Analyses of donor–acceptor distance-dependent rates of photo-induced electron transfer in flavoproteins with three kinds of electron transfer theories

2008 ◽  
Vol 348 (1-3) ◽  
pp. 237-241 ◽  
Author(s):  
Fumio Tanaka ◽  
Rong Rujkorakarn ◽  
Haik Chosrowjan ◽  
Seiji Taniguchi ◽  
Noboru Mataga
Keyword(s):  
Electron Transfer ◽  
Donor Acceptor ◽  
Photo Induced Electron Transfer

Ultrafast IR spectroscopy of photo-induced electron transfer in self-assembled donor–acceptor coordination cages

2017 ◽  
Vol 19 (21) ◽  
pp. 13596-13603 ◽  
Author(s):  
J. Ahrens ◽  
M. Frank ◽  
G. H. Clever ◽  
D. Schwarzer
Keyword(s):  
Electron Transfer ◽  
Ir Spectroscopy ◽  
Electron Donor ◽  
Electron Acceptor ◽  
Donor Acceptor ◽  
Coordination Cages ◽  
Photo Induced Electron Transfer ◽  
Self Assembled

Photo-excitation of self-assembled palladium based coordination cages consisting of phenothiazine electron donor and anthraquinone electron acceptor ligands produce charge separated states with lifetimes of up to 1.5 ns.

Hypochlorite-promoted inhibition of photo-induced electron transfer in phenothiazine–borondipyrromethene donor–acceptor dyad: a cost-effective and metal-free “turn-on” fluorescent chemosensor for hypochlorite

2017 ◽  
Vol 41 (13) ◽  
pp. 5322-5333 ◽  
Author(s):  
Disha Soni ◽  
Suneel Gangada ◽  
Naresh Duvva ◽  
Tapta Kanchan Roy ◽  
Surendra Nimesh ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Cost Effective ◽  
Fluorescent Chemosensor ◽  
Metal Free ◽  
Turn On ◽  
Donor Acceptor ◽  
Photo Induced Electron Transfer

APTZ-BODIPY based fluorescent chemosensor was designed and used for hypochlorite detection.

Light induced intramolecular energy and electron transfer events in carbazole–corrole and phenothiazine-corrole dyads

2020 ◽  
Vol 24 (05n07) ◽  
pp. 693-704
Author(s):  
B. Shivaprasadachary ◽  
A. R. Ramya ◽  
Govind Reddy ◽  
L. Giribabu
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Ground State ◽  
Transfer Rates ◽  
Fluorescence Studies ◽  
H Nmr ◽  
Quenching Efficiency ◽  
Energy And Electron Transfer ◽  
Donor Acceptor ◽  
Photo Induced Electron Transfer

We report two corrole based donor–acceptor (D–A) dyads, Cbz-Cor and Ptz-Cor to understand the energy/electron transfer reactions. In these D–A systems, the donor, either carbazole (Cbz) or phenothiazine (Ptz), is covalently connected at the meso-phenyl position of 10-(phenyl)-5,15-bis-(pentafluorophenyl)corrole (Ph-Cor) by C–N linkage. Both the dyads were characterized by 1H NMR, MALDI-TOF MS, UV-vis, electrochemical, computational methods, study state fluorescence and TCSPC techniques. A comparison of absorption spectra with their reference monomeric compounds (Cbz-Ph, Ptz-Ph and Ph-Cor) revealed minimal ground-state interactions between chromophores in both dyads. Fluorescence studies suggested that singlet–singlet energy transfer from 1Cbz* to corrole is the major photochemical pathway in the Cbz-Cor dyad with a quenching efficiency of [Formula: see text]99%. Detailed analysis of the data suggests that Forster’s dipole–dipole mechanism does not adequately explain this energy transfer. However, at a 410 nm excitation, florescence quenching is detected in Ptz-Cor (49%) supporting a photo induced electron transfer (PET) process from the ground state of PTZ to the excited state of corrole macrocycle. The electron-transfer rates ([Formula: see text] of Ptz-Cor are found in the range [Formula: see text] to [Formula: see text] and are concluded to be solvent dependent.

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