Solvent-free one-step covalent functionalization of graphene oxide and nanodiamond with amines

摘要: We attempted amide functionalization of the carboxylic groups present in graphene oxide (GO) and nanodiamond (ND) by means a solvent-free gas-phase treatment with two aromatic amines 1-aminopyrene (AP) 2-aminofluorene (AF), also one aliphatic amine, 1-octadecylamine (ODA), for comparison. The procedure was carried out under moderate vacuum, at temperatures 150–180 °C, using short reaction times about 2 h. amine generally gave rise to changes Fourier-transform infrared (FTIR), Raman, ultraviolet-visible, X-ray photoelectron spectra (XPS), variable degree depending on particular sample. Thermogravimetric analysis showed highest content GO ND treated ODA, which turned be roughly order magnitude higher than case AF AP. Considerable sample morphology after were observed transmission electron atomic force microscopy. Based FTIR XPS spectra, we concluded that amidation is only possible route AF, AP whereas found spectroscopic evidence an alternative channel sheets, addition onto epoxy bridges.