Screening interactions of zinc phthalocyanine–PPV oligomers with single wall carbon nanotubes—a comparative study

In this paper, the ability to disperse single wall carbon nanotubes (SWNT) of several different-nature poly(p-phenylene vinylene) (PPV) oligomers having pendant zinc phthalocyanines (ZnPc) has been investigated. Based on the quenching of the ZnPc and SWNT fluorescence in the supramolecular assemblie...

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Bibliographic Details
Published in:Journal of materials chemistry 2011-01, Vol.21 (22), p.8014-8020
Main Authors: Bartelmess, Juergen, Ehli, Christian, Cid, Juan-José, García-Iglesias, Miguel, Vázquez, Purificación, Torres, Tomás, Guldi, Dirk M.
Format: Article
Language:English
Subjects:
Backbone
Carbon
Charge transfer
Nanostructure
Oligomers
Polyphenylene vinylene
Single wall carbon nanotubes
Zinc
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Summary:In this paper, the ability to disperse single wall carbon nanotubes (SWNT) of several different-nature poly(p-phenylene vinylene) (PPV) oligomers having pendant zinc phthalocyanines (ZnPc) has been investigated. Based on the quenching of the ZnPc and SWNT fluorescence in the supramolecular assemblies, it has been shown that parameters such as p/n-type character of the oligomer, size and the distance between the ZnPc moiety and the conjugated backbone play an important role in the strength of the interactions. Important results suggest that n-type oligomers as well as certain flexibility in the phthalocyanine arrangement are breakthroughs for immobilizing SWNT in THF, affording stable and homogeneous suspensions. Transient absorption measurements confirm that upon photoexcitation the photoexcited ZnPc triggers an intraensemble charge transfer to yield oxidized ZnPc and reduced SWNT.
ISSN:0959-9428
1364-5501
DOI:10.1039/c1jm10572h