Mass-spectrometric study of single walled carbon nanotubes modified by aliphatic amines
Анотація
The gas-phase derivatization procedure was employed for direct (i.e., without chemical activation of terminal carboxylic groups) amidization of oxidized single-walled carbon nanotubes (SWNTs) with simple aliphatic amines. The procedure includes treatment of SWNTs with amine vapors under reduced pressure and temperature of 160-170ºC. Applicability of temperature-programmed desorption mass spectrometry for chemical characterization of the derivatized SWNTs was analyzed. Heating of the amine-treated SWNTs at temperature >200ºC causes cleavage of alkenes from the amine residues: nonene and pentene are formed in the case of nonylamine and dipentylamine, respectively.
Посилання
Wong S.S., Joselevich E., Woolley A.T., Cheung C.L., and Lieber C.M. Covalently functionalized nanotubes as nanometre-sized probes in chemistry and biology // Nature. – 1998. - V.394. - Р.52-55
Chen J., Hamon M.A., Hu H., Chen Y.S., Rao A.M., Eklund P.C., and Haddon R.C. Solution properties of single-walled carbon nanotubes // Science. - 1998. - V.282. - Р.95-98.
Liu Z.F., Shen Z.Y., Zhu T., Hou S.F., Ying L.Z., Shi Z.J., and Gu Z.N. Organizing single-walled carbon nanotubes on gold using a wet chemical self-assembling technique // Lalgmuir. - 2000. - V.16. - Р.3569-3573.
Basiuk V.A. and Chuiko A.A. Gas-phase synthesis of alkylamide sorbents for high‑performance liquid chromatography // Doklady AN SSSR. - 1989. - V.309. - P.381‑384.
Basiuk V.A. and Chuiko A.A. Gas-phase synthesis, properties and some applications of acylamide stationary phases for high-performance liquid chromatography // J. Chromatogr. - 1990. - V.521. - Р.29-42.
Basiuk V.A. and Khil'chevskaya E.G. Gas-phase acylation of aminopropyl silica gel in the synthesis of some chemically bonded silica materials for analytical applications // Anal. Chim. Acta. - 1991. - V.255. - Р.197-205.
Gunko V.M. and Pokrovskiy V.A. Temperature-programmed desorption mass spectrometry of butyloxysilyl groups on silica surfaces // Int. J. Mass Spectrom. Ion Proc. - 1995. - V.148. - Р.45-54.
Pokrovskiy V.A., Leboda R., Turov V.V., Charmas B., and Ryczkowski J. Temperature‑programmed desorption mass spectrometry of carbonized silica surface // Carbon. - 1999. - V.37. - Р.1039-1047.
Pokrovskiy V.A. Temperature-programmed desorption mass spectrometry // J. Therm. Anal. Cal. - 2000. - V.62. - Р.407-415.
Figueiredo J.L., Pereira M.F.R., and Freitas M.M.A. Modification of the surface chemistry of activated carbons // Carbon. - 1999. - V.37. - Р.1379-1389.