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Keywords:

  • carbon nanotubes;
  • molecular recognition;
  • noncovalent interactions;
  • porphyrinoids;
  • supramolecular chemistry
Thumbnail image of graphical abstract

Like the tentacles of an octopus: Porphyrin oligomers bind strongly to single-walled carbon nanotubes, and debundle multitube aggregates. The strength of this interaction increases sharply with the number of porphyrin units in the oligomer, and the affinity is greatest for chiral (7,5) and (8,6) tubes. Quantitative information on these noncovalent recognition processes was obtained from UV/Vis/NIR absorption (see picture) and fluorescence titrations.