scholarly journals Electron bifurcation: progress and grand challenges

2019 ◽  
Vol 55 (79) ◽  
pp. 11823-11832 ◽  
Author(s):  
Jonathon L. Yuly ◽  
Carolyn E. Lubner ◽  
Peng Zhang ◽  
David N. Beratan ◽  
John W. Peters
Keyword(s):  
Electron Donor ◽  
Electron Acceptors ◽  
Grand Challenges

Electron bifurcation moves electrons from a two-electron donor to reduce two spatially separated one-electron acceptors.

Electron Donating, Acid-Base and Catalytic Properties of Perovskite-Type Mixed Oxides of Rare Earths

1995 ◽  
Vol 60 (6) ◽  
pp. 977-982
Author(s):  
S. Sugunan ◽  
V. Meera
Keyword(s):  
Catalytic Activity ◽  
Electron Donor ◽  
Rare Earths ◽  
Electron Affinity ◽  
Mixed Oxides ◽  
Catalytic Properties ◽  
Surface Acidity ◽  
Electron Acceptors ◽  
Acid Base ◽  
Perovskite Type

The electron donor properties of perovskite-type mixed oxides (LaFeO3, PrFeO3, SmFeO3, LaCoO3, PrCoO3, SmCoO3, LaNiO3, PrNiO3 and SmNiO3) were studied based on the adsorption of electron acceptors exhibiting different electron affinity viz. 7,7,8,8-tetracyanoquinodimethane, 2,3,5,6-tetrachloro-1,4-benzoquinone, p-dinitrobenzene, and m-dinitrobenzene. The surface acidity/basicity of the oxides was determined using a set of Hammett indicators. The data were correlated with the catalytic activity of the oxides for the reduction of cyclohexanone with 2-propanol.

Evaluating Thiophene Electron-Donor Layers for the Rapid Assessment of Boron Subphthalocyanines as Electron Acceptors in Organic Photovoltaics: Solution or Vacuum Deposition?

ChemPhysChem ◽  
2015 ◽  
Vol 16 (6) ◽  
pp. 1245-1250 ◽  
Author(s):  
David S. Josey ◽  
Jeffrey S. Castrucci ◽  
Jeremy D. Dang ◽  
Benoît H. Lessard ◽  
Timothy P. Bender
Keyword(s):  
Electron Donor ◽  
Organic Photovoltaics ◽  
Rapid Assessment ◽  
Electron Acceptors ◽  
Vacuum Deposition

scholarly journals Uranium(VI) Reduction by Anaeromyxobacter dehalogenans Strain 2CP-C

2006 ◽  
Vol 72 (5) ◽  
pp. 3608-3614 ◽  
Author(s):  
Qingzhong Wu ◽  
Robert A. Sanford ◽  
Frank E. L�ffler
Keyword(s):  
Electron Donor ◽  
Ferric Iron ◽  
Model Organism ◽  
Complex Interaction ◽  
Cell Suspensions ◽  
Electron Acceptors ◽  
C Cells ◽  
Inhibitory Effects ◽  
Halogenated Compounds ◽  
Metabolic Versatility

ABSTRACT Previous studies demonstrated growth of Anaeromyxobacter dehalogenans strain 2CP-C with acetate or hydrogen as the electron donor and Fe(III), nitrate, nitrite, fumarate, oxygen, or ortho-substituted halophenols as electron acceptors. In this study, we explored and characterized U(VI) reduction by strain 2CP-C. Cell suspensions of fumarate-grown 2CP-C cells reduced U(VI) to U(IV). More-detailed growth studies demonstrated that hydrogen was the required electron donor for U(VI) reduction and could not be replaced by acetate. The addition of nitrate to U(VI)-reducing cultures resulted in a transitory increase in U(VI) concentration, apparently caused by the reoxidation of reduced U(IV), but U(VI) reduction resumed following the consumption of N-oxyanions. Inhibition of U(VI) reduction occurred in cultures amended with Fe(III) citrate, or citrate. In the presence of amorphous Fe(III) oxide, U(VI) reduction proceeded to completion but the U(VI) reduction rates decreased threefold compared to control cultures. Fumarate and 2-chlorophenol had no inhibitory effects on U(VI) reduction, and both electron acceptors were consumed concomitantly with U(VI). Since cocontaminants (e.g., nitrate, halogenated compounds) and bioavailable ferric iron are often encountered at uranium-impacted sites, the metabolic versatility makes Anaeromyxobacter dehalogenans a promising model organism for studying the complex interaction of multiple electron acceptors in U(VI) reduction and immobilization.

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