Photoinduced electron transfer in a meso-linked Zn(II)porphyrin-Zn(II) phthalocyanine/C60-pyridyl supramolecular system
Urbani M, Osati S, Kuhri S, Guldi DM, Torres T (2013)
Publication Type: Journal article, Original article
Publication year: 2013
Journal
Original Authors: Urbani M., Osati S., Kuhri S., Guldi D.M., Torres T.
Publisher: Wiley-Blackwell: No OnlineOpen / World Scientific Publishing
Book Volume: 17
Pages Range: 501-510
DOI: 10.1142/S1088424613500302
Abstract
A non-covalent supramolecular complex combining porphyrin (Por), phthalocyanine (Pc) and fullerene [C], was obtained through zinc metal-pyridine coordination between a covalently meso-linked heterodimer ZnPor-ZnPc (4) and a N-pyridylfulleropyrrolidine derivative (5). The complexation was studied in toluene by absorption and fluorescence binding studies, and evidenced that the coordination of the N-pyridylfulleropyrrolidine (5) occurs preferentially through the zinc ion center of ZnPc (log K > 6.0) rather than ZnPor (log K = 5.23). Steady-state and time-resolved spectroscopies evidenced that upon selective excitation of either the Por, or the Pc moiety in [(ZnPor-ZnPc)∪C], the singlet excited state of Pc was generated efficiently in both cases (either from singlet-singlet energy transfer from Por* to Pc, or directly after selective excitation of the Pc moiety). Next, an electron transfer occurred from the Pc* to the C to generate the charge-separated specie [(ZnPor-ZnPc )∪C]. Finally, the back electron transfer afforded the Pc triplet excited state rather than the ground state. The introduction of a covalent meso-linkage between Por and Pc in the heterodimer 4 and in the supramolecular assembly 4∪5 induces appreciable differences toward the photo-induced processes and the binding constants in comparison with other β-covalently linked analogue systems. © 2013 World Scientific Publishing Company.
Authors with CRIS profile
Susanne Kuhri
Lehrstuhl für Physikalische Chemie I
Dirk Michael Guldi
Lehrstuhl für Physikalische Chemie I
Involved external institutions
Spain (ES)How to cite
APA:
Urbani, M., Osati, S., Kuhri, S., Guldi, D.M., & Torres, T. (2013). Photoinduced electron transfer in a meso-linked Zn(II)porphyrin-Zn(II) phthalocyanine/C60-pyridyl supramolecular system. Journal of Porphyrins and Phthalocyanines, 17, 501-510. https://doi.org/10.1142/S1088424613500302
MLA:
Urbani, Maxence, et al. "Photoinduced electron transfer in a meso-linked Zn(II)porphyrin-Zn(II) phthalocyanine/C60-pyridyl supramolecular system." Journal of Porphyrins and Phthalocyanines 17 (2013): 501-510.
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