Tuning and optimizing the intrinsic interactions between phthalocyaninebased PPV oligomers and single-wall carbon nanotubes toward n-type/p-type
Bartelmeß J, Ehli C, Cid JJ, Garcia-Iglesias M, Vazquez P, Torres T, Guldi DM (2011)
Publication Type: Journal article, Original article
Publication year: 2011
Journal
Original Authors: Bartelmeß J., Ehli C., Cid J.-J., Iglesias M.G., Vazquez P., Torres T., Guldi D.M.
Publisher: Royal Society of Chemistry
Book Volume: 2
Pages Range: 652-660
Journal Issue: 4
DOI: 10.1039/c0sc00364f
Abstract
In this work we have developed a strategy to immobilize functional groups such as ZnPc onto the surface of SWNT without, however, the needs of covalent functionalization, using substituted PPVoligomers (1-4) with different electronic character. The complementary use of a series of microscopies and spectroscopies is central, especially to gather a comprehensive picture of the mutual interactions. Importantly, only 1, bearing electron-withdrawing CN substituents, interacts tightly with SWNT affording stable and finely dispersed SWNT suspensions. 2-4, on the other hand, fail to disperse SWNT in THF following our newly developed protocol. A likely rationale is the p-type character of PPVoligomers 2-4, which imposes repelling forces relative to p-type SWNT, while placing CN groups yields n-type PPV-oligomer 1 and, in turn, strengthens the π-π interactions with SWNT. Photoexcitation of SWNT/1 hybrids generates a metastable radical ion pair state, namely oxidized ZnPc and reduced SWNT. Quite remarkable is the ratio of charge separation to charge recombination, namely nearly 3 orders of magnitude, which is encouraging to fabricate photovoltaic cells that are based, for example, on different nanocarbons. © The Royal Society of Chemistry 2011.
Authors with CRIS profile
Jürgen Bartelmeß
Graduiertenzentrum der FAU
Christian Ehli
Lehrstuhl für Physikalische Chemie I
Dirk Michael Guldi
Lehrstuhl für Physikalische Chemie I
Involved external institutions
Spain (ES)How to cite
APA:
Bartelmeß, J., Ehli, C., Cid, J.-J., Garcia-Iglesias, M., Vazquez, P., Torres, T., & Guldi, D.M. (2011). Tuning and optimizing the intrinsic interactions between phthalocyaninebased PPV oligomers and single-wall carbon nanotubes toward n-type/p-type. Chemical Science, 2(4), 652-660. https://doi.org/10.1039/c0sc00364f
MLA:
Bartelmeß, Jürgen, et al. "Tuning and optimizing the intrinsic interactions between phthalocyaninebased PPV oligomers and single-wall carbon nanotubes toward n-type/p-type." Chemical Science 2.4 (2011): 652-660.
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