The dispersions of SWNTs were prepared by using non-covalent interactions of poly(pyridinium salt)s in dimethyl sulfoxide (DMSO). These dispersions were characterized by using a number of experimental techniques. These techniques included UV-Vis absorption, photoluminescence, 1H NMR spectroscopy, transmission electron, and polarizing optical microscopy.  The results supported that there existed strong p�p and cation�p interactions between this class of ionic polymers and SWNTs. These interactions are responsible for the high-concentration dispersions of SWNTs in these ionic polymers. The 1H NMR spectra of these dispersions also revealed strong p�p interactions causing the broadening and reduced intensity of  proton signals in their spectra when compared with those of ionic polymers. These non-covalent interactions of SWNTs with ionic polymers allow the convenient preparation of a new family of SWNT/ionic polymer dispersions, which can ultimately find broad applications as new high-performance materials.

High-concentration dispersions of single-walled carbon nanotubes with poly(pyridinium salt)s

241st National Meeting (2011)

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