scholarly journals Ligand field-actuated redox-activity of acetylacetonate

2020 ◽  
Vol 11 (31) ◽  
pp. 8267-8272 ◽  
Author(s):  
Morten Gotthold Vinum ◽  
Laura Voigt ◽  
Steen H. Hansen ◽  
Colby Bell ◽  
Kensha Marie Clark ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Redox Activity ◽  
Ligand Field ◽  
Reversible Electron Transfer

Tailoring the chemical surroundings of chromium(ii) allows reversible electron-transfer to the ubiquitous, purportedly redox-inactive acetylacetonate.

Reversible Electron Transfer Coupled to Spin Crossover in an Iron Coordination Salt in the Solid State

2008 ◽  
Vol 120 (7) ◽  
pp. 1248-1251 ◽  
Author(s):  
Marat M. Khusniyarov ◽  
Thomas Weyhermüller ◽  
Eckhard Bill ◽  
Karl Wieghardt
Keyword(s):  
Electron Transfer ◽  
Solid State ◽  
Spin Crossover ◽  
Reversible Electron Transfer ◽  
Iron Coordination

scholarly journals Non-triangular potential sweep cyclic voltammetry of reversible electron transfer: Experiment meets theory

2018 ◽  
Vol 815 ◽  
pp. 24-29 ◽  
Author(s):  
Hatem M.A. Amin ◽  
Yuki Uchida ◽  
Christopher Batchelor-McAuley ◽  
Enno Kätelhön ◽  
Richard G. Compton
Keyword(s):  
Electron Transfer ◽  
Cyclic Voltammetry ◽  
Transfer Experiment ◽  
Potential Sweep ◽  
Reversible Electron Transfer

scholarly journals Non-Proteinaceous Complexes III and IV Mimicking Electron Transfer in the Mitochondrial Respiratory Chain

2020 ◽  
Author(s):  
Iago Modenez ◽  
Lucyano Macedo ◽  
Antonio F. A. A. Melo ◽  
Andressa R. Pereira ◽  
Osvaldo Novais Oliveira Junior ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Cell Membrane ◽  
Mitochondrial Respiratory Chain ◽  
Redox Activity ◽  
Magnetic Iron Oxide Nanoparticles ◽  
Blodgett Film ◽  
Langmuir Blodgett ◽  
Nanoparticle Interactions ◽  
Nanostructured Systems ◽  
Cell Membrane Model

<div><div><div><p>Synthetic biology pursues the understanding of biological processes and their possible mimicry with artificial bioinspired materials. We explore the redox properties of magnetic iron oxide nanoparticles to mimic the redox activity of complexes III and IV towards cytochrome c. We demonstrate that these nanoparticles, incorporated as non-proteinaceous complexes III and IV in a mitochondrial cell membrane model, catalyze electron transfer similarly to natural complexes. The associated molecular mechanism was experimentally proven in solution and in a Langmuir- Blodgett film; the protein-nanoparticle interactions are governed mainly by electrostatic forces, followed by electron transfer between the iron sites of the nanoparticles and the heme group. This work presents the first experimental demonstration that inorganic nanostructured systems may behave as proteins in the cell membrane.</p></div></div></div>

Reversible electron transfer in photochemistry and electrochemistry

2001 ◽  
Vol 115 (6) ◽  
pp. 2652-2663 ◽  
Author(s):  
A. I. Burshtein ◽  
A. A. Neufeld ◽  
K. L. Ivanov
Keyword(s):  
Electron Transfer ◽  
Reversible Electron Transfer

scholarly journals Redox-Active Monolayers Self-Assembled on Gold Electrodes—Effect of Their Structures on Electrochemical Parameters and DNA Sensing Ability

Molecules ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 607 ◽  
Author(s):  
Kamila Malecka ◽  
Shalini Menon ◽  
Gopal Palla ◽  
Krishnapillai Girish Kumar ◽  
Mathias Daniels ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Transition Metal ◽  
Redox Activity ◽  
Gold Electrodes ◽  
Complex Structures ◽  
Transfer Coefficients ◽  
Sensing Properties ◽  
Redox Active ◽  
Electrochemical Parameters ◽  
Self Assembled

The background: The monolayers self-assembled on the gold electrode incorporated transition metal complexes can act both as receptor (“host” molecules) immobilization sites, as well as transducer for interface recognitions of “guest” molecules present in the aqueous solutions. Their electrochemical parameters influencing the sensing properties strongly depend on the transition metal complex structures. The objectives: The electrochemical characterization of the symmetric terpyridine–M2+–terpyridine and asymmetric dipyrromethene–M2+–terpyridine complexes modified with ssDNA probe covalently attached to the gold electrodes and exploring their ssDNA sensing ability were the main aims of the research presented. The methods: Two transition metal cations have been selected: Cu2+ and Co2+ for creation of redox-active monolayers. The electron transfer coefficients indicating the reversibility and electron transfer rate constant measuring kinetic of redox reactions have been determined for all SAMs studied using: Cyclic Voltammetry, Osteryoung Square-Wave Voltammetry, and Differential Pulse Voltammetry. All redox-active platforms have been applied for immobilization of ssDNA probe. Next, their sensing properties towards complementary DNA target have been explored electrochemically. The results: All SAMs studied were stable displaying quasi-reversible redox activity. The linear relationships between cathodic and anodic current vs. san rate were obtained for both symmetric and asymmetric SAMs incorporating Co2+ and Cu2+, indicating that oxidized and reduced redox sites are adsorbed on the electrode surface. The ssDNA sensing ability were observed in the fM concentration range. The low responses towards non-complementary ssDNA sequences provided evidences for sensors good selectivity. The conclusions: All redox-active SAMs modified with a ssDNA probe were suitable for sensing of ssDNA target, with very good sensitivity in fM range and very good selectivity. The detection limits obtained for SAMs incorporating Cu2+, both symmetric and asymmetric, were better in comparison to SAMs incorporating Co2+. Thus, selection of the right transition metal cation has stronger influence on ssDNA sensing ability, than complex structures.

Surface concentrations for a mixed transfer process at an expanding spherical electrode

1966 ◽  
Vol 19 (6) ◽  
pp. 923 ◽  
Author(s):  
CM Gorden ◽  
RF Matlak
Keyword(s):  
Electron Transfer ◽  
Chemical Reaction ◽  
Transfer Process ◽  
Transfer Reaction ◽  
Electron Transfer Reaction ◽  
Spherical Electrode ◽  
Reversible Electron Transfer ◽  
Irreversible Chemical Reaction

An expression has been derived for the concentration of oxidant and reductant at the surface of an expanding spherical electrode as a function of time and the polarizing potential in the case where a slow irreversible chemical reaction follows a reversible electron transfer reaction under the conditions of a somewhat idealized polarographic system.

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