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ChemComm
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DOI: 10.1039/C6CC06072B
COMMUNICATION
Journal Name
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,
We have successfully prepared, isolated, and characterized
[70]fullerene derivatives with a remarkable high isomeric
10 M. T. Dang, L. Hirsch, G. Wantz, J.D. Wuest, Chem. Rev.,
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purity in two different systems, namely
[70]DPM (including the X-ray structure of the
compound 5b). This new synthetic methodology to achieve
selectively -site-isomers is carried out under mild conditions
α-[70]PCBM and
α-
α
- derivative,
Zhang, D. J. Jones, A. B. Holmes, Chem. Mater., 2014, 26
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,
α
6
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using photoactivation. This unprecedented approach avoids
time- and solvent-consuming HPLC separations that are usually
employed to obtain these products. As it should be expected,
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therefore, the performance of the devices. According to our
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,
preliminary results, pure α-[70]PCBM and its isomeric mixture
14 a) M. R. Cerón, M. Izquierdo, Y. Pi, S. L. Atehortúa, L.
Echegoyen, Chem. Eur. J., 2015, 21, 7881. b) M. R. Cerón, M.
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obtained from commercial sources (Solenne) were tested in
BHJs solar cells showing a slightly beneficial influence in the
final device efficiency.
Acknowledgments
2015, 7, 16676. e) M. R. Cerón, M. Izquierdo, A. Aghabali, S.
P. Vogel, M. M Olmstead, A. L. Balch, L. Echegoyen, Carbon,
2016, 105, 394.
This work was supported by the European Research Council ERC-
320441-Chirallcarbon, Ministerio de Economía y Competitividad
(MINECO) of Spain (project CTQ2014-52045-R) and the CAM
(FOTOCARBON project S2013/MIT-2841). M.I. thanks to Ministerio
de Economía y Competitividad (MINECO) of Spain (Juan de la
Cierva-Incorporación IJCI-2014-19320). N. M. thanks to Alexander
von Humboldt Foundation.
15 For a discussion on site- and regio-selectivity, see: E. E.
Maroto, A. de Cózar, S. Filippone, A. Martín-Domenech, M.
Suárez, F. P. Cossío, N. Martín, Angew. Chem. Int. Ed., 2011,
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Notes and references
H. R. Lin, H. Ade, H. Yan, Nat. Commun., 2014, 5, 5293.
‡ Procedures, characterization, solar cells fabrication and
crystallographic data are included in the supporting information.
1
a) Y. Huang, E. J. Kramer, A. J. Heeger, G. C. Bazán, Chem.
Rev., 2014, 114, 7006. b) J. L. Delgado, P. A. Bouit, S.
4 | J. Name., 2012, 00, 1-3
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