scholarly journals Structure and reactivity in neutral organic electron donors derived from 4-dimethylaminopyridine

2010 ◽  
Vol 6 ◽  
Author(s):  
Jean Garnier ◽  
Alan R Kennedy ◽  
Leonard E A Berlouis ◽  
Andrew T Turner ◽  
John A Murphy
Keyword(s):  
Redox Properties ◽  
Electron Donors ◽  
Redox Potentials ◽  
Polymethylene Chain ◽  
Organic Electron ◽  
Two Parameters ◽  
Bridge Length ◽  
Molecular Skeleton

The effects on the redox properties of modifying the molecular skeleton of neutral bis-2-(4-dimethylamino)pyridinylidene electron donors, derived from 4-dimethylaminopyridine (4-DMAP), have been explored, by varying two parameters: (i) the length of a polymethylene chain linking the two pyridine-derived rings and (ii) the nature of the nitrogen substituents on the 4 and 4′ positions of the precursor pyridines. Restricting the bridge length to two methylene units significantly altered the redox profile, while changes in the nitrogen-substituents at the 4 and 4′ positions led to only slight changes in the redox potentials.

Switching from single to simultaneous free radical and anionic polymerization with enamine‐based organic electron donors

2021 ◽  
Author(s):  
Yuxi Zhao ◽  
Marion Rollet ◽  
Laurence Charles ◽  
Gabriel Canard ◽  
Didier Gigmes ◽  
...  
Keyword(s):  
Free Radical ◽  
Anionic Polymerization ◽  
Electron Donors ◽  
Organic Electron

β-Tetrabromo-meso-tetrakis(4′-substituted phenyl)porphyrins: synthesis and electrochemical redox properties

2011 ◽  
Vol 15 (09n10) ◽  
pp. 883-889 ◽  
Author(s):  
P. Bhyrappa ◽  
V. Velkannan
Keyword(s):  
Linear Relationship ◽  
Redox Properties ◽  
Redox Potentials ◽  
Electrochemical Redox ◽  
Hammett Parameter

A series of 2,3,12,13-tetrabromo-5,10,15,20-tetrakis(4′-substituted phenyl)porphyrins, H2 T(4′-R Ph) PBr4 ( R = OCH3 , t-butyl, H and CO2CH3 ) and their metal ( Co(II) , Cu(II) , and Zn(II) ) complexes were synthesized and their electrochemical redox properties were explored. The plot of E1/2vs. the Hammett parameter (σp) of the substituents (R) follow a fairly linear relationship for the ring centered redox potentials.

scholarly journals Base-Free Generation of Organic Electron Donors from Air-Stable Precursors

2018 ◽  
Vol 57 (12) ◽  
pp. 3148-3153 ◽  
Author(s):  
Guillaume Tintori ◽  
Pierre Nabokoff ◽  
Ruqaya Buhaibeh ◽  
David Bergé-Lefranc ◽  
Sébastien Redon ◽  
...  
Keyword(s):  
Electron Donors ◽  
Organic Electron ◽  
Free Generation

Chemical reduction of Ag+ to Ag employing organic electron donors: evaluation of the effect of Ag+-mediated cytosine–cytosine base pairing on the aggregation of Ag nanoparticles

2021 ◽  
Author(s):  
Takenori Dairaku ◽  
Rika Kawai ◽  
Kanako Nozawa-Kumada ◽  
Kentaro Yoshida ◽  
Tetsuya Ono ◽  
...  
Keyword(s):  
Ag Nanoparticles ◽  
Chemical Reduction ◽  
Total Concentration ◽  
Electron Donors ◽  
Base Pairing ◽  
Reduction Activity ◽  
Organic Electron

The formation of C–Ag+–C base pairing inhibits the aggregation of AgNPs in solution. The total concentration of the obtained AgNP solution can be controlled by the degree of the reduction activity of the organic electron donors.

scholarly journals 1,2,4,5‐Tetrakis(tetramethylguanidino)‐3,6‐diethynyl‐benzenes: Fluorescent Probes, Redox‐Active Ligands and Strong Organic Electron Donors

2020 ◽  
Vol 26 (45) ◽  
pp. 10336-10347
Author(s):  
Conrad Wagner ◽  
Franka Kreis ◽  
Dennis Popp ◽  
Olaf Hübner ◽  
Elisabeth Kaifer ◽  
...  
Keyword(s):  
Fluorescent Probes ◽  
Electron Donors ◽  
Redox Active Ligands ◽  
Redox Active ◽  
Organic Electron

A Critical Evaluation of the Redox Properties of Uranium, Neptunium and Plutonium Ions in Acidic Aqueous Solutions

1999 ◽  
Vol 71 (9) ◽  
pp. 1771-1807 ◽  
Author(s):  
Sorin Kihara ◽  
Zenko Yoshida ◽  
Hisao Aoyagi ◽  
Kohji Maeda ◽  
Osamu Shirai ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Redox Reactions ◽  
Critical Evaluation ◽  
Redox Properties ◽  
Redox Processes ◽  
Redox Potentials ◽  
Electrode Processes ◽  
Reversible Redox ◽  
Reduction Mechanisms ◽  
Current Potential

Standard redox potentials, E0s, and redox processes of U, Np and Pu ions in acidic aqueous solutions are reviewed and evaluated critically. The E0sof reversible redox processes, MO22+/MO2+ and M4+/M3+ (M: U, Np or Pu) adopted are those proposed mainly by Riglet et al. on the basis of the precise correction of formal potentials, E0's, according to the improved theoretical approach to estimate the activity coefficient. Electrode processes of the U, Np and Pu ions are discussed in terms of current-potential curves, measured so far by polarography, voltammetry or flow coulometry. Special attention is payed to the irreversible MO2+/M4+ reactions. Disproportionation reactions of MO2+ are also discussed. New substances are introduced as intermediates during reductions of MO2+ to M4+ or disproportionations of MO2+.CONTENTSIntroductionStandard redox potentials for uranium, neptunium and plutonium ions in acidic aqueous solutions2.1 Evaluation of E0 from E0' determined by electrochemical measurements2.2 Temperature dependence of E0Redox reactions of uranium, neptunium and plutonium in acidic aqueous solutions investigated by polarography or voltammetry3.1 Uranium3.2 Neptunium3.3 Plutonium3.4 Disproportionation of NpO2+, PuO2+, Np4+ and Pu4+3.5 Reduction of MO2+ and reduction intermediatesRedox reactions of uranium, neptunium and plutonium in acidic aqueous solutions investigated by flow coulometry4.1 Electrode processes of the uranium, neptunium and plutonium ions investigated by flow coulometry at the column electrode at the column electrode4.2 Disproportionation of MO2+ during the electrolysis by flow coulometry4.3 Reduction mechanisms of MO2+ (M = Np or Pu) and reduction intermediates investigated by flow coulometryConclusionsList of abbreviationsAppendixReferences

scholarly journals Pushing the Limits of Neutral Organic Electron Donors: A Tetra(iminophosphorano)-Substituted Bispyridinylidene

2015 ◽  
Vol 54 (38) ◽  
pp. 11236-11239 ◽  
Author(s):  
Samuel S. Hanson ◽  
Eswararao Doni ◽  
Kyle T. Traboulsee ◽  
Graeme Coulthard ◽  
John A. Murphy ◽  
...  
Keyword(s):  
Electron Donors ◽  
Organic Electron

scholarly journals Dual Roles for Potassium Hydride in Haloarene Reduction: CSNAr and Single Electron Transfer Reduction via Organic Electron Donors Formed in Benzene

2018 ◽  
Vol 140 (36) ◽  
pp. 11510-11518 ◽  
Author(s):  
Joshua P. Barham ◽  
Samuel E. Dalton ◽  
Mark Allison ◽  
Giuseppe Nocera ◽  
Allan Young ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Electron Donors ◽  
Single Electron ◽  
Single Electron Transfer ◽  
Dual Roles ◽  
Organic Electron ◽  
Potassium Hydride
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