Remote and Adjacent Excited-State Electron Transfer at TiO2Interfaces Sensitized to Visible Light with Ru(II) Compounds

2005 ◽  
Vol 44 (25) ◽  
pp. 9305-9313 ◽  
Author(s):  
Feng Liu ◽  
Gerald J. Meyer
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Visible Light ◽  
State Electron

Excited state electron transfer after visible light absorption by the Co(i) state of vitamin B12

2014 ◽  
Vol 50 (87) ◽  
pp. 13304-13306 ◽  
Author(s):  
Darren Achey ◽  
Erinn C. Brigham ◽  
Brian N. DiMarco ◽  
Gerald J. Meyer
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Visible Light ◽  
Vitamin B12 ◽  
Light Absorption ◽  
Excitation Wavelength ◽  
Vitamin B ◽  
Visible Light Absorption ◽  
State Electron

The Co(i) form of vitamin B12 was found to undergo excitation wavelength-dependent excited state electron transfer to TiO2.

scholarly journals Improved Visible Light Absorption of Potent Iridium(III) Photo-oxidants for Excited-State Electron Transfer Chemistry

2020 ◽  
Vol 142 (6) ◽  
pp. 2732-2737 ◽  
Author(s):  
Robin Bevernaegie ◽  
Sara A. M. Wehlin ◽  
Eric J. Piechota ◽  
Michael Abraham ◽  
Christian Philouze ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Visible Light ◽  
Light Absorption ◽  
Visible Light Absorption ◽  
State Electron

Light-Triggered Switching of Quantum Dot Photoluminescence through Excited-State Electron Transfer to Surface-Bound Photochromic Molecules

Nano Letters ◽  
2021 ◽  
Author(s):  
Suyog Padgaonkar ◽  
Christopher T. Eckdahl ◽  
Jakub K. Sowa ◽  
Rafael López-Arteaga ◽  
Dana E. Westmoreland ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Quantum Dot ◽  
State Electron ◽  
Photochromic Molecules

scholarly journals Light-driven deracemization enabled by excited-state electron transfer

Science ◽  
2019 ◽  
Vol 366 (6463) ◽  
pp. 364-369 ◽  
Author(s):  
Nick Y. Shin ◽  
Jonathan M. Ryss ◽  
Xin Zhang ◽  
Scott J. Miller ◽  
Robert R. Knowles
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Hydrogen Atom ◽  
Visible Light ◽  
Asymmetric Synthesis ◽  
Hydrogen Atom Transfer ◽  
Product Distributions ◽  
Reaction Proceeds ◽  
Molecular Catalysts ◽  
Distinct Approach

Deracemization is an attractive strategy for asymmetric synthesis, but intrinsic energetic challenges have limited its development. Here, we report a deracemization method in which amine derivatives undergo spontaneous optical enrichment upon exposure to visible light in the presence of three distinct molecular catalysts. Initiated by an excited-state iridium chromophore, this reaction proceeds through a sequence of favorable electron, proton, and hydrogen-atom transfer steps that serve to break and reform a stereogenic C–H bond. The enantioselectivity in these reactions is jointly determined by two independent stereoselective steps that occur in sequence within the catalytic cycle, giving rise to a composite selectivity that is higher than that of either step individually. These reactions represent a distinct approach to creating out-of-equilibrium product distributions between substrate enantiomers using excited-state redox events.

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