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Self-assembly and photodetachment of aryl moieties from the covalently functionalized SWNTs were studied by temperature-dependent and UV Raman spectroscopic tools. The sidewall functionalized SWNTs were prepared via diazonium reactions from 4-bromoaniline and isoamyl nitrite. Raman spectra of the functionalized SWNTs were examined using ultraviolet excitations at 244 nm (5.08 eV) and 325 nm (4.82 eV) as well as visible irradiation at 633 nm (1.96 eV). The attached aryl moieties appeared to be removed by the UV irradiation as indicated from almost identical spectra with those of pristine SWNTs.
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KCS