Photochemical Reactions and Photoinduced Electron-Transfer Processes in Liquids, Frozen Solutions, and Proteins as Studied by Multifrequency Time-Resolved EPR Spectroscopy

2006 ◽  
Vol 89 (10) ◽  
pp. 2544-2589 ◽  
Author(s):  
Anton Savitsky ◽  
Klaus Möbius
Keyword(s):  
Electron Transfer ◽  
Epr Spectroscopy ◽  
Photoinduced Electron Transfer ◽  
Photochemical Reactions ◽  
Time Resolved ◽  
Transfer Processes ◽  
Frozen Solutions ◽  
Electron Transfer Processes

Photoinduced Electron Transfer Processes in Rotaxanes Containing [60]Fullerene and Ferrocene: Effect of Axle Charge on Light-Induced Molecular Motion

2006 ◽  
Vol 59 (3) ◽  
pp. 186 ◽  
Author(s):  
Atula S. D. Sandanayaka ◽  
Hisahiro Sasabe ◽  
Yasuyuki Araki ◽  
Nobuhiro Kihara ◽  
Yoshio Furusho ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Transient Absorption ◽  
Solvent Polarity ◽  
Orbital Method ◽  
Time Resolved ◽  
Transfer Processes ◽  
Recombination Processes ◽  
Electron Transfer Processes ◽  
Absorption Measurements

Two rotaxanes containing [60]fullerene (C60) as pendants on a crown-ether necklace, to which ferrocene (Fc) as axle stoppers were added, have been synthesized. One rotaxane has an ammonium cation in the centre of the axle (C60;Fc)Rot+ and the other has a neutral axle (C60;Fc)Rot. Optimized structures, calculated using a molecular orbital method, suggest that in the ground states (C60;Fc)Rot+ has a shorter distance between C60 and Fc than that of (C60;Fc)Rot. In both rotaxanes, efficient intra-rotaxane photoinduced electron-transfer processes have been observed by the selective excitation of C60 which acts as a photosensitized electron acceptor. The rates and efficiencies of the charge-separation and charge-recombination processes were evaluated by time-resolved fluorescence and transient absorption measurements with changing solvent polarity. From the different kinetic parameters between (C60;Fc)Rot+ and (C60;Fc)Rot, the light-induced molecular motions of these rotaxanes in the excited states and charge-separated states were separately revealed.

Time-Resolved Spectroscopic Study on Photoinduced Electron-Transfer Processes in Zn(II)porphyrin-Zn(II)chlorin-Fullerene Triad

ChemPhysChem ◽  
2003 ◽  
Vol 4 (9) ◽  
pp. 951-958 ◽  
Author(s):  
Jeong-Hyon Ha ◽  
Hyun Sun Cho ◽  
Dongho Kim ◽  
Jong-Cheol Lee ◽  
Tae-Young Kim ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Spectroscopic Study ◽  
Photoinduced Electron Transfer ◽  
Time Resolved ◽  
Transfer Processes ◽  
Electron Transfer Processes

Photoinduced electron-transfer processes between phthalocyanines and perylene derivatives

2006 ◽  
Vol 10 (10) ◽  
pp. 1190-1196 ◽  
Author(s):  
Koji Kitazume ◽  
Yu Chen ◽  
Mitsunari Itou ◽  
Yasuyuki Araki ◽  
Satoshi Uchida ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Transient Absorption ◽  
Triplet States ◽  
Intermolecular Electron Transfer ◽  
Absorption Bands ◽  
Time Resolved ◽  
Transfer Processes ◽  
Perylene Derivatives ◽  
Electron Transfer Processes

Photoinduced electron-transfer processes between phthalocyanines ( H2Pc and ZnPc ) as electron donors and perylene derivatives as electron acceptors have been studied using a time-resolved, nanosecond transient absorption method in benzonitrile. The observed findings show that intermolecular electron transfer takes place via the excited triplet states of ZnPc and H2Pc , as confirmed by the characteristic transient absorption bands in the near-IR region. The visible light excitation of the mixtures of H2Pc and the perylene derivatives adsorbed onto TiO2gave a relatively high photovoltaic efficiency.

Photoinduced electron transfer in mechanically interlocked suit[3]ane systems

2021 ◽  
Author(s):  
Anton J Stasyuk ◽  
Olga A. Stasyuk ◽  
Miquel Solà ◽  
Alexander Voityuk
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
New Class ◽  
Transfer Processes ◽  
Two Component ◽  
Electron Transfer Processes

Suitanes, a new class of two-component mechanically interlocked systems, have recently been developed. In this work, we report a detailed study of photoinduced electron transfer processes in the suit[3]anes consisting...

Photoinduced Electron Transfer Processes in 1,8-Naphthalimide-Linker-Phenothiazine Dyads

2006 ◽  
Vol 110 (23) ◽  
pp. 11062-11068 ◽  
Author(s):  
Dae Won Cho ◽  
Mamoru Fujitsuka ◽  
Akira Sugimoto ◽  
Ung Chan Yoon ◽  
Patrick S. Mariano ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photoinduced Electron Transfer ◽  
Transfer Processes ◽  
Electron Transfer Processes
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