Covalent Grafting of BPin functions on Carbon Nanotubes and Chan-Lam-Evans Post-Functionalization
| Autor: | Claude Poleunis, Sophie Hermans, Olivier Riant, Antonin Desmecht, Debobrata Sheet |
|---|---|
| Přispěvatelé: | UCL - SST/IMCN/MOST - Molecules, Solids and Reactivity |
| Rok vydání: | 2018 |
| Předmět: |
Thermogravimetric analysis
Nucleophilic addition 010405 organic chemistry Chemistry Organic Chemistry Heteroatom General Chemistry Carbon nanotube 010402 general chemistry Grafting 01 natural sciences Catalysis 0104 chemical sciences law.invention X-ray photoelectron spectroscopy Covalent bond law Polymer chemistry Surface modification |
| Zdroj: | Chemistry-A European Journal, Vol. 25, no.6, p. 1436-1440 (2018) |
| ISSN: | 1521-3765 |
| Popis: | The chemical functionalization of carbon nanotubes is often a prerequisite prior to their use in various applications. The covalent grafting of 4,4,5,5-tetramethyl-1,3,2-dioxaborolane (BPin) functional groups directly on the surface of multi- and single-walled carbon nanotubes, activated by nucleophilic addition of nBuLi, was carried out. Thermogravimetric analysis (TGA) coupled with mass spectrometry, Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ions mass spectrometry (ToF-SIMS) confirmed the efficiency of this methodology and proved the integrity and covalent grafting of the BPin functional groups. These groups were further reacted with various nucleophiles in the presence of a copper(II) source in the conditions of the aerobic Chan-Lam-Evans coupling. The resulting materials were characterized by TGA, XPS and ToF-SIMS. This route is efficient, reliable and among the scarce reactions that enable the direct grafting of heteroatoms at carbonaceous material surfaces. |
| Databáze: | OpenAIRE |
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