In Situ Switching of Photoinduced Electron Transfer Direction by Regulating the Redox State in Fullerene-Based Dyads

2020 ◽  
Vol 142 (9) ◽  
pp. 4411-4418 ◽  
Author(s):  
Yongqiang Chai ◽  
Xiaolong Liu ◽  
Bo Wu ◽  
Liping Liu ◽  
Zhuan Wang ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Redox State ◽  
Transfer Direction

Chemically regulating Rh(i)-Bodipy photoredox switches

2014 ◽  
Vol 50 (52) ◽  
pp. 6850-6852 ◽  
Author(s):  
A. M. Lifschitz ◽  
R. M. Young ◽  
J. Mendez-Arroyo ◽  
V. V. Roznyatovskiy ◽  
C. M. McGuirk ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Redox Potential ◽  
Photoinduced Electron Transfer ◽  
Coordination Complexes ◽  
Anionic Ligands

Photoinduced electron transfer from a Rh(i) center to an excited Bodipy unit within coordination complexes is regulated in situ by affecting the redox potential of either moiety thought the introduction of neutral and anionic ligands.

In Situ Lipid Membrane Formation Triggered by Intramolecular Photoinduced Electron Transfer

Langmuir ◽  
2017 ◽  
Vol 34 (3) ◽  
pp. 750-755 ◽  
Author(s):  
Takafumi Enomoto ◽  
Roberto J. Brea ◽  
Ahanjit Bhattacharya ◽  
Neal K. Devaraj
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Lipid Membrane ◽  
Membrane Formation

scholarly journals On-Line Raman Spectroscopic Study of Cytochromes’ Redox State of Biofilms in Microbial Fuel Cells

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 646 ◽  
Author(s):  
Adolf Krige ◽  
Magnus Sjöblom ◽  
Kerstin Ramser ◽  
Paul Christakopoulos ◽  
Ulrika Rova
Keyword(s):  
Electron Transfer ◽  
Fuel Cells ◽  
Oxidation State ◽  
Transfer Process ◽  
Microbial Fuel Cells ◽  
Redox State ◽  
Raman Peak ◽  
Electron Transfer Process ◽  
On Line

Bio-electrochemical systems such as microbial fuel cells and microbial electrosynthesis cells depend on efficient electron transfer between the microorganisms and the electrodes. Understanding the mechanisms and dynamics of the electron transfer is important in order to design more efficient reactors, as well as modifying microorganisms for enhanced electricity production. Geobacter are well known for their ability to form thick biofilms and transfer electrons to the surfaces of electrodes. Currently, there are not many “on-line” systems for monitoring the activity of the biofilm and the electron transfer process without harming the biofilm. Raman microscopy was shown to be capable of providing biochemical information, i.e., the redox state of C-type cytochromes, which is integral to external electron transfer, without harming the biofilm. In the current study, a custom 3D printed flow-through cuvette was used in order to analyze the oxidation state of the C-type cytochromes of suspended cultures of three Geobacter sulfurreducens strains (PCA, KN400 and ΔpilA). It was found that the oxidation state is a good indicator of the metabolic state of the cells. Furthermore, an anaerobic fluidic system enabling in situ Raman measurements was designed and applied successfully to monitor and characterize G. sulfurreducens biofilms during electricity generation, for both a wild strain, PCA, and a mutant, ΔS. The cytochrome redox state, monitored by the Raman peak areas, could be modulated by applying different poise voltages to the electrodes. This also correlated with the modulation of current transferred from the cytochromes to the electrode. The Raman peak area changed in a predictable and reversible manner, indicating that the system could be used for analyzing the oxidation state of the proteins responsible for the electron transfer process and the kinetics thereof in-situ.

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