Spectroscopic and Kinetic Studies ofArabidopsisthalianaSulfite Oxidase: Nature of the Redox-Active Orbital and Electronic Structure Contributions to Catalysis

2005 ◽  
Vol 127 (47) ◽  
pp. 16567-16577 ◽  
Author(s):  
Craig Hemann ◽  
Brian L. Hood ◽  
Meita Fulton ◽  
Robert Hänsch ◽  
Günter Schwarz ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Kinetic Studies ◽  
Redox Active

The control of the electronic structure of dinuclear copper complexes of redox-active tetrakisguanidine ligands by the environment

2016 ◽  
Vol 45 (40) ◽  
pp. 15828-15839 ◽  
Author(s):  
Sven Wiesner ◽  
Arne Wagner ◽  
Elisabeth Kaifer ◽  
Hans-Jörg Himmel
Keyword(s):  
Electronic Structure ◽  
General Formula ◽  
Electronic Structures ◽  
Copper Complexes ◽  
Dinuclear Copper ◽  
Aromatic Ligand ◽  
Redox Active

The electronic structures of dinuclear copper complexes of the general formula [GFA(CuX2)2], where X = Br or Cl and GFA denotes a redox-active bridging Guanidino-Functionalized Aromatic ligand, were analysed and compared.

Influence of the Redox Active Ligand on the Reactivity and Electronic Structure of a Series of Fe(TIM) Complexes

2010 ◽  
Vol 49 (12) ◽  
pp. 5686-5700 ◽  
Author(s):  
Corinna R. Hess ◽  
Thomas Weyhermüller ◽  
Eckhard Bill ◽  
Karl Wieghardt
Keyword(s):  
Electronic Structure ◽  
Redox Active Ligand ◽  
Active Ligand ◽  
Redox Active

scholarly journals Nitrogenase of Klebsiella pneumoniae. Kinetic studies on the Fe protein involving reduction by sodium dithionite, the binding of MgADP and a conformation change that alters the reactivity of the 4Fe-4S centre

1987 ◽  
Vol 246 (2) ◽  
pp. 455-465 ◽  
Author(s):  
G A Ashby ◽  
R N F Thorneley
Keyword(s):  
Klebsiella Pneumoniae ◽  
Rate Constants ◽  
Protein Conformation ◽  
Kinetic Studies ◽  
Sodium Dithionite ◽  
Conformation Change ◽  
Fe Protein ◽  
Redox Active ◽  
Dithionite Ion ◽  
Kinetics Of

The kinetics of reduction of indigocarmine-dye-oxidized Fe protein of nitrogenase from Klebsiella pneumoniae (Kp2ox) by sodium dithionite in the presence and absence of MgADP were studied by stopped-flow spectrophotometry at 23 degrees C and at pH 7.4. Highly co-operative binding of 2MgADP (composite K greater than 4 × 10(10) M-2) to Kp2ox induced a rapid conformation change which caused the redox-active 4Fe-4S centre to be reduced by SO2-.(formed by the predissociation of dithionite ion) with k = 3 × 10(6) M-1.s-1. This rate constant is at least 30 times lower than that for the reduction of free Kp2ox (k greater than 10(8) M-1.s-1). Two mechanisms have been considered and limits obtained for the rate constants for MgADP binding/dissociation and a protein conformation change. Both mechanisms give rate constants (e.g. MgADP binding 3 × 10(5) less than k less than 3 × 10(6) M-1.s-1 and protein conformation change 6 × 10(2) less than k less than 6 × 10(3) s-1) that are similar to those reported for creatine kinase (EC 2.7.3.2). The kinetics also show that in the catalytic cycle of nitrogenase with sodium dithionite as reductant replacement of 2MgADP by 2MgATP occurs on reduced and not oxidized Kp2. Although the Kp2ox was reduced stoichiometrically by SO2-. and bound two equivalents of MgADP with complete conversion into the less-reactive conformation, it was only 45% active with respect to its ability to effect MgATP-dependent electron transfer to the MoFe protein.

Syntheses and Electronic Structure of Bimetallic Complexes Containing a Flexible Redox-Active Bridging Ligand

2012 ◽  
Vol 52 (2) ◽  
pp. 898-909 ◽  
Author(s):  
Stacey Lindsay ◽  
Siu K. Lo ◽  
Oliver R. Maguire ◽  
Eckhard Bill ◽  
Michael R. Probert ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Bimetallic Complexes ◽  
Bridging Ligand ◽  
Redox Active

Counter-ligand control of the electronic structure in dinuclear copper-tetrakisguanidine complexes

2015 ◽  
Vol 44 (44) ◽  
pp. 19111-19125 ◽  
Author(s):  
Alexandra Ziesak ◽  
Tobias Wesp ◽  
Olaf Hübner ◽  
Elisabeth Kaifer ◽  
Hubert Wadepohl ◽  
...  
Keyword(s):  
Decision Making ◽  
Electronic Structure ◽  
Copper Complex ◽  
Complex Type ◽  
Neutral Complex ◽  
Dinuclear Copper ◽  
Redox Active Ligand ◽  
Active Ligand ◽  
Redox Active

Decision-making counter-ligands: a bridging redox-active ligand in a dinuclear copper complex could be either neutral (complex type [CuII-GFA-CuII]) or dicationic (complex type [CuI-GFA-CuI]), depending on the nature of the counter-ligands X.

scholarly journals Comparative Study of f-Element Electronic Structure across a Series of Multimetallic Actinide and Lanthanoid-Actinide Complexes Possessing Redox-Active Bridging Ligands

2010 ◽  
Vol 49 (4) ◽  
pp. 1995-2007 ◽  
Author(s):  
Eric J. Schelter ◽  
Ruilian Wu ◽  
Jacqueline M. Veauthier ◽  
Eric D. Bauer ◽  
Corwin H. Booth ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Comparative Study ◽  
Bridging Ligands ◽  
Redox Active

Structure, magnetic properties and electronic structure of a nickel(II) complex with redox-active 6-(8-quinolylamino)-2,4-bis(tert-butyl)phenol

Polyhedron ◽  
2016 ◽  
Vol 108 ◽  
pp. 2-7 ◽  
Author(s):  
Molina A.L. Sheepwash ◽  
Alan J. Lough ◽  
Lorenzo Poggini ◽  
Giordano Poneti ◽  
Martin T. Lemaire
Keyword(s):  
Magnetic Properties ◽  
Electronic Structure ◽  
Tert Butyl ◽  
Redox Active ◽  
Butyl Phenol
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