@article{10902/38106,
year = {2011},
month = {4},
url = {https://hdl.handle.net/10902/38106},
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 PPV-oligomers (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 PPV-oligomers 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.},
organization = {We are grateful to Eva M. Maya for GPC and TGA measurements. Financial support from the MICINN and MEC (Spain) (CTQ2008-00418/BQU, PLE2009-0070, and Consolider-Ingenio Nanociencia Molecular CSD2007-00010), Comunidad de Madrid (MADRISOLAR-2, S2009/PPQ/1533) and EU (MRTN-CT-2006-035533 Solar-N-type and Project ROBUST DSC FP7-Energy-2007-1-RTD, N  212792) is gratefully acknowledged. We are grateful to the Zentralinstitut für Neue Materialien und Prozesstechnik in F€urth for the possibility to perform AFM measurements and the Deutsche Forschungsgemeinschaft (SFB 583 and Clusters of Excellence Engineering of Advanced Materials).},
publisher = {Royal Society of Chemistry},
publisher = {Chemical Science, 2011, 2(4), 652-660},
title = {Tuning and optimizing the intrinsic interactions between phthalocyanine-based PPV oligomers and single-wall carbon nanotubes toward n-type/p-type},
author = {Bartelmess, Juergen and Ehli, Christian and Cid, Juan José and García Iglesias, Miguel and Vázquez, Purificación and Torres, Tomás and Guldi, Dirk M.},
}