - Isobe, Tetsuhiko
PY - 1997/11
Y1 - 1997/11
N2 - 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.
AB - 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.
KW - Charge transfer
KW - Complex oxides
KW - EPR
KW - Mechanochemical reaction
KW - Solid state nmr
UR - http://www.scopus.com/inward/record.url?scp=0031273083&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0031273083&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0031273083
VL - 101-103
SP - 387
EP - 392
JO - Solid State Ionics
JF - Solid State Ionics
SN - 0167-2738
IS - PART 1
ER -