Abstract
We have studied the interaction of benzonitrile with as-prepared and purified single-walled carbon nanotubes (SWCNTs). As-prepared SWCNTs, when suspended in benzonitrile, lead to a red colored dispersion which contains fragments composed mostly of amorphous carbon and carbon-coated catalyst, thus suggesting that benzonitrile is a solvent that can be used as one step of the purification process. Optical spectroscopic data (infrared, Raman, absorption) showed that purified carbon nanotubes interact weakly with benzonitrile. These experimental results are confirmed by first principles calculations that predict a very weak adsorption process through π–π interaction instead of through the free electron pair of the nitrile.
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Acknowledgments
AGSF acknowledge the Visiting Research grant 08/58194-7 from Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP). The authors acknowledge CENAPAD-SP for computer time and financial support from the Brazilian agencies CNPq, FUNCAP, CAPES-PROCAD, and FAPERGS. S·B. Fagan thanks L’Oréal for a Woman in Science Grant for 2006. This is a contribution of the Rede Nacional de Pesquisa em Nanotubos de Carbono (MCT/CNPq) and the Millenium Institute for Complex Materials (CNPq).
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Ferreira, O.P., Otubo, L., Aguiar, A.L. et al. Non-covalent interaction of benzonitrile with single-walled carbon nanotubes. J Nanopart Res 11, 2163–2170 (2009). https://doi.org/10.1007/s11051-009-9720-0
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DOI: https://doi.org/10.1007/s11051-009-9720-0