ChemInform Abstract: An Improved One-Step Method to Prepare Some Diaza-Crown Ethers and the Cation Complexation Properties of 4,10-Diaza-18-Crown-6 with Two Transition Metal Ions.

ChemInform ◽  
2010 ◽  
Vol 26 (30) ◽  
pp. no-no
Author(s):  
K. E. KRAKOWIAK ◽  
G. E. MAAS ◽  
J. S. BRADSHAW ◽  
J. K. HATHAWAY ◽  
R. M. IZATT
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Crown Ethers ◽  
Transition Metal Ions ◽  
Step Method ◽  
Cation Complexation ◽  
One Step ◽  
Diaza Crown Ethers

Impact of lithium excess on the structural and electrochemical properties of the LiNi0.5Mn1.5O4high-voltage cathode material

2015 ◽  
Vol 3 (40) ◽  
pp. 20103-20107 ◽  
Author(s):  
Yu-Feng Deng ◽  
Shi-Xi Zhao ◽  
Peng-Yuan Zhai ◽  
Guozhong Cao ◽  
Ce-Wen Nan
Keyword(s):  
Transition Metal ◽  
Cathode Material ◽  
Metal Ions ◽  
Phase Change ◽  
Electrochemical Properties ◽  
Transition Metal Ions ◽  
Octahedral Sites ◽  
Tetrahedral Sites ◽  
One Step ◽  
Co Precipitation

Li1+xNi0.5−xMn1.5O4, madeviaa novel one-step co-precipitation route, undergoes a disordered-to-ordered phase change. Transition metal ions in tetrahedral sites could influence the performance more than the cationic ordering in octahedral sites does.

HREM Study of electron-induced surface radiation damage in ReO3

1991 ◽  
Vol 49 ◽  
pp. 636-637
Author(s):  
R. Ai ◽  
H.-J. Fan ◽  
L. D. Marks
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Metal Oxides ◽  
Electron Irradiation ◽  
Transition Metal Oxides ◽  
Carbon Film ◽  
Transition Metal Ions ◽  
Surface Radiation ◽  
Valence Transition ◽  
Electron Microscopes

It has been known for a long time that electron irradiation induces damage in maximal valence transition metal oxides such as TiO2, V2O5, and WO3, of which transition metal ions have an empty d-shell. This type of damage is excited by electronic transition and can be explained by the Knoteck-Feibelman mechanism (K-F mechanism). Although the K-F mechanism predicts that no damage should occur in transition metal oxides of which the transition metal ions have a partially filled d-shell, namely submaximal valence transition metal oxides, our recent study on ReO3 shows that submaximal valence transition metal oxides undergo damage during electron irradiation.ReO3 has a nearly cubic structure and contains a single unit in its cell: a = 3.73 Å, and α = 89°34'. TEM specimens were prepared by depositing dry powders onto a holey carbon film supported on a copper grid. Specimens were examined in Hitachi H-9000 and UHV H-9000 electron microscopes both operated at 300 keV accelerating voltage. The electron beam flux was maintained at about 10 A/cm2 during the observation.

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