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Vialla F, Delport G, Chassagneux Y, et al. Diameter-selective non-covalent functionalization of carbon nanotubes with porphyrin monomers. Nanoscale. 2016;8(4):2326-32doi: 10.1039/c5nr08023a.
Vialla, F., Delport, G., Chassagneux, Y., Roussignol, P., Lauret, J. S., & Voisin, C. (2016). Diameter-selective non-covalent functionalization of carbon nanotubes with porphyrin monomers. Nanoscale, 8(4), 2326-32. https://doi.org/10.1039/c5nr08023a
Vialla, F, et al. "Diameter-selective non-covalent functionalization of carbon nanotubes with porphyrin monomers." Nanoscale vol. 8,4 (2016): 2326-32. doi: https://doi.org/10.1039/c5nr08023a
Vialla F, Delport G, Chassagneux Y, Roussignol P, Lauret JS, Voisin C. Diameter-selective non-covalent functionalization of carbon nanotubes with porphyrin monomers. Nanoscale. 2016 Jan 28;8(4):2326-32. doi: 10.1039/c5nr08023a. PMID: 26750737.
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Nanoscale. 2016 Jan 28;8(4):2326-32. doi: 10.1039/c5nr08023a.

Diameter-selective non-covalent functionalization of carbon nanotubes with porphyrin monomers.

Nanoscale

F Vialla, G Delport, Y Chassagneux, Ph Roussignol, J S Lauret, C Voisin

Affiliations

  1. Laboratoire Pierre Aigrain, École Normale Supérieure, Université P. et M. Curie, Université Paris Diderot, CNRS, 75005 Paris, France. [email protected] [email protected].
  2. Laboratoire Aimé Cotton, CNRS, École Normale Supérieure de Cachan, Universite Paris Sud, 91405 Orsay, France.

PMID: 26750737 DOI: 10.1039/c5nr08023a

Abstract

We report on the spontaneous non-covalent functionalization of carbon nanotubes with hydrophobic porphyrin molecules in micellar aqueous solution. By monitoring the species concentrations with optical spectroscopies, we can follow the kinetics of the reaction and study its thermodynamical equilibrium as a function of the reagent concentrations. We show that the reaction is well accounted for by a cooperative Hill equation, reaching a molecular coverage close to a compact monolayer for a porphyrin concentration larger than a diameter-specific threshold concentration. The equilibrium constant is measured for 16 nanotube chiral species. The Gibbs energy of the reaction (of the order of -40 kJ mol(-1)) and its evolution with the nanotube diameter is consistent with theoretical calculations of the binding energy. This thermodynamical study shows a strong preferential binding of TPP molecules to larger diameter nanotubes. This original curvature selectivity can be used to induce diameter selective species enrichment.

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