scholarly journals High-Valent Iron in Biomimetic Alkane Oxidation Catalysis

2015 ◽  
pp. 145-171 ◽  
Author(s):  
Michaela Grau ◽  
George J. P. Britovsek
Keyword(s):  
Oxidation Catalysis ◽  
Alkane Oxidation ◽  
High Valent

ChemInform Abstract: High-Valent Iron in Biomimetic Alkane Oxidation Catalysis

ChemInform ◽  
2016 ◽  
Vol 47 (41) ◽  
Author(s):  
Michaela Grau ◽  
George J. P. Britovsek
Keyword(s):  
Oxidation Catalysis ◽  
Alkane Oxidation ◽  
High Valent

scholarly journals How to control selectivity in alkane oxidation?

2019 ◽  
Vol 10 (8) ◽  
pp. 2429-2443 ◽  
Author(s):  
Xuan Li ◽  
Detre Teschner ◽  
Verena Streibel ◽  
Thomas Lunkenbein ◽  
Liudmyla Masliuk ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Catalytic Performance ◽  
Oxidation Catalysis ◽  
Bulk Crystal ◽  
Oxidation Catalyst ◽  
Alkane Oxidation

The bulk crystal structure of an oxidation catalyst as the most popular descriptor in oxidation catalysis is not solely responsible for catalytic performance.

scholarly journals Molecular water oxidation catalysis by zwitterionic carboxylate bridge-functionalized bis-NHC iridium complexes

2019 ◽  
Vol 9 (6) ◽  
pp. 1437-1450 ◽  
Author(s):  
Raquel Puerta-Oteo ◽  
M. Victoria Jiménez ◽  
Jesús J. Pérez-Torrente
Keyword(s):  
Water Oxidation ◽  
Oxidation Catalysis ◽  
Molecular Water ◽  
Iridium Complexes ◽  
Intermediate Species ◽  
Carboxylate Bridge ◽  
Water Oxidation Catalysis ◽  
High Valent

Carboxylate functionalized bis-NHC ligands allow for the stabilization of high-valent iridium intermediate species involved in homogeneous water oxidation catalysis.

A strong-field pentadentate ligand in iron-based alkane oxidation catalysis and implications for iron(iv) oxo intermediates

2013 ◽  
Vol 3 (4) ◽  
pp. 1116 ◽  
Author(s):  
Emma Wong ◽  
Jonathan Jeck ◽  
Michaela Grau ◽  
Andrew J. P. White ◽  
George J. P. Britovsek
Keyword(s):  
Strong Field ◽  
Oxidation Catalysis ◽  
Alkane Oxidation ◽  
Iron Based ◽  
Pentadentate Ligand

scholarly journals Spectroscopic capture of a low-spin Mn(IV)-oxo species in Ni–Mn3O4 nanoparticles during water oxidation catalysis

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Sunghak Park ◽  
Kyoungsuk Jin ◽  
Hyung Kyu Lim ◽  
Jin Kim ◽  
Kang Hee Cho ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Heterogeneous Catalysts ◽  
Spectroscopic Characterization ◽  
Transition Metal Catalysts ◽  
Oxidation Catalysis ◽  
Ligand Field ◽  
Intermediate Species ◽  
Spin Configuration ◽  
High Valent

Abstract High-valent metal-oxo moieties have been implicated as key intermediates preceding various oxidation processes. The critical O–O bond formation step in the Kok cycle that is presumed to generate molecular oxygen occurs through the high-valent Mn-oxo species of the water oxidation complex, i.e., the Mn4Ca cluster in photosystem II. Here, we report the spectroscopic characterization of new intermediates during the water oxidation reaction of manganese-based heterogeneous catalysts and assign them as low-spin Mn(IV)-oxo species. Recently, the effects of the spin state in transition metal catalysts on catalytic reactivity have been intensely studied; however, no detailed characterization of a low-spin Mn(IV)-oxo intermediate species currently exists. We demonstrate that a low-spin configuration of Mn(IV), S = 1/2, is stably present in a heterogeneous electrocatalyst of Ni-doped monodisperse 10-nm Mn3O4 nanoparticles via oxo-ligand field engineering. An unprecedented signal (g = 1.83) is found to evolve in the electron paramagnetic resonance spectrum during the stepwise transition from the Jahn–Teller-distorted Mn(III). In-situ Raman analysis directly provides the evidence for Mn(IV)-oxo species as the active intermediate species. Computational analysis confirmed that the substituted nickel species induces the formation of a z-axis-compressed octahedral C4v crystal field that stabilizes the low-spin Mn(IV)-oxo intermediates.

ChemInform Abstract: High Valent FeIVChemistry in Sustainable Oxidation Catalysis

ChemInform ◽  
2015 ◽  
Vol 46 (24) ◽  
pp. no-no
Author(s):  
Preeti P. Chandrachud ◽  
David M. Jenkins
Keyword(s):  
Oxidation Catalysis ◽  
High Valent
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