Electron Paramagnetic Resonance and Solid-State NMR Studies of the Surfactant Interphase in Polymer-Clay Nanocomposites

2012 ◽  
pp. 229-249
Author(s):  
Gunnar Jeschke
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Solid State ◽  
Solid State Nmr ◽  
Clay Nanocomposites ◽  
Nmr Studies ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

Anionic redox reactions and structural degradation in a cation-disordered rock-salt Li1.2Ti0.4Mn0.4O2 cathode material revealed by solid-state NMR and EPR

2020 ◽  
Vol 8 (32) ◽  
pp. 16515-16526 ◽  
Author(s):  
Fushan Geng ◽  
Bei Hu ◽  
Chao Li ◽  
Chong Zhao ◽  
Olivier Lafon ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Solid State ◽  
Rock Salt ◽  
Epr Spectroscopy ◽  
Solid State Nmr ◽  
Redox Reactions ◽  
Degradation Mechanism ◽  
Structural Degradation ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

The cation-disordered rock-salt Li1.2Ti0.4Mn0.4O2 is studied by solid-state NMR and electron paramagnetic resonance (EPR) spectroscopy during the first cycle. The anionic redox and structural degradation mechanism are discussed.

MAS NMR and EPR study of structural changes in talc and montmorillonite induced by grinding

Clay Minerals ◽  
2016 ◽  
Vol 51 (1) ◽  
pp. 69-80 ◽  
Author(s):  
Roger Borges ◽  
Lívia Macedo Dutra ◽  
Andersson Barison ◽  
Fernando Wypych
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Electron Paramagnetic Resonance ◽  
Solid State ◽  
Magnetic Resonance ◽  
Cation Exchange ◽  
Structural Changes ◽  
Environmental Changes ◽  
Milling Process ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

AbstractThe milling process in the solid-state 2:1 clay minerals, montmorillonite and talc, which have different cation exchange capacities, is reported here. Several instrumental techniques were used to monitor systematically the products formed. The dehydroxylation/amorphization of the montmorillonite and talc structures occurs within 3 and 6 h of milling, respectively. Electron paramagnetic resonance spectra indicated that structural Mn2+ was oxidized more quickly in the montmorillonite structure than in talc, while the paramagnetic defects increased during milling. Nuclear magnetic resonance was also used to monitor the environmental changes for Si and Al during milling.

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