Grafting of oligo-N-vinyl carbazole on single walled carbon nanotubes

About Grafting of Single-Walled Carbon Nanotubes on the Oligo-N-Vinyl Carbazole and Copolymer Involving N-Vinylcarbazole and Hexylthiophene

“…This red shift can be attributed to the interaction between SWNTs and OVK as it is reported in the case of multiwalled carbon nanotubes (MWCNs) (Wu et al, 2007). It is interesting to note that in the spectral region varying from 400 to 2000 nm (Zaidi et al, 2010), the OVK/SWNTs composite's absorbance decreases gradually similarly to those of halogendoped PVK (Safoula et al, 1998). Similar effect has been also demonstrated in the case of SWNTs/Polyaniline obtained by an electro-synthesis process (Huang et al, 2003).…”

“…Peaks assignments are based on the previousely published results on the PVK or PVK/ SWNTs composites prepared by other procedure (Dobruchowska et al, 2008). However, the band intensitie variations relative to the present composite is recently described in our previous paper, aimed to the grafting reaction between OVK and SWNTs (Zaidi et al, 2010). In the case of chloroform, new bands appear at 1048,1064,1076,1133,1174,1297,1369,1718,1763 and 2873 cm -1 .…”

“…However, some differences are previously observed (Zaidi et al, 2010). It is recognized that annealing induces removal of solvent effect and more establishes the SWNTs functionalization.…”

“…As the processing of SWNTs is generally blocked by their insolubility in most common solvents (Fantini et al, 2009), only the lower concentrations in weight can achieve a good dispersion process of carbon nanotube in the case of OVK polymer. In fact, the composite OVK/SWNTs have been obtained using either chloroform or chlorobenzene solvent at different SWNTs concentrations (Zaidi et al, 2010, Zaidi et al, 2011. In this chapitre, we give only resuts of the optimal concentration reashing a good functionalization process wihin intreactif character.…”

“…Assignments of the full spectrum are strictly based on those of PVK, SWNTs and the composite PVK/SWNTs prepared by other procedure (Pei et al, 1999). The band intensity is however recently described (Zaidi et al, 2010, Zaidi et al, 2011. In both chloroform or chlorobenzene mediums, significant changes are clearly shown by adding SWNTs on the OVK spectrum.…”