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Issue 24, 2008
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Interactions between tripodal porphyrin hosts and single walled carbon nanotubes: an experimental and theoretical (DFT) account

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Abstract

We describe a strategy for dispersing single walled nanotubes (SWNTs) in organic solvents using supramolecular coating with tailor-made, structurally adjustable tripodal porphyrin receptors. These have the ability to recognise SWNTs from DMF–toluene mixtures. HR TEM, TM AFM and SEM measurements showed that the hosts wrap around individual arc-made SWNTs, giving monodispersed composites in DMF which are stable for weeks. The dispersed composites were studied by Raman and fluorescence spectroscopies, including laser scanning confocal microscopy (for aggregates incorporated in cells). These porphyrin hosts encapsulate SWNTs based on π–π type interactions in an analogous manner to those observed by single crystal X-ray diffraction in their C60 complexes. These interactions may be further reinforced by porphyrinporphyrin stacking. Density functional theory (DFT) calculations predicted the structure of the SWNT : porphyrin host complex or composite formed and the binding energies of tripodal porphyrin hosts in composites with either C60 or SWNT as guests.

Graphical abstract: Interactions between tripodal porphyrin hosts and single walled carbon nanotubes: an experimental and theoretical (DFT) account

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Publication details

The article was received on 18 Dec 2007, accepted on 21 Feb 2008 and first published on 26 Mar 2008


Article type: Paper
DOI: 10.1039/B719494C
Citation: J. Mater. Chem., 2008,18, 2781-2788
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    Interactions between tripodal porphyrin hosts and single walled carbon nanotubes: an experimental and theoretical (DFT) account

    S. I. Pascu, N. Kuganathan, L. H. Tong, R. M. J. Jacobs, P. J. Barnard, B. T. Chu, Y. Huh, G. Tobias, C. G. Salzmann, J. K. M. Sanders, M. L. H. Green and J. C. Green, J. Mater. Chem., 2008, 18, 2781
    DOI: 10.1039/B719494C

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