scholarly journals Electron donor-free photoredox catalysis via an electron transfer cascade by cooperative organic photocatalysts

2018 ◽  
Vol 8 (14) ◽  
pp. 3539-3547 ◽  
Author(s):  
Lei Wang ◽  
Irina Rörich ◽  
Charusheela Ramanan ◽  
Paul W. M. Blom ◽  
Wei Huang ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Electron Donor ◽  
Photoredox Catalysis

Electron transfer cascade in cooperative organic photocatalysts can prevent the use of sacrificial reagent for photoredox catalysis.

scholarly journals Synthesis of an elusive, stable 2-azaallyl radical guided by electrochemical and reactivity studies of 2-azaallyl anions

2021 ◽  
Author(s):  
Grace B. Panetti ◽  
Patrick J. Carroll ◽  
Michael R. Gau ◽  
Brian C. Manor ◽  
Eric J. Schelter ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Electron Donor ◽  
Transfer Characteristics

The super electron donor (SED) capabilities of 2-azaallyl anions has recently been discovered and applied to diverse reactivity; their structures and electron transfer characteristics are reported herein.

scholarly journals Cavity-promotion by pillar[5]arenes expedites organic photoredox-catalysed reductive dehalogenations

2021 ◽  
Author(s):  
Maximilian Schmidt ◽  
Birgit Esser
Keyword(s):  
Electron Transfer ◽  
Photoredox Catalysis ◽  
Photo Induced Electron Transfer

The efficiency of the photo-induced electron transfer in photoredox catalysis is limited by the diffusional collision of the excited catalyst and the substrate. We herein present cavity-bound photoredox catalysts, which...

scholarly journals Catalytic photoinduced electron transport across a lipid bilayer mediated by a membrane-soluble electron relay

2015 ◽  
Vol 51 (96) ◽  
pp. 17128-17131 ◽  
Author(s):  
B. Limburg ◽  
E. Bouwman ◽  
S. Bonnet
Keyword(s):  
Electron Transfer ◽  
Electron Transport ◽  
Lipid Bilayer ◽  
Electron Donor ◽  
Electron Acceptor ◽  
The Other

Unidirectional photocatalytic electron transfer from a hydrophilic electron donor encapsulated in the interior of a liposome, to a hydrophilic electron acceptor on the other side of the membrane, has been achieved using the simple membrane-soluble electron relay 1-methoxy-N-methylphenazinium (MMP+).

Ultrafast IR spectroscopy of photo-induced electron transfer in self-assembled donor–acceptor coordination cages

2017 ◽  
Vol 19 (21) ◽  
pp. 13596-13603 ◽  
Author(s):  
J. Ahrens ◽  
M. Frank ◽  
G. H. Clever ◽  
D. Schwarzer
Keyword(s):  
Electron Transfer ◽  
Ir Spectroscopy ◽  
Electron Donor ◽  
Electron Acceptor ◽  
Donor Acceptor ◽  
Coordination Cages ◽  
Photo Induced Electron Transfer ◽  
Self Assembled

Photo-excitation of self-assembled palladium based coordination cages consisting of phenothiazine electron donor and anthraquinone electron acceptor ligands produce charge separated states with lifetimes of up to 1.5 ns.

scholarly journals Direct Electron Transfer between the frhAGB-Encoded Hydrogenase and Thioredoxin Reductase in the Nonmethanogenic Archaeon Thermococcus onnurineus NA1

2020 ◽  
Vol 86 (6) ◽  
Author(s):  
Hae-Chang Jung ◽  
Jae Kyu Lim ◽  
Tae-Jun Yang ◽  
Sung Gyun Kang ◽  
Hyun Sook Lee
Keyword(s):  
Electron Transfer ◽  
Electron Donor ◽  
Direct Electron Transfer ◽  
Thioredoxin Reductase ◽  
Thermococcus Onnurineus Na1 ◽  
Content Type ◽  
Protein Target ◽  
Redox Partner ◽  
Significant Step

ABSTRACT To date, NAD(P)H, ferredoxin, and coenzyme F420 have been identified as electron donors for thioredoxin reductase (TrxR). In this study, we present a novel electron source for TrxR. In the hyperthermophilic archaeon Thermococcus onnurineus NA1, the frhAGB-encoded hydrogenase, a homolog of the F420-reducing hydrogenase of methanogens, was demonstrated to interact with TrxR in coimmunoprecipitation experiments and in vitro pulldown assays. Electrons derived from H2 oxidation by the frhAGB-encoded hydrogenase were transferred to TrxR and reduced Pdo, a redox partner of TrxR. Interaction and electron transfer were observed between TrxR and the heterodimeric hydrogenase complex (FrhAG) as well as the heterotrimeric complex (FrhAGB). Hydrogen-dependent reduction of TrxR was 7-fold less efficient than when NADPH was the electron donor. This study not only presents a different type of electron donor for TrxR but also reveals new functionality of the frhAGB-encoded hydrogenase utilizing a protein as an electron acceptor. IMPORTANCE This study has importance in that TrxR can use H2 as an electron donor with the aid of the frhAGB-encoded hydrogenase as well as NAD(P)H in T. onnurineus NA1. Further studies are needed to explore the physiological significance of this protein. This study also has importance as a significant step toward understanding the functionality of the frhAGB-encoded hydrogenase in a nonmethanogen; the hydrogenase can transfer electrons derived from oxidation of H2 to a protein target by direct contact without the involvement of an electron carrier, which is distinct from the mechanism of its homologs, F420-reducing hydrogenases of methanogens.

Carbazole-perylenebisimide electron donor/acceptor dyads showing efficient spin orbit charge transfer intersystem crossing (SOCT-ISC) and photo-driven intermolecular electron transfer

2020 ◽  
Vol 8 (14) ◽  
pp. 4701-4712 ◽  
Author(s):  
Noreen Rehmat ◽  
Antonio Toffoletti ◽  
Zafar Mahmood ◽  
Xue Zhang ◽  
Jianzhang Zhao ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Charge Transfer ◽  
Electron Donor ◽  
Intersystem Crossing ◽  
Spin Orbit ◽  
Intermolecular Electron Transfer ◽  
Donor Acceptor

An efficient spin orbit charge transfer intersystem crossing (SOCT-ISC) was demonstrated in non-orthogonal compact carbazole-perylenebisimide electron donor/acceptor dyads.

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