CONVERSION OF ANILINE TO AZOBENZENE AT FUNCTIONALIZED CARBON NANOTUBES: A POSSIBLE CASE OF A NANODIMENSIONAL REACTION

Citation data:

International Journal of Nanoscience, ISSN: 0219-581X, Vol: 01, Issue: 03n04, Page: 285-293

Publication Year:
2002
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Repository URL:
http://scholarworks.rit.edu/article/1096
DOI:
10.1142/s0219581x02000255
Author(s):
Croston, M.; Langston, J.; Takacs, Gerald A; Morrill, Terence C.; Miri, Massoud; Santhanam, K.S.V.; Ajayan, Pulickel
Publisher(s):
World Scientific Pub Co Pte Lt
Tags:
Aniline; Azobenzene; Azoxybenzene; Carbon nanotube; GC/MS; Hydrogen peroxide; Nitrobenzene; Nitrosobenzene; TEM; TGA
article description
Aniline is oxidized to nitrosobenzene as the initial product, which undergoes further oxidation to nitrobenzene. The nitrosobenzene formation is catalyzed by functionalized multiwalled carbon nanotubes (CNT) followed by a coupling reaction between nitrosobenzene and aniline to produce azobenzene. This coupling requires close proximity of the reactants. It proceeds rapidly resulting in the UV-VIS absorption spectrum showing maxima at 327 nm and 425 nm. The nitrosobenzene yield in the presence of CNTs is controlled by the amount present in the medium. As the reaction is not catalyzed by unfunctionalized CNTs or graphitic particles, the uniqueness of the functionalized multiwalled CNTs in this catalysis suggests a nanodimensional reaction pathway.