57Fe-Mössbauer spectroscopic studies on the mixed-valence states of oxo-centered trinuclear iron(II, III, III) complexes with fatty acid anions

1992 ◽  
Vol 68 (1-4) ◽  
pp. 233-236 ◽  
Author(s):  
Tadahiro Nakamoto ◽  
Motomi Katada ◽  
Hirotoshi Sano
Keyword(s):  
Fatty Acid ◽  
Mixed Valence ◽  
Spectroscopic Studies ◽  
57Fe Mössbauer ◽  
Valence States

Mössbauer and infrared spectroscopic studies of novel mixed valence states in cobaltous ferrocyanides and ferricyanides

1990 ◽  
Vol 53 (1-4) ◽  
pp. 391-395 ◽  
Author(s):  
E. Reguera ◽  
JF Bertrán ◽  
C. Diaz ◽  
J. Blanco ◽  
S. Rondón
Keyword(s):  
Mixed Valence ◽  
Spectroscopic Studies ◽  
Valence States ◽  
Infrared Spectroscopic

scholarly journals 57Fe-Mössbauer Spectroscopic Studies of a New Series of Mixed-valence Biferrocenium Salts

1988 ◽  
Vol 17 (9) ◽  
pp. 1523-1526 ◽  
Author(s):  
Masahiro Kai ◽  
Motomi Katada ◽  
Hirotoshi Sano
Keyword(s):  
Mixed Valence ◽  
Spectroscopic Studies ◽  
57Fe Mössbauer

Mössbauer spectroscopic studies on mixed-valence states in trinuclear iron carboxylates

1994 ◽  
Vol 84 (1) ◽  
pp. 589-594 ◽  
Author(s):  
M. Yoshida ◽  
T. Nakamoto ◽  
S. Kawata ◽  
M. Katada ◽  
H. Sano
Keyword(s):  
Mixed Valence ◽  
Spectroscopic Studies ◽  
Valence States

Cerium oxide nanomaterial with dual antioxidative scavenging potential: Synthesis and characterization

2021 ◽  
pp. 088532822110134
Author(s):  
Sushant Singh ◽  
Udit Kumar ◽  
David Gittess ◽  
Tamil S Sakthivel ◽  
Balaashwin Babu ◽  
...  
Keyword(s):  
Cerium Oxide ◽  
Biological Systems ◽  
Mixed Valence ◽  
Stable Solution ◽  
Ability To Act ◽  
Valence States ◽  
Transmission Electron ◽  
Efficient Reduction ◽  
Rich Media

Many studies have linked reactive oxygen species (ROS) to various diseases. Biomedical research has therefore sought a way to control and regulate ROS produced in biological systems. In recent years, cerium oxide nanoparticles (nanoceria, CNPs) have been pursued due to their ability to act as regenerative ROS scavengers. In particular, they are shown to have either superoxide dismutase (SOD) or catalase mimetic (CAT) potential depending on the ratio of Ce3+/Ce4+ valence states. Moreover, it has been demonstrated that SOD mimetic activity can be diminished by the presence of phosphate, which can be a problem given that many biological systems operate in a phosphate-rich environment. Herein, we report a CNP formulation with both SOD and catalase mimetic activity that is preserved in a phosphate-rich media. Characterization demonstrated a highly dispersed, stable solution of uniform-sized, spherical-elliptical shaped CNP of 12 ± 2 nm, as determined through dynamic light scattering, zeta potential, and transmission electron microscopy. Mixed valence states of Ce ions were observed via UV/Visible spectroscopy and XPS (Ce3+/Ce4+ > 1) (Ce3+∼ 62%). X-ray diffraction and XPS confirmed the presence of oxygen-deficient cerium oxide (CeO2-x) particles. Finally, the CNP demonstrated very good biocompatibility and efficient reduction of hydrogen peroxide under in-vitro conditions.

scholarly journals Rare-earth (RE) nanolaminates Mo4RE4Al7C3 featuring ferromagnetism and mixed-valence states

2018 ◽  
Vol 2 (11) ◽  
Author(s):  
Q. Tao ◽  
T. Ouisse ◽  
D. Pinek ◽  
O. Chaix-Pluchery ◽  
F. Wilhelm ◽  
...  
Keyword(s):  
Rare Earth ◽  
Mixed Valence ◽  
Valence States
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