Insight into copper oxidation catalysts: Kinetics, catalytic active species and their deactivation

2005 ◽  
Vol 295 (2) ◽  
pp. 177-184 ◽  
Author(s):  
Petro Lahtinen ◽  
Elina Lankinen ◽  
Markku Leskelä ◽  
Timo Repo
Keyword(s):  
Active Species ◽  
Oxidation Catalysts ◽  
Copper Oxidation ◽  
Insight Into

scholarly journals Pathways towards true catalysts: computational modelling and structural transformations of Zn-polyoxotungstates

2019 ◽  
Vol 48 (35) ◽  
pp. 13293-13304 ◽  
Author(s):  
Lubin Ni ◽  
Robin Güttinger ◽  
C. A. Triana ◽  
Bernhard Spingler ◽  
Kim K. Baldridge ◽  
...  
Keyword(s):  
Noble Metal ◽  
Computational Modelling ◽  
Structural Transformations ◽  
Active Species ◽  
Oxidation Catalysts ◽  
Metal Free ◽  
Insight Into

Comprehensive computational modelling with advanced analytical investigations provides insight into mechanisms and active species of noble metal-free polyoxometalate oxidation catalysts.

scholarly journals Shedding light on the nature of the catalytically active species in photocatalytic reactions using Bi2O3 semiconductor

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Paola Riente ◽  
Mauro Fianchini ◽  
Patricia Llanes ◽  
Miquel A. Pericàs ◽  
Timothy Noël
Keyword(s):  
Experimental Studies ◽  
Heterogeneous Photocatalysis ◽  
Active Species ◽  
Organic Transformations ◽  
Alkyl Bromides ◽  
Catalytically Active ◽  
Visible Light Driven ◽  
Photocatalytic Reactions ◽  
Insight Into ◽  
Photocatalytic Processes

AbstractThe importance of discovering the true catalytically active species involved in photocatalytic systems allows for a better and more general understanding of photocatalytic processes, which eventually may help to improve their efficiency. Bi2O3 has been used as a heterogeneous photocatalyst and is able to catalyze several synthetically important visible-light-driven organic transformations. However, insight into the operative catalyst involved in the photocatalytic process is hitherto missing. Herein, we show through a combination of theoretical and experimental studies that the perceived heterogeneous photocatalysis with Bi2O3 in the presence of alkyl bromides involves a homogeneous BinBrm species, which is the true photocatalyst operative in the reaction. Hence, Bi2O3 can be regarded as a precatalyst which is slowly converted in an active homogeneous photocatalyst. This work can also be of importance to mechanistic studies involving other semiconductor-based photocatalytic processes.

scholarly journals Jump-starting kinesin

2007 ◽  
Vol 176 (1) ◽  
pp. 7-9 ◽  
Author(s):  
David D. Hackney
Keyword(s):  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Active Species ◽  
Light Chains ◽  
Interacting Protein ◽  
Heavy Chains ◽  
Structural Insight ◽  
Conventional Kinesin ◽  
Related Paper ◽  
Insight Into

When it is not actively transporting cargo, conventional Kinesin-1 is present in the cytoplasm in a folded conformation that cannot interact effectively with microtubules (MTs). Two important and largely unexplored aspects of kinesin regulation are how it is converted to an active species when bound to cargo and the related issue of how kinesin discriminates among its many potential cargo molecules. Blasius et al. (see p. 11 of this issue) report that either binding of the cargo linker c-Jun N-terminal kinase–interacting protein 1 (JIP1) to the light chains (LCs) or binding of fasciculation and elongation protein ζ1 (FEZ1) to the heavy chains (HCs) is insufficient for activation but that activation occurs when both are present simultaneously. A related paper by Cai et al. (see p. 51 of this issue) provides structural insight into the conformation of the folded state in the cell obtained by fluorescence resonance energy transfer analysis.

Molecular ruthenium water oxidation catalysts carrying non-innocent ligands: mechanistic insight through structure–activity relationships and quantum chemical calculations

2016 ◽  
Vol 6 (5) ◽  
pp. 1306-1319 ◽  
Author(s):  
Markus D. Kärkäs ◽  
Rong-Zhen Liao ◽  
Tanja M. Laine ◽  
Torbjörn Åkermark ◽  
Shams Ghanem ◽  
...  
Keyword(s):  
Quantum Chemical Calculations ◽  
Water Oxidation ◽  
Quantum Chemical ◽  
Oxidation Catalysis ◽  
Oxidation Catalysts ◽  
Structure Activity Relationships ◽  
Structure Activity ◽  
Mechanistic Insight ◽  
Insight Into

Herein is highlighted how structure–activity relationships can be used to provide mechanistic insight into H2O oxidation catalysis.

scholarly journals Real-time analysis of Pd2(dba)3 activation by phosphine ligands

2017 ◽  
Vol 53 (5) ◽  
pp. 854-856 ◽  
Author(s):  
Eric Janusson ◽  
Harmen S. Zijlstra ◽  
Peter P. T. Nguyen ◽  
Landon MacGillivray ◽  
Julio Martelino ◽  
...  
Keyword(s):  
Real Time ◽  
Active Species ◽  
Phosphine Ligands ◽  
Time Analysis ◽  
Esi Ms ◽  
Real Time Analysis ◽  
Insight Into

Real-time UV-Vis/ESI-MS monitoring of Pd2(dba)3 activation provides insight into active species and the effect of activation protocol on their formation.

scholarly journals Mechanisms of Photoisomerization and Water Oxidation Catalysis of Ruthenium(II) Aquo Complexes

2021 ◽  
Author(s):  
Yuta Tsubonouchi ◽  
Eman A. Mohamed ◽  
Zaki N. Zahran ◽  
Masayuki Yagi
Keyword(s):  
Physicochemical Properties ◽  
Water Oxidation ◽  
Recent Progress ◽  
Artificial Photosynthesis ◽  
Ruthenium Complexes ◽  
Oxidation Catalysis ◽  
Oxidation Catalysts ◽  
Water Oxidation Catalysis ◽  
Molecular Catalysts ◽  
Insight Into

Polypyridyl ruthenium(II) complexes have been widely researched as promising functional molecules. We have found unique photoisomerization reactions of polypyridyl ruthenium(II) aquo complexes. Recently we have attempted to provide insight into the mechanism of the photoisomerization of the complexes and distinguish between the distal−/proximal-isomers in their physicochemical properties and functions. Moreover, polypyridyl ruthenium(II) aquo complexes have been intensively studied as active water oxidation catalysts (WOCs) which are indispensable for artificial photosynthesis. The catalytic aspect and mechanism of water oxidation by the distal-/proximal-isomers of polypyridyl ruthenium(II) aquo complexes have been investigated to provide the guided thought to develop more efficient molecular catalysts for water oxidation. The recent progress on the photoisomerization and water oxidation of polypyridyl ruthenium(II) aquo complexes in our group are reviewed to understand the properties and functions of ruthenium complexes.

Surface transformations of copper oxidation catalysts

1980 ◽  
Vol 13 (2) ◽  
pp. 161-165 ◽  
Author(s):  
J. Haber ◽  
J. Stoch ◽  
T. Wiltowski
Keyword(s):  
Oxidation Catalysts ◽  
Copper Oxidation
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