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Cyclic Tetramers of Zinc Chlorophylls as a Coupled Light-Harvesting Antenna-Charge-Separation System

Title
Cyclic Tetramers of Zinc Chlorophylls as a Coupled Light-Harvesting Antenna-Charge-Separation System
Authors
Shinozaki, YoshinaoOhkubo, KeiFukuzumi, ShunichiSugawa, KosukeOtsuki, Joe
Ewha Authors
Shunichi FukuzumiKei Okubo
SCOPUS Author ID
Shunichi Fukuzumiscopus; Kei Okuboscopus
Issue Date
2016
Journal Title
CHEMISTRY-A EUROPEAN JOURNAL
ISSN
0947-6539JCR Link1521-3765JCR Link
Citation
vol. 22, no. 3, pp. 1165 - 1176
Keywords
chlorophyllselectron transferenergy transferfullerenesself-assembly
Publisher
WILEY-V C H VERLAG GMBH
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
A coupled light-harvesting antenna-charge-separation system, consisting of self-assembled zinc chlorophyll derivatives that incorporate an electron-accepting unit, is reported. The cyclic tetramers that incorporated an electron acceptor were constructed by the co-assembly of a pyridine-appended zinc chlorophyll derivative, ZnPy, and a zinc chlorophyll derivative further decorated with a fullerene unit, ZnPyC60. Comprehensive steady-state and time-resolved spectroscopic studies were conducted for the individual tetramers of ZnPy and ZnPyC60 as well as their co-tetramers. Intra-assembly singlet energy transfer was confirmed by singlet-singlet annihilation in the ZnPy tetramer. Electron transfer from the singlet chlorin unit to the fullerene unit was clearly demonstrated by the transient absorption of the fullerene radical anion in the ZnPyC60 tetramer. Finally, with the co-tetramer, a coupled light-harvesting and charge-separation system with practically 100% quantum efficiency was demonstrated.
DOI
10.1002/chem.201503789
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자연과학대학 > 화학·나노과학전공 > Journal papers
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