Photoinduced Electron Transfer and Charge-Recombination in 2-Ureido-4[1H]-Pyrimidinone Quadruple Hydrogen-Bonded Porphyrin–Fullerene Assemblies

2011 ◽  
Vol 115 (47) ◽  
pp. 23634-23641 ◽  
Author(s):  
Mao-Lin Yu ◽  
Su-Min Wang ◽  
Ke Feng ◽  
Tony Khoury ◽  
Maxwell J. Crossley ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Charge Recombination ◽  
Hydrogen Bonded

Photoinduced electron transfer in 5-bromouracil labeled DNA. A contrathermodynamic mechanism revisited by electron transfer theories

2019 ◽  
Vol 21 (8) ◽  
pp. 4387-4393 ◽  
Author(s):  
Lorenzo Cupellini ◽  
Paweł Wityk ◽  
Benedetta Mennucci ◽  
Janusz Rak
Keyword(s):  
Electron Transfer ◽  
Charge Separation ◽  
Photoinduced Electron Transfer ◽  
Charge Recombination ◽  
Photoinduced Charge Separation ◽  
Photoinduced Charge

Neither the rates of photoinduced charge separation nor charge recombination account for the substantial damage observed in the 5′-ABrU sequence.

scholarly journals Photoinduced dynamics in hydrogen-bonded rotaxanes

2003 ◽  
Vol 75 (8) ◽  
pp. 1055-1060 ◽  
Author(s):  
Albert M. Brouwer ◽  
Sandro M. Fazio ◽  
Céline Frochot ◽  
Francesco G. Gatti ◽  
David A. Leigh ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Hydrogen Bonds ◽  
Time Scale ◽  
Photoinduced Electron Transfer ◽  
Large Amplitude ◽  
Medium Effects ◽  
Macrocyclic Ring ◽  
Large Amplitude Motion ◽  
Photoinduced Processes ◽  
Hydrogen Bonded

Two classes of rotaxanes are described in which photoinduced processes modulate a large-amplitude motion. In the first type, E–Z-isomerization of a fumaric diamide unit to a maleic diamide leads to a substantial weakening of the hydrogen bonds between the diamide and the macrocyclic ring that surrounds it. As a result, the rate of the pirouetting motion is increased approximately by six orders of magnitude. In the second type, intermolecular photoinduced electron transfer is used to induce a reversible shuttling motion on a time scale of microseconds. Medium effects on the rate of shuttling are presented.

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