Ultrafast excitation transfer and charge stabilization in a newly assembled photosynthetic antenna-reaction center mimic composed of boron dipyrrin, zinc porphyrin and fullerene

2011 ◽  
Author(s):  
Francis D’Souza ◽  
Channa A. Wijesinghe ◽  
Mohamed E. El-Khouly ◽  
Jessica Hudson ◽  
Marja Niemi ◽  
...  
Keyword(s):  
Reaction Center ◽  
Excitation Transfer ◽  
Zinc Porphyrin ◽  
Photosynthetic Antenna ◽  
Charge Stabilization

Multi-modular, tris(triphenylamine) zinc porphyrin–zinc phthalocyanine–fullerene conjugate as a broadband capturing, charge stabilizing, photosynthetic ‘antenna-reaction center’ mimic

Nanoscale ◽  
2015 ◽  
Vol 7 (15) ◽  
pp. 6813-6826 ◽  
Author(s):  
Chandra B. KC ◽  
Gary N. Lim ◽  
Francis D'Souza
Keyword(s):  
Electron Transfer ◽  
Reaction Center ◽  
Zinc Phthalocyanine ◽  
Zinc Porphyrin ◽  
Donor Acceptor ◽  
Photosynthetic Antenna ◽  
Charge Stabilization

Charge stabilization as a result of electron transfer followed by a hole-shift mechanism is demonstrated in a supramolecular multi-modular donor–acceptor assembly.

Some aspects of excitation transfer in the photosystem I reaction center

1996 ◽  
Author(s):  
Nigel T. H. White ◽  
Timothy M. Feehan ◽  
Jonathan R. G. Thorne ◽  
Godfrey S. Beddard ◽  
Peter Heathcote
Keyword(s):  
Reaction Center ◽  
Photosystem I ◽  
Excitation Transfer

Ultrafast Photodynamics and Quantitative Evaluation of Biohybrid Photosynthetic Antenna and Reaction Center Complexes Generating Photocurrent

2020 ◽  
Vol 124 (16) ◽  
pp. 8605-8615 ◽  
Author(s):  
Yusuke Yoneda ◽  
Akari Goto ◽  
Nobutaka Takeda ◽  
Hiromi Harada ◽  
Masaharu Kondo ◽  
...  
Keyword(s):  
Reaction Center ◽  
Quantitative Evaluation ◽  
Reaction Center Complexes ◽  
Photosynthetic Antenna

Intramolecular photoinduced processes of newly synthesized dual zinc porphyrin-fullerene triad with flexible linkers

2006 ◽  
Vol 10 (12) ◽  
pp. 1380-1391 ◽  
Author(s):  
Mohamed E. El-Khouly ◽  
Jun Hasegawa ◽  
Atsuya Momotake ◽  
Mikio Sasaki ◽  
Yasuyuki Araki ◽  
...  
Keyword(s):  
Transient Absorption ◽  
Photophysical Properties ◽  
Ion Pair ◽  
Reaction Centre ◽  
Polar Solvents ◽  
Time Resolved ◽  
Zinc Porphyrin ◽  
Photosynthetic Antenna ◽  
Porphyrin Moiety ◽  
Photoinduced Processes

Zinc porphyrin-fullerene-zinc porphyrin triad, in which two zinc porphyrin ( ZnP ) moieties and a fullerene ( C 60) moiety are linked by flexible bonds and which is intended to be a working model of the photosynthetic antenna-reaction centre, has been newly synthesized. Its photophysical properties have been investigated by both time-resolved emission and transient absorption techniques. Excitation of the zinc porphyrin moiety of the triad induced charge separation, generating the radical ion pair, in which the electron localizes on the C 60 moiety and the hole localizes on the zinc porphyrin moiety. In polar solvents, the charge-separated states decayed with lifetimes of 300-600 ns returning to the ground state. Compared with ZnP - C 60 dyad, ZnP - C 60- ZnP triad showed longer lifetimes for the radical ion pair due to the conformation of the two ZnP moieties. The effects of the coordinating reagents on the zinc atom have been studied, with the expectation of conformational change of the two ZnP moieties with respect to C 60.

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