A new approach for the photosynthetic antenna-reaction center complex with a model organized around an s-triazine linker
Kuhri S, Charalambidis G, Angaridis PA, Lazarides T, Pagona G, Tagmatarchis N, Coutsolelos AG, Guldi DM (2014)
Publication Type: Journal article, Original article
Publication year: 2014
Journal
Original Authors: Kuhri S., Charalambidis G., Angaridis P.A., Lazarides T., Pagona G., Tagmatarchis N., Coutsolelos A.G., Guldi D.M.
Publisher: Wiley-VCH Verlag
Book Volume: 20
Pages Range: 2049-2057
Journal Issue: 7
Abstract
Two new artificial mimics of the photosynthetic antenna-reaction center complex have been designed and synthesized (BDP-HP-C and BDP-ZnP-C). The resulting electron-donor/acceptor conjugates contain a porphyrin (either in its free-base form (HP) or as Zn-metalated complex (ZnP)), a boron dipyrrin (BDP), and a fulleropyrrolidine possessing, as substituent of the pyrrolidine nitrogen, an ethylene glycol chain terminating in an amino group C-X-NH (X=spacer). In both cases, the three different components were connected by s-triazine through stepwise substitution reactions of cyanuric chloride. In addition to the facile synthesis, the star-type arrangement of the three photo- and redox-active components around the central s-triazine unit permits direct interaction between one another, in contrast to reported examples in which the three components are arranged in a linear fashion. The energy- and electron-transfer properties of the resulting electron-donor/acceptor conjugates were investigated by using UV/Vis absorption and emission spectroscopy, cyclic voltammetry, and femtosecond transient absorption spectroscopy. Comparison of the absorption spectra and cyclic voltammograms of BDP-HP-C and BDP-ZnP-C with those of BDP-HP, BDP-ZnP and BDP-C, which were used as references, showed that the spectroscopic and electrochemical properties of the individual constituents are basically retained, although some appreciable shifts in terms of absorption indicate some interactions in the ground state. Fluorescence lifetime measurements and transient absorption experiments helped to elucidate the antenna function of BDP, which upon selective excitation undergoes a rapid and efficient energy transfer from BDP to HP or ZnP. This is then followed by an electron transfer to C, yielding the formation of the singlet charge-separated states, namely BDP-HP-C and BDP-ZnP-C. As such, the sequence of energy transfer and electron transfer in the present models mimics the events of natural photosynthesis. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Authors with CRIS profile
Susanne Kuhri
Lehrstuhl für Physikalische Chemie I
Dirk Michael Guldi
Lehrstuhl für Physikalische Chemie I
Involved external institutions
University of Crete / Πανεπιστήμιο Κρήτης
Greece (GR)
University of Ioannina / Πανεπιστήμιο Ιωαννίνων
Greece (GR)
National Hellenic Research Foundation (NHRF) / Εθνικό Ίδρυμα Ερευνών
Greece (GR)
Greece (GR)
University of Ioannina / Πανεπιστήμιο Ιωαννίνων
Greece (GR)
National Hellenic Research Foundation (NHRF) / Εθνικό Ίδρυμα Ερευνών
Greece (GR)
How to cite
APA:
Kuhri, S., Charalambidis, G., Angaridis, P.A., Lazarides, T., Pagona, G., Tagmatarchis, N.,... Guldi, D.M. (2014). A new approach for the photosynthetic antenna-reaction center complex with a model organized around an s-triazine linker. Chemistry - A European Journal, 20(7), 2049-2057. https://dx.doi.org/10.1002/chem.201302632
MLA:
Kuhri, Susanne, et al. "A new approach for the photosynthetic antenna-reaction center complex with a model organized around an s-triazine linker." Chemistry - A European Journal 20.7 (2014): 2049-2057.
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