Abstract
We describe here an efficient phase transfer of single wall carbon nanotubes (SWNTs) from aqueous to non-aqueous media using a unique amide functionalization route, where water soluble SWNTs (2.6 mg/mL) are effectively transferred to solvents like chloroform, toluene and CS2. A maximum of 30 wt% of oxygenated groups have been generated on the side walls by rapid microwave treatment, leading to a solubility of more than 2.6 mg/mL in water. Approximate surface amine coverage of 50% has been accomplished after oxalyl chloride treatment as inferred from thermogravimetry and X-ray photoelectron spectroscopy by controlling several key parameters associated with the extent of functionalization including purity of the sample, temperature and time.
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Dedicated to Prof. C N R Rao on his 75th birthday
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Kakade, B., Patil, S., Sathe, B. et al. Near-complete phase transfer of single-wall carbon nanotubes by covalent functionalization. J Chem Sci 120, 599–606 (2008). https://doi.org/10.1007/s12039-008-0091-3
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DOI: https://doi.org/10.1007/s12039-008-0091-3