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Axially Substituted Silicon Phthalocyanine as Electron Donor in a Dyad and Triad with Azafullerene as Electron Acceptor for Photoinduced Charge Separation

Title
Axially Substituted Silicon Phthalocyanine as Electron Donor in a Dyad and Triad with Azafullerene as Electron Acceptor for Photoinduced Charge Separation
Authors
Rotas G.Martín-Gomis L.Ohkubo K.Fernández-Lázaro F.Fukuzumi S.Tagmatarchis N.Sastre-Santos Á.
Ewha Authors
Shunichi FukuzumiKei Okubo
SCOPUS Author ID
Shunichi Fukuzumiscopus; Kei Okuboscopus
Issue Date
2016
Journal Title
Chemistry - A European Journal
ISSN
0947-6539JCR Link
Citation
vol. 22, no. 42, pp. 15137 - 15143
Keywords
azafullerenedonor–acceptor systemsmaterials sciencephotoinduced electron transfersilicon phthalocyanine
Publisher
Wiley-VCH Verlag
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The synthesis of a donor–acceptor silicon phthalocyanine (SiPc)-azafullerene (C59N) dyad 1 and of the first acceptor–donor–acceptor C59N-SiPc-C59N dumbbell triad 2 was accomplished. The two C59N-based materials were comprehensively characterized with the aid of NMR spectroscopy, MALDI-MS as well as DFT calculations and their redox and photophysical properties were evaluated with CV and steady-state and time-resolved absorption and photoluminescence spectroscopy measurements. Notably, femtosecond transient absorption spectroscopy assays revealed that both dyad 1 and triad 2 undergo, after selective photoexcitation of the SiPc moiety, photoinduced electron transfer from the singlet excited state of the SiPc moiety to the azafullerene counterpart to produce the charge-separated state, with lifetimes of 660 ps, in the case of dyad 1, and 810 ps, in the case of triad 2. The current results are expected to have significant implications en route to the design of advanced C59N-based donor–acceptor systems targeting energy conversion applications. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
DOI
10.1002/chem.201603065
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자연과학대학 > 화학·나노과학전공 > Journal papers
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