Accumulative electron transfer: Multiple charge separation in artificial photosynthesis

2012 ◽  
Vol 155 ◽  
pp. 233-252 ◽  
Author(s):  
Susanne Karlsson ◽  
Julien Boixel ◽  
Yann Pellegrin ◽  
Errol Blart ◽  
Hans-Christian Becker ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Charge Separation ◽  
Artificial Photosynthesis ◽  
Multiple Charge

Electron transfer and exciplex chemistry of functionalized nanocarbons: effects of electronic coupling and donor dimerization

2018 ◽  
Vol 3 (4) ◽  
pp. 352-366 ◽  
Author(s):  
Tomokazu Umeyama ◽  
Hiroshi Imahori
Keyword(s):  
Electron Transfer ◽  
Solar Energy ◽  
Energy Conversion ◽  
Charge Separation ◽  
Artificial Photosynthesis ◽  
Solar Energy Conversion ◽  
Electronic Coupling ◽  
The Past ◽  
Photoinduced Charge Separation ◽  
Photoinduced Charge

In the past few decades, research on the construction of donor–bridge–acceptor linked systems capable of efficient photoinduced charge separation has fundamentally contributed to the fields of artificial photosynthesis and solar energy conversion.

scholarly journals Coupled electron transfers in artificial photosynthesis

2007 ◽  
Vol 363 (1494) ◽  
pp. 1283-1291 ◽  
Author(s):  
Leif Hammarström ◽  
Stenbjörn Styring
Keyword(s):  
Electron Transfer ◽  
Water Splitting ◽  
Charge Separation ◽  
Artificial Photosynthesis ◽  
Transfer Reactions ◽  
Proton Reduction ◽  
Electron Transfer Reactions ◽  
Proton Coupled Electron Transfer ◽  
Natural Enzyme ◽  
Electron Transfer Processes

Light-induced charge separation in molecular assemblies has been widely investigated in the context of artificial photosynthesis. Important progress has been made in the fundamental understanding of electron and energy transfer and in stabilizing charge separation by multi-step electron transfer. In the Swedish Consortium for Artificial Photosynthesis, we build on principles from the natural enzyme photosystem II and Fe-hydrogenases. An important theme in this biomimetic effort is that of coupled electron-transfer reactions, which have so far received only little attention. (i) Each absorbed photon leads to charge separation on a single-electron level only, while catalytic water splitting and hydrogen production are multi-electron processes; thus there is the need for controlling accumulative electron transfer on molecular components. (ii) Water splitting and proton reduction at the potential catalysts necessarily require the management of proton release and/or uptake. Far from being just a stoichiometric requirement, this controls the electron transfer processes by proton-coupled electron transfer (PCET). (iii) Redox-active links between the photosensitizers and the catalysts are required to rectify the accumulative electron-transfer reactions, and will often be the starting points of PCET.

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