Time-Resolved EPR Study on Reorganization Energies for Charge Recombination Processes in Nanometer-Separated Radical Ion Pairs

2002 ◽  
Vol 106 (39) ◽  
pp. 10074-10081 ◽  
Author(s):  
Tomoaki Yago ◽  
Yasuhiro Kobori ◽  
Kimio Akiyama ◽  
Shozo Tero-Kubota
Keyword(s):  
Ion Pairs ◽  
Charge Recombination ◽  
Time Resolved ◽  
Recombination Processes ◽  
Reorganization Energies

scholarly journals Charge recombination processes in minerals studied using optically stimulated luminescence and time-resolved exo-electrons

2010 ◽  
Vol 43 (32) ◽  
pp. 325502 ◽  
Author(s):  
Sumiko Tsukamoto ◽  
Andrew Murray ◽  
Christina Ankjærgaard ◽  
Mayank Jain ◽  
Torben Lapp
Keyword(s):  
Charge Recombination ◽  
Optically Stimulated Luminescence ◽  
Time Resolved ◽  
Recombination Processes

scholarly journals Electron and hydrogen self-exchange of free radicals of sterically hindered tertiary aliphatic amines investigated by photo-CIDNP

2013 ◽  
Vol 9 ◽  
pp. 437-446 ◽  
Author(s):  
Martin Goez ◽  
Isabell Frisch ◽  
Ingo Sartorius
Keyword(s):  
Ion Pairs ◽  
Activation Parameters ◽  
Radical Cations ◽  
Outer Sphere ◽  
Exchange Reactions ◽  
Radical Pairs ◽  
Time Resolved ◽  
Alkyl Radicals ◽  
Acid Base Equilibrium ◽  
Reorganization Energies

The photoreactions of diazabicyclo[2,2,2]octane (DABCO) and triisopropylamine (TIPA) with the sensitizers anthraquinone (AQ) and xanthone (XA) or benzophenone (BP) were investigated by time-resolved photo-CIDNP (photochemically induced dynamic nuclear polarization) experiments. By varying the radical-pair concentration, it was ensured that these measurements respond only to self-exchange reactions of the free amine-derived radicals (radical cations DH • + or α-amino alkyl radicals D • ) with the parent amine DH; the acid–base equilibrium between DH • + and D • also plays no role. Although the sensitizer does not at all participate in the observed processes, it has a pronounced influence on the CIDNP kinetics because the reaction occurs through successive radical pairs. With AQ, the polarizations stem from the initially formed radical-ion pairs, and escaping DH • + then undergoes electron self-exchange with DH. In the reaction sensitized with XA (or BP), the polarizations arise in a secondary pair of neutral radicals that is rapidly produced by in-cage proton transfer, and the CIDNP kinetics are due to hydrogen self-exchange between escaping D • and DH. For TIPA, the activation parameters of both self-exchange reactions were determined. Outer-sphere reorganization energies obtained with the Marcus theory gave very good agreement between experimental and calculated values of ∆G ‡ 298.

scholarly journals Effect of hydrogen chloride etching on carrier recombination processes of indium phosphide nanowires

Nanoscale ◽  
2019 ◽  
Vol 11 (40) ◽  
pp. 18550-18558 ◽  
Author(s):  
Xiaojun Su ◽  
Xulu Zeng ◽  
Hynek Němec ◽  
Xianshao Zou ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Indium Phosphide ◽  
Hydrogen Chloride ◽  
Charge Recombination ◽  
Time Resolved ◽  
Time Resolved Spectroscopy ◽  
Carrier Recombination ◽  
Recombination Processes

The effect of hydrogen chloride etching on charge recombination processes of indium phosphide nanowires was studied by means of time-resolved spectroscopy.

Time-Resolved EPR Studies of Photogenerated Radical Ion Pairs Separated byp-Phenylene Oligomers and of Triplet States Resulting from Charge Recombination†

2006 ◽  
Vol 110 (50) ◽  
pp. 25163-25173 ◽  
Author(s):  
Zachary E. X. Dance ◽  
Qixi Mi ◽  
David W. McCamant ◽  
Michael J. Ahrens ◽  
Mark A. Ratner ◽  
...  
Keyword(s):  
Ion Pairs ◽  
Charge Recombination ◽  
Triplet States ◽  
Time Resolved

scholarly journals Ultrafast Charge Recombination of Photogenerated Ion Pairs to an Electronic Excited State

2002 ◽  
Vol 106 (19) ◽  
pp. 4833-4837 ◽  
Author(s):  
Ana Morandeira ◽  
Laurine Engeli ◽  
Eric Vauthey
Keyword(s):  
Excited State ◽  
Ion Pairs ◽  
Charge Recombination ◽  
Electronic Excited State
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