Grafting of 4-(2,4,6-Trimethylphenoxy)benzoyl onto Single-Walled Carbon Nanotubes in Poly(phosphoric acid) via Amide Function
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- Grafting of 4-(2,4,6-Trimethylphenoxy)benzoyl onto Single-Walled Carbon Nanotubes in Poly(phosphoric acid) via Amide Function
- Han, Sang-Wook; Oh, Se-Jin; Tan, Loon-Seng; Baek, Jong-Beom
- Benzamide; Carbon particle; Commercial grade; Friedel-crafts acylation; Functionalization; Functionalized; Grafting; Model compound; Phosphorous pentoxide; Polyphosphoric acid; Scanning electrons
- Issue Date
- NANOSCALE RESEARCH LETTERS, v.4, no.7, pp.766 - 772
- Single-walled carbon nanotubes (SWCNTs), which were commercial grade containing 60-70 wt% impurity, were treated in a mild poly(phosphoric acid) (PPA). The purity of PPA treated SWCNTs was greatly improved with or without little damage to SWCNTs framework and stable crystalline carbon particles. An amide model compound, 4-(2,4,6-trimethylphenoxy)benzamide (TMPBA), was reacted with SWCNTs in PPA with additional phosphorous pentoxide as "direct" Friedel-Crafts acylation reaction to afford TMPBA functionalized SWCNTs. All evidences obtained from Fourier-transform infrared spectroscopy, Raman spectroscopy, thermogravimetric analysis, scanning electron microcopy, and transmission electron microscopy strongly supported that the functionalization of SWCNTs with benzamide was indeed feasible.
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