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Grimm B, Karnas E, Brettreich M, et al. Charge transfer in sapphyrin-fullerene hybrids employing dendritic ensembles. J Phys Chem B. 2009;114(45):14134-9doi: 10.1021/jp906785f.
Grimm, B., Karnas, E., Brettreich, M., Ohta, K., Hirsch, A., Guldi, D. M., Torres, T., & Sessler, J. L. (2010). Charge transfer in sapphyrin-fullerene hybrids employing dendritic ensembles. The journal of physical chemistry. B, 114(45), 14134-9. https://doi.org/10.1021/jp906785f
Grimm, Bruno, et al. "Charge transfer in sapphyrin-fullerene hybrids employing dendritic ensembles." The journal of physical chemistry. B vol. 114,45 (2010): 14134-9. doi: https://doi.org/10.1021/jp906785f
Grimm B, Karnas E, Brettreich M, Ohta K, Hirsch A, Guldi DM, Torres T, Sessler JL. Charge transfer in sapphyrin-fullerene hybrids employing dendritic ensembles. J Phys Chem B. 2010 Nov 18;114(45):14134-9. doi: 10.1021/jp906785f. Epub 2009 Nov 19. PMID: 19924884.
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J Phys Chem B. 2010 Nov 18;114(45):14134-9. doi: 10.1021/jp906785f. Epub 2009 Nov 19.

Charge transfer in sapphyrin-fullerene hybrids employing dendritic ensembles.

The journal of physical chemistry. B

Bruno Grimm, Elizabeth Karnas, Michael Brettreich, Kiminori Ohta, Andreas Hirsch, Dirk M Guldi, Tomas Torres, Jonathan L Sessler

Affiliations

  1. Department of Chemistry and Pharmacy and Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany.

PMID: 19924884 DOI: 10.1021/jp906785f

Abstract

A new approach to creating noncovalent charge transfer ensembles is described. It is based on two components that are linked through anion-receptor interactions. The first component is sapphyrin, a pentapyrrolic expanded porphyrin, which is capable of carboxylate anion recognition and more importantly can act as a photodonor when irradiated in the presence of a suitable electron acceptor. The second component is the electron acceptor and consists of one of two different C(60) fullerene cores functionalized with multiple carboxylate anion groups arranged in a dendritic fashion. Depending on the specific choice of the fullerene carboxylate anion dendrimer employed in ensemble construction, 1:1 or 1:2 complexes are formed when the C(60) cores are titrated with sapphyrin. The resulting noncovalent arrays undergo sapphyrin-to-fullerene electron transfer when irradiated with 387 nm light. This gives rise to charge separated states with lifetimes of ca. 470 and 600 ps in the case of the 1:1 and 1:2 sapphyrin-fullerene ensembles, respectively.

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