Photoinduced Formation of Bithiophene Radical Cation via a Hole-Transfer Process from CdS Nanocrystals

2013 ◽  
Vol 117 (45) ◽  
pp. 23996-24002 ◽  
Author(s):  
Alessandro Iagatti ◽  
Rebecca Flamini ◽  
Morena Nocchetti ◽  
Loredana Latterini
Keyword(s):  
Radical Cation ◽  
Transfer Process ◽  
Hole Transfer ◽  
Cds Nanocrystals

Application of Trajectory Surface Hopping to the Study of a Symmetry-Forbidden Intramolecular Hole Transfer Process in Bismethyleneadamantane Cation Radical

1999 ◽  
Vol 121 (48) ◽  
pp. 11171-11178 ◽  
Author(s):  
Garth A. Jones ◽  
Barry K. Carpenter ◽  
Michael N. Paddon-Row
Keyword(s):  
Transfer Process ◽  
Cation Radical ◽  
Hole Transfer ◽  
Surface Hopping

Formation of dimer radical cation of 1,1-dianisylethylene through two-step hole transfer processes during TiO2 photocatalytic reactions

2004 ◽  
Vol 45 (19) ◽  
pp. 3753-3756 ◽  
Author(s):  
Takashi Tachikawa ◽  
Sachiko Tojo ◽  
Mamoru Fujitsuka ◽  
Tetsuro Majima
Keyword(s):  
Radical Cation ◽  
Hole Transfer ◽  
Transfer Processes ◽  
Photocatalytic Reactions ◽  
Dimer Radical Cation

Near-Infrared Excitation of the peri-Xanthenoxanthene Radical Cation Drives Energy-Demanding Hole Transfer Reactions

2018 ◽  
Vol 122 (41) ◽  
pp. 23364-23370 ◽  
Author(s):  
Joseph A. Christensen ◽  
Jinyuan Zhang ◽  
Jiawang Zhou ◽  
Jordan N. Nelson ◽  
Michael R. Wasielewski
Keyword(s):  
Radical Cation ◽  
Near Infrared ◽  
Transfer Reactions ◽  
Hole Transfer ◽  
Infrared Excitation

Light-induced hole transfer in a hypervalent phosphorus(V) octaethylporphyrin bearing an axially linked bis(ethylenedithio)tetrathiafulvalene

2010 ◽  
Vol 14 (02) ◽  
pp. 178-187 ◽  
Author(s):  
Prashanth K. Poddutoori ◽  
Ann Dion ◽  
Songjie Yang ◽  
Melanie Pilkington ◽  
John D. Wallis ◽  
...  
Keyword(s):  
Steady State ◽  
Fluorescence Quenching ◽  
Radical Cation ◽  
High Efficiency ◽  
Chemical Oxidation ◽  
Reference Compound ◽  
Epr Spectrum ◽  
Hole Transfer ◽  
Time Resolved ◽  
Epr Measurements

A phosphorus(V) porphyrin bearing an axially linked bis(ethylenedithio)tetrathiafulvalene, dyad 1, and its radical cation phosphorus(V) porphyrin- O-CH2 -(bis(ethylenedithio)tetrathiafulvalene)+•, dyad 2, have been synthesized and studied as an electron hole donor-acceptor system. The absorption spectrum of dyad 1 does not show evidence for electronic coupling between the porphyrin and the bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF) moieties. However, the steady-state fluorescence of the porphyrin chromophore is quantitatively quenched and its transient fluorescence lifetime is shortened compared to a reference compound in which the BEDT-TTF moiety is replaced by a methoxy group. Chemical oxidation of the BEDT-TTF moiety in dyad 1 to give dyad 2 results in recovery of the fluorescence intensity. This behavior suggests that the fluorescence quenching in dyad 1 is the result of intramolecular hole transfer from the the excited porphyrin to the BEDT-TTF moiety. The occurence of hole transfer in dyad 1 is confirmed by freeze-trapping and time-resolved electron paramagnetic resonance (EPR) measurements. The freeze-trapping EPR experiments show that steady-state irradiation of the complex leads to accumulation of its radical cation (dyad 2) while the transient EPR measurements at 5 °C show that flash irradiation of dyad 1 results in formation of a radical-ion pair with a lifetime of at least 300 ns. The triplet state of the porphyrin, which is formed by intersystem crossing and gives a strong transient EPR spectrum in the reference compound, is not observed for dyad 1. Together, the fluorescence quenching and the polarization pattern of the radical pair suggest that the hole transfer occurs from the excited singlet state of the porphyrin with high efficiency.

14N/15N ISOTOPE EFFECT ON THE ELECTRON TRANSFER PROCESS BETWEEN PHENOTHIAZINE AND ITS RADICAL CATION

1997 ◽  
Vol 10 (3) ◽  
pp. 152-158 ◽  
Author(s):  
Long-Min Wu ◽  
Jian-Ming L� ◽  
Xiao-Lin Wen ◽  
Xue-Qing Jia ◽  
You-Cheng Liu ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Isotope Effect ◽  
Radical Cation ◽  
Transfer Process ◽  
15N Isotope ◽  
Electron Transfer Process

Contributions of the Distance-Dependent Reorganization Energy and Proton-Transfer to the Hole-Transfer Process in DNA

2005 ◽  
Vol 11 (13) ◽  
pp. 3835-3842 ◽  
Author(s):  
Tadao Takada ◽  
Kiyohiko Kawai ◽  
Mamoru Fujitsuka ◽  
Tetsuro Majima
Keyword(s):  
Proton Transfer ◽  
Transfer Process ◽  
Reorganization Energy ◽  
Hole Transfer

Bimolecular Hole Transfer from the Trimethoxybenzene Radical Cation in the Excited State

2007 ◽  
Vol 111 (22) ◽  
pp. 4743-4747 ◽  
Author(s):  
Xichen Cai ◽  
Mamoru Fujitsuka ◽  
Tetsuro Majima
Keyword(s):  
Excited State ◽  
Radical Cation ◽  
Hole Transfer
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