Location and Motion of Isotropic Paramagnetic Centres in Synthetic Monohydrocalcite
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概要
- 論文の詳細を見る
The isotropic CO^-_2 and CO^-_3 centres in CaCO_3・H_2O were examined with electron spin resonance (ESR), electron-nuclear double resonance (ENDOR) and thermogravimetric analysis (TGA). From the absence of anisotropy and the small value of the ^1H ENDOR splitting (〜0.3 MHz), the effect of crushing and/or thermal annealing on the ESR and TGA spectra, it is concluded that both isotropic centres are located in the occluded water, surrounding the constituent crystallites of the spherulites. ESR line width and ^<13>C hyperfine coupling parameter measurements yield approximate values for the rotation activation energy (ΔE (CO^-_3)<ΔE (CO^-_2) with ΔE〜0.2 eV) and for the vibrational frequency (〜2.10^<12>Hz for CO^-_2).
- 社団法人応用物理学会の論文
- 1994-07-15
著者
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Debuyst Rone
Universite Catholique De Louvain Laboratoire De Chimie Inorganique Et Nucleaire
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IDRISSI Samira
Universite catholique de Louvain, Laboratoire de chimie inorganique et nucleaire
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CALLENS Freddy
Universiteit Gent, Laboratorium voor Kristallografie en Studie van de Vaste Stof
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MOENS Peter
Universiteit Gent, Laboratorium voor Kristallografie en Studie van de Vaste Stof
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DEJEHET Fernand
Universite catholique de Louvain, Laboratoire de chimie inorganique et nucleaire
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Moens Peter
Universiteit Gent Laboratorium Voor Kristallografie En Studie Van De Vaste Stof
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Dejehet Fernand
Universite Catholique De Louvain Laboratoire De Chimie Inorganique Et Nucleaire
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Callens Freddy
Universiteit Gent Laboratorium Voor Kristallografie En Studie Van De Vaste Stof
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Idrissi Samira
Universite Catholique De Louvain Laboratoire De Chimie Inorganique Et Nucleaire
関連論文
- An Electron Nuclear Double Resonance and Electron Spin Resonance Study of Isotropic CO^-_2 and SO^-_2 Radicals in Natural Carbonates
- Decay Kinetics for Isotropic Radicals in Carbonates
- Location and Motion of Isotropic Paramagnetic Centres in Synthetic Monohydrocalcite