Singlet and Triplet State Back Electron Transfer from Photogenerated Radical Ion Pairs Studied by Time-Resolved CIDNP

1996 ◽  
Vol 100 (5) ◽  
pp. 1657-1665 ◽  
Author(s):  
Erik Schaffner ◽  
Hanns Fischer
Keyword(s):  
Electron Transfer ◽  
Triplet State ◽  
Ion Pairs ◽  
Time Resolved ◽  
Back Electron Transfer

Effect of Annealing Temperature on Back Electron Transfer and Distribution of Deep Trap Sites in Dye-Sensitized TiO2, Studied by Time-Resolved Infrared Spectroscopy

2004 ◽  
Vol 108 (9) ◽  
pp. 2963-2969 ◽  
Author(s):  
Kan Takeshita ◽  
Yutaka Sasaki ◽  
Masahiro Kobashi ◽  
Yuki Tanaka ◽  
Shuichi Maeda ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Infrared Spectroscopy ◽  
Annealing Temperature ◽  
Deep Trap ◽  
Time Resolved ◽  
Dye Sensitized ◽  
Back Electron Transfer ◽  
Time Resolved Infrared Spectroscopy

Diffusion of Solvent-Separated Ion Pairs Controls Back Electron Transfer Rate in Graphene Quantum Dots

2018 ◽  
Vol 122 (28) ◽  
pp. 15819-15825 ◽  
Author(s):  
Ayan Bhattacharyya ◽  
Soumalya Mukherjee ◽  
Anju Chadha ◽  
Edamana Prasad
Keyword(s):  
Quantum Dots ◽  
Electron Transfer ◽  
Transfer Rate ◽  
Ion Pairs ◽  
Graphene Quantum Dots ◽  
Electron Transfer Rate ◽  
Back Electron Transfer

Electron transfer and back electron transfer in photoexcited ion pairs: forward and back directions have different maximum rates

1991 ◽  
Vol 113 (20) ◽  
pp. 7823-7825 ◽  
Author(s):  
Chaofeng Zou ◽  
Jeffrey B. Miers ◽  
Richard M. Ballew ◽  
Dana D. Dlott ◽  
Gary B. Schuster
Keyword(s):  
Electron Transfer ◽  
Ion Pairs ◽  
Back Electron Transfer

Control of back electron transfer from charge-transfer ion pairs by zeolite supercages

1991 ◽  
Vol 113 (4) ◽  
pp. 1419-1421 ◽  
Author(s):  
S. Sankararaman ◽  
K. B. Yoon ◽  
T. Yabe ◽  
Jay K. Kochi
Keyword(s):  
Electron Transfer ◽  
Charge Transfer ◽  
Ion Pairs ◽  
Back Electron Transfer

Fluorescence quenching of 9-cyanoanthracene by metallo-octaethylporphyrins in cyanobenzene

2015 ◽  
Vol 19 (09) ◽  
pp. 1063-1071 ◽  
Author(s):  
Mihir Ghosh ◽  
Biswajit Roy ◽  
Koushik Majhi ◽  
Aruna K. Mora ◽  
Sukhendu Nath ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Steady State ◽  
Energy Transfer Process ◽  
Transfer Reactions ◽  
Simultaneous Occurrence ◽  
Gibbs Free Energy Change ◽  
Time Resolved ◽  
Electron Transfer Reactions ◽  
Back Electron Transfer ◽  
Marcus Inverted Region

Investigations are carried out on the nature of photoinduced electron transfer reactions within some metallo-octaethylporphyrin (zinc octaethylporphyrin and magnesium octaethylporphyrin) donors and acceptor 9-cyanoanthracene in cyanobenzene at 300 K by steady state and time-resolved spectroscopic methods. Acceptor is selectively excited at 366 nm and 374 nm for steady state and time-resolved measurements, respectively, where donor metalloporphyrins possess negligible absorbance. Evidence is found for simultaneous occurrence of Förster's type singlet–singlet energy transfer process along with electron transfer. High exergonic values of Gibbs free energy change for both forward and back electron transfer reactions indicate the possibility of occurrences of these two consecutive processes in the Marcus inverted region.

Syntheses, Spectroelectrochemistry and Photoinduced Electron-Transfer Processes of Novel Ru and Os Dyad and Triad Complexes with Functionalized Diimide Ligands

2001 ◽  
Vol 66 (2) ◽  
pp. 307-337 ◽  
Author(s):  
M. Delower Hossain ◽  
Masa-aki Haga ◽  
Bobak Gholamkhass ◽  
Koichi Nozaki ◽  
Minoru Tsushima ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Exponential Decay ◽  
Intramolecular Electron Transfer ◽  
Time Resolved ◽  
Mlct Transition ◽  
Ligand Charge Transfer ◽  
Back Electron Transfer ◽  
Donor Acceptor ◽  
Ru Complexes ◽  
Electron Transfer Processes

A series of mono- and dinuclear Ru complexes containing a bridging ligand, L-diimide-L (L = 2-(2-pyridyl)benzimidazole; diimide = benzene-1,2:4,5-bis(dicarboximide) (bdi; pyromellitimide) or naphthalene-1,8:4,5-bis(dicarboximide) (ndi), with either propane or xylene group as linkers, have been prepared. The mono- and dinuclear Ru complexes containing the bdi or ndi ligand, exhibit characteristic metal-to-ligand charge transfer (MLCT) transition at 458 nm. The mono- and dinuclear Ru/Os complexes exhibit a rich redox chemistry arising from both M(II) to M(III) oxidation and ligand-based consecutive reduction of diimide and 2,2'-bipyridine (bpy) ligands. The emission decays fit well with double- or triple-exponential decay models. The non-exponential decay curve reveals the existence of several conformers in solution due to the flexible propane or p-xylene linker. The much shorter emission lifetimes of the [M(bpy)2(L-diimide-L)] complexes compared with the parent [M(bpy)2L] indicates the intramolecular electron-transfer from the excited M(bpy)2 moiety to the diimide. The fastest rates of electron transfer (3 · 1010 s-1) are attributable to the folded conformers suitable for the electron donor/acceptor through-space interaction. A time-resolved absorption spectroscopic study of the dinuclear bdi and ndi complexes revealed appearance of the electron-transfer products, M(III) and the diimide radical anion, and their rapid disappearance. The effect of the linkers of the ligand L-diimide-L on the rates of electron transfer and the back electron transfer is also discussed.

Study of picosecond processes of an intercalated dipyridophenazine Cr(iii) complex bound to defined sequence DNAs using transient absorption and time-resolved infrared methods

2014 ◽  
Vol 43 (47) ◽  
pp. 17606-17609 ◽  
Author(s):  
Stephen J. Devereux ◽  
Páraic M. Keane ◽  
Suni Vasudevan ◽  
Igor V. Sazanovich ◽  
Michael Towrie ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Transient Absorption ◽  
Time Resolved ◽  
Back Electron Transfer ◽  
Excited State Quenching ◽  
Infrared Methods

Excited-state quenching of DNA intercalated [Cr(phen)2(dppz)]3+ by guanine proceeds by rapid forward and back electron transfer of <3 ps.

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