Coordinative interactions between porphyrins and C60, La@C 82, and La2@C80
Tsuchiya T, Rudolf M, Wolfrum S, Radhakrishnan SG, Aoyama R, Yokosawa Y, Oshima A, Akasaka T, Nagase S, Guldi DM (2013)
Publication Type: Journal article, Original article
Publication year: 2013
Journal
Original Authors: Tsuchiya T., Rudolf M., Wolfrum S., Radhakrishnan S.G., Aoyama R., Yokosawa Y., Oshima A., Akasaka T., Nagase S., Guldi D.M.
Publisher: Wiley-VCH Verlag
Book Volume: 19
Pages Range: 558-565
Journal Issue: 2
Abstract
For the first time, a C derivative (1) and two different lanthanum metallofullerene derivatives, La@CPy (2) and La @CPy (3), that feature a pyridyl group as a coordination site for transition-metal ions have been synthesized and integrated as electron acceptors into coordinative electron-donor/electron-acceptor hybrids. Zinc tetraphenylporphyrin (ZnP) served as an excited-state electron donor in this respect. Our investigations, by means of steady-state and time-resolved photophysical techniques found that electron transfer governs the excited-state deactivation in all of these systems, namely 1/ZnP, 2/ZnP, and 3/ZnP, whereas, in the ground state, notable electronic interactions are lacking. Variation of the electron-accepting fullerene or metallofullerene moieties provides the incentive for fine-tuning the binding constants, the charge-separation kinetics, and the charge-recombination kinetics. To this end, the binding constants, which ranged from log K=3.94-4.38, are dominated by axial coordination, with minor contributions from the orbital overlap of the curved and planar π systems. The charge-separation and charge-recombination kinetics, which are in the order of 10 and 10 s, relate to the reduction potential of the fullerene and metallofullerenes, respectively. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Authors with CRIS profile
Marc Rudolf
Lehrstuhl für Physikalische Chemie I
Silke Wolfrum
Lehrstuhl für Physikalische Chemie I
Dirk Michael Guldi
Lehrstuhl für Physikalische Chemie I
Involved external institutions
Japan (JP)How to cite
APA:
Tsuchiya, T., Rudolf, M., Wolfrum, S., Radhakrishnan, S.G., Aoyama, R., Yokosawa, Y.,... Guldi, D.M. (2013). Coordinative interactions between porphyrins and C60, La@C 82, and La2@C80. Chemistry - A European Journal, 19(2), 558-565. https://doi.org/10.1002/chem.201202661
MLA:
Tsuchiya, Takahiro, et al. "Coordinative interactions between porphyrins and C60, La@C 82, and La2@C80." Chemistry - A European Journal 19.2 (2013): 558-565.
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