ORGN 309 |
| Yubing Wang, Chemistry and Environmental Science, New Jersey Institute of Technology, 161 Warren Street, Newark, NJ 07102, Sanjay V. Malhotra, Chemistry & Environmental Science, New Jersey Institute of Technology, 384 Teirnan Hall, University Heights, Newark, NJ 07102-1982, and Zafar Iqbal, Chemistry and Environmental Science, Professor, New Jersey Institute of Technology, 138 Warren Street, Newark, NJ 07102. |
| Self-assembled sheets of laser-synthesized single wall carbon nanotubes (SWNTs) were used as the working electrode in an electrochemical cell together with a saturated calomel reference electrode and nickel (or platinum) foil as the counter electrode. With 6M KNO2 as electrolyte, the SWNT sheets were positively charged at +1.2 to about +3.0 volts for 3 to 10 hrs. In-situ characterization of the electrochemical processes was carried out by cyclic voltammetry. Ex-situ Fourier transform infrared (FTIR) in combination with attenuated total internal reflection and Raman spectroscopy were used to characterize the SWNTs for the presence of NO2 on the tube sidewalls. More than 13-wt% uptake of NO2 was indicated by thermo-gravimetric analysis (TGA), while the vibrational spectroscopic data indicated covalent attachment of NO2 to the SWNT sidewalls. Differential thermal analysis (DTA) showed the onset of an endothermic process associated possibly with carbon-nitrogen bond dissociation at about 425 °C. The potential application of nitro-group functionalized SWNTs as nanoscale energetic materials, will be briefly discussed.
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Molecular Recognition and Materials
8:00 AM-12:00 PM, Tuesday, August 24, 2004 Pennsylvania Convention Center -- 201B, Oral
Division of Organic Chemistry |