Confined adamantane molecules assembled to one dimension in carbon nanotubes

Mingguang Yao, Patrik Stenmark, Edy Abou Hamad, Florian Nitze, Jian Qin, Christophe Goze-Bac, Thomas Wgberg*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

We have encapsulated adamantane (C10H16) in single- and multi-walled carbon nanotubes. Adamantane is a high symmetry cage like molecule with point group symmetry Td and can be considered as a hydrogen-terminated diamond fragment. We confirmed and identified the successful filling by high resolution transmission electron microscopy, 13C nuclear magnetic resonance, infrared and Raman spectroscopy. 13C nuclear magnetic resonance of the adamantane filled nanotubes reveals that the adamantane molecules stop rotating after encapsulation. A blue-shift of the Raman active radial breathing modes of the carbon nanotubes supports this and suggests a significant interaction between encapsulated adamantane molecules and the single wall nanotubes. The encapsulated adamantane molecules exhibit red shifted infrared C-H vibration modes which we assign to a slight elongation of the C-H bonds. We observe both a nanotube diameter dependence of the adamantane filling ratio and a release rate of adamantane from the CNTs that depends on the CNT diameters.

Original languageEnglish (US)
Pages (from-to)1159-1166
Number of pages8
JournalCarbon
Volume49
Issue number4
DOIs
StatePublished - Apr 1 2011

ASJC Scopus subject areas

  • Chemistry(all)

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