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...

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 ◽  
Greenhouse Gas ◽  
High Energy ◽  
Oxidation States ◽  
Ambient Conditions ◽  
Reduction Potentials ◽  
Rhenium Complex ◽  
Functionalized Pyridine ◽  
General Systems

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 covered by nitrogen oxides makes it however difficult to find general systems capable of efficiently reducing various N-oxides. Here photocatalysis unlocks high energy species able to both circumvent the inherent low reactivity of the greenhouse gas and oxidant N<sub>2</sub>O (E°(N<sub>2</sub>O/N<sub>2</sub>) = +1.77 V vs. SHE), and reduce pyridine N-oxides (E<sub>1/2</sub>(pyridine N-oxide/pyridine) = –1.04 V vs. SHE). The rhenium complex [Re(4,4’-tBu-bpy)(CO)<sub>3</sub>Cl] proved to be efficient to perform both reactions under ambient conditions, enabling the deoxygenation of N<sub>2</sub>O as well as synthetically relevant and functionalized pyridine N-oxides.<br>

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 ◽  
Greenhouse Gas ◽  
High Energy ◽  
Oxidation States ◽  
Ambient Conditions ◽  
Reduction Potentials ◽  
Rhenium Complex ◽  
Functionalized Pyridine ◽  
General Systems

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 covered by nitrogen oxides makes it however difficult to find general systems capable of efficiently reducing various N-oxides. Here photocatalysis unlocks high energy species able to both circumvent the inherent low reactivity of the greenhouse gas and oxidant N<sub>2</sub>O (E°(N<sub>2</sub>O/N<sub>2</sub>) = +1.77 V vs. SHE), and reduce pyridine N-oxides (E<sub>1/2</sub>(pyridine N-oxide/pyridine) = –1.04 V vs. SHE). The rhenium complex [Re(4,4’-tBu-bpy)(CO)<sub>3</sub>Cl] proved to be efficient to perform both reactions under ambient conditions, enabling the deoxygenation of N<sub>2</sub>O as well as synthetically relevant and functionalized pyridine N-oxides.<br>

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

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>

Differential kinetics of nitrogen oxides reduction leads to elevated nitrous oxide production by a nitrite fed granular denitrifying EBPR bioreactor

2020 ◽  
Vol 6 (4) ◽  
pp. 1028-1043 ◽  
Author(s):  
Han Gao ◽  
Xiaotian Zhao ◽  
Lei Zhou ◽  
Fabrizio Sabba ◽  
George F. Wells
Keyword(s):  
Nitrous Oxide ◽  
Nitrogen Oxides ◽  
Greenhouse Gas ◽  
P Uptake ◽  
Oxide Production ◽  
Slow Kinetics ◽  
Nitrous Oxide Production ◽  
Nitrogen Oxides Reduction ◽  
Kinetics Of

Batch kinetic assays of DPAO-enriched biomass reveal elevated kinetics when nitrite is supplied for P uptake, but extremely slow kinetics for reduction of the potent greenhouse gas nitrous oxide.

Reclaim of Nitrous Gas Produced in the Production of Adipate

2014 ◽  
Vol 1079-1080 ◽  
pp. 79-82
Author(s):  
Li Jun Xiang ◽  
Shuang Kou Chen
Keyword(s):  
Nitrous Oxide ◽  
Nitric Acid ◽  
Nitrogen Oxides ◽  
Production Process ◽  
Economic Value ◽  
Gas Composition ◽  
Environmental Significance ◽  
Acid Gas ◽  
Waste Gas

Reclaim of large amounts of nitrogen oxides wasstudied which was produced in the production process of adipate in ChongqingChemical Industry Co. Ltd. The waste gas first was cooled, then into theabsorption tower through the compressor, most of the nitrous gas was absorbedout in the form of nitric acid after treated by three absorption towers. Weresearched gas composition at the gateway of recycling equipment by gaschromatograph, and which showed that all NO, NO2and nitric acid gas werealmost absorbed out, while N2O without being absorbed was eventuallyemissions into the atmosphere at the allowed concentration range. The research resultsshowed that could recycle 33,000 tons of nitric acid and saved 60 million yuan RMBfor the company every year after treating by the recycling equipment, whichfully embodied the economic value and environmental significance, and put out anew target of treating nitrous oxide gas.

scholarly journals Nitrite Reductase of Nitrosomonas europaea Is Not Essential for Production of Gaseous Nitrogen Oxides and Confers Tolerance to Nitrite

2002 ◽  
Vol 184 (9) ◽  
pp. 2557-2560 ◽  
Author(s):  
Hubertus J. E. Beaumont ◽  
Norman G. Hommes ◽  
Luis A. Sayavedra-Soto ◽  
Daniel J. Arp ◽  
David M. Arciero ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Nitrous Oxide ◽  
Nitrogen Oxides ◽  
Nitrite Reductase ◽  
Nitrosomonas Europaea ◽  
Wild Type ◽  
Gaseous Nitrogen ◽  
Cell Extracts

ABSTRACT A gene that encodes a periplasmic copper-type nitrite reductase (NirK) was identified in Nitrosomonas europaea. Disruption of this gene resulted in the disappearance of Nir activity in cell extracts. The nitrite tolerance of NirK-deficient cells was lower than that of wild-type cells. Unexpectedly, NirK-deficient cells still produced nitric oxide (NO) and nitrous oxide (N2O), the latter in greater amounts than that of wild-type cells. This demonstrates that NirK is not essential for the production of NO and N2O by N. europaea. Inactivation of the putative fnr gene showed that Fnr is not essential for the expression of nirK.

scholarly journals The Catalytic Decomposition of Nitrous Oxide and the NO + CO Reaction over Ni/Cu Dilute and Single Atom Alloy Surfaces: First-principles Microkinetic Modelling

2021 ◽  
Author(s):  
Konstantinos G. Papanikolaou ◽  
Michail Stamatakis
Keyword(s):  
Nitrous Oxide ◽  
Nitrogen Oxides ◽  
First Principles ◽  
Catalytic Decomposition ◽  
Platinum Group Metal ◽  
Single Atom ◽  
Environmental Challenges ◽  
Metal Free ◽  
Decomposition Of Nitrous Oxide ◽  
Single Atom Alloy

The development of platinum group metal-free (PGM-free) catalysts, which can efficiently reduce pollution-causing emissions, is an important task for overcoming major environmental challenges. In particular, nitrogen oxides (NOx) are major...

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