scholarly journals Electrochemical Studies of Tris(cyclopentadienyl) Thorium and Uranium Complexes in the +2, +3, and +4 Oxidation States

2021 ◽  
Author(s):  
Justin C. Wedal ◽  
Jeffrey M Barlow ◽  
Joseph W Ziller ◽  
Jenny Y Yang ◽  
William J Evans
Keyword(s):  
Electrochemical Measurements ◽  
Oxidation States ◽  
Electrochemical Studies ◽  
Reduction Potentials ◽  
Uranium Compounds ◽  
Uranium Complexes

Electrochemical measurements on tris(cyclopentadienyl) thorium and uranium compounds in the +2, +3, and +4 oxidation states are reported with C5H3(SiMe3)2, C5H4SiMe3, and C5Me4H ligands. The reduction potentials for both U and...

scholarly journals Density functional theory (DFT) calculations of VI/V reduction potentials of uranyl coordination complexes in non-aqueous solutions

2019 ◽  
Vol 21 (6) ◽  
pp. 3227-3241 ◽  
Author(s):  
Krishnamoorthy Arumugam ◽  
Neil A. Burton
Keyword(s):  
Density Functional Theory ◽  
Dft Calculations ◽  
Aqueous Solutions ◽  
Density Functional ◽  
Coordination Complexes ◽  
Dft Study ◽  
Redox Behavior ◽  
Functional Theory ◽  
Reduction Potentials ◽  
Uranium Complexes

Of particular interest within the +6 uranium complexes is the linear uranyl(vi) cation and it forms numerous coordination complexes in solution and exhibits incongruent redox behavior depending on coordinating ligands. This DFT study predicts VI/V reduction potentials of a range of uranyl(vi) complexes in non-aqueous solutions within ∼0.10−0.20 eV of experiment.

Synthesis and hydrolysis of gas-phase lanthanide and actinide oxide nitrate complexes: a correspondence to trivalent metal ion redox potentials and ionization energies

2015 ◽  
Vol 17 (15) ◽  
pp. 9942-9950 ◽  
Author(s):  
Ana F. Lucena ◽  
Célia Lourenço ◽  
Maria C. Michelini ◽  
Philip X. Rutkowski ◽  
José M. Carretas ◽  
...  
Keyword(s):  
Gas Phase ◽  
Metal Ion ◽  
Oxidation States ◽  
Redox Potentials ◽  
Trivalent Metal ◽  
Ionization Energies ◽  
Reduction Potentials ◽  
Hydrolysis Of ◽  
Nitrate Complexes

Gas-phase hydrolysis of lanthanide/actinide MO3(NO3)3−ions relates to the stabilities of the MIVoxidation states, which correlate with IV/III solution reduction potentials and 4th ionization energies.

The Structure−Function Relationship and Reduction Potentials of High Oxidation States of Myoglobin and Peroxidase†

Biochemistry ◽  
1996 ◽  
Vol 35 (7) ◽  
pp. 2413-2420 ◽  
Author(s):  
Bing He ◽  
Robert Sinclair ◽  
Bruce R. Copeland ◽  
Ryu Makino ◽  
L. S. Powers ◽  
...  
Keyword(s):  
Structure Function ◽  
Oxidation States ◽  
Reduction Potentials ◽  
High Oxidation ◽  
Structure Function Relationship ◽  
Function Relationship

XPS and Electrochemical Studies on Tungsten-Oxidizer Interaction in Chemical Mechanical Polishing

1999 ◽  
Vol 566 ◽  
Author(s):  
Dnyanesh Tamboli ◽  
Sudipta Seal ◽  
Vimal Desai
Keyword(s):  
Photoelectron Spectroscopy ◽  
Chemical Mechanical Polishing ◽  
Material Removal ◽  
Electrochemical Measurements ◽  
Electrochemical Studies ◽  
Removal Mechanism ◽  
Tungsten Oxides ◽  
X Ray ◽  
Static Solutions

Electrochemical interaction between the oxidizer and the metal is believed to play a key role in material removal in tungsten CMP. In this study, we use X-ray Photoelectron Spectroscopy (XPS) in conjunction with electrochemical measurements in both in-situ polishing conditions as well as in static solutions, to identify the passivation and dissolution modes of tungsten. Dissolution of tungsten oxides was found to be the primary non-mechanical tungsten removal mechanism in CMP.

scholarly journals Correcting Frost Diagram Misconceptions Using Interactive Frost Diagrams

2021 ◽  
Author(s):  
Kaitlyn Dutton ◽  
Mark C. Lipke
Keyword(s):  
Oxidation State ◽  
Thermodynamic Stability ◽  
Redox Conditions ◽  
Oxidation States ◽  
Relative Stabilities ◽  
Conditional Dependence ◽  
Reduction Potentials ◽  
Interactive Diagrams

<p>Frost diagrams provide convenient illustrations of the aqueous reduction potentials and thermodynamic tendencies of different oxidation states of an element. Undergraduate textbooks often describe the lowest point on a Frost diagram as the most stable oxidation state of the element, but this interpretation is incorrect because the thermodynamic stability of each oxidation state depends on the specific redox conditions in solution (i.e., the potential applied by the environment or an electrode). Further confusion is caused by the widespread use of different, contradictory conventions for labeling the y-axis of these diagrams as either n<i>E</i>° or −n<i>E</i>°, among other possibilities. To aid in discussing and correcting these common mistakes, we introduce a series of interactive Frost diagrams that illustrate the conditional dependence of the relative stabilities of each oxidation state of an element. We include instructor’s notes for using these interactive diagrams and a written activity for students to complete using these diagrams.</p>

scholarly journals Photocatalytic Deoxygenation of N–O bonds with Rhenium Complexes: from the Reduction of Nitrous Oxide to Pyridine N-Oxides

2021 ◽  
Author(s):  
Marianne Kjellberg ◽  
Alexia Ohleier ◽  
Pierre Thuéry ◽  
Emmanuel Nicolas ◽  
Lucile Anthore-Dalion ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Nitrogen Oxides ◽  
Oxidation States ◽  
Rhenium Complexes ◽  
Reduction Potentials

The accumulation of nitrogen oxides in the environment calls for new pathways to interconvert the various oxidation states of nitrogen, and especially their reduction. The large spectrum of reduction potentials...

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