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


Por: Alzate-Carvajal, Natalia, Basiuk, Elena V., Meza-Laguna, Victor, Puente-Lee, Ivan, Farias, Mario H., Bogdanchikova, Nina, Basiuk, Vladimir A.

Publicada: 1 ene 2016
Resumen:
We attempted amide functionalization of the carboxylic groups present in graphene oxide (GO) and nanodiamond (ND) by means of a solvent-free gas-phase treatment with two aromatic amines 1-aminopyrene (AP) and 2-aminofluorene (AF), and also with one aliphatic amine, 1-octadecylamine (ODA), for comparison. The procedure was carried out under moderate vacuum, at temperatures of 150-180 °C, using short reaction times of about 2 h. The amine treatment generally gave rise to changes in Fourier-transform infrared (FTIR), Raman, ultraviolet-visible, and X-ray photoelectron spectra (XPS), to a variable degree depending on the particular sample. Thermogravimetric analysis showed the highest amine content for GO and ND treated with ODA, which turned out to be roughly one order of magnitude higher than in the case of aromatic AF and AP. Considerable changes in sample morphology after functionalization were observed by transmission electron and atomic force microscopy. Based on the analysis of FTIR and XPS spectra, we concluded that amidation is the only possible route for ND functionalization with AF, AP and ODA, whereas we found spectroscopic evidence for an alternative reaction channel on GO sheets, which is amine addition onto epoxy bridges. © The Royal Society of Chemistry.

Filiaciones:
Alzate-Carvajal, Natalia:
 Univ Nacl Autonoma Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Circuito Exterior CU, Ciudad De Mexico 04510, Mexico

Basiuk, Elena V.:
 Univ Nacl Autonoma Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Circuito Exterior CU, Ciudad De Mexico 04510, Mexico

Meza-Laguna, Victor:
 Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Circuito Exterior CU, Ciudad De Mexico 04510, Mexico

Puente-Lee, Ivan:
 Univ Nacl Autonoma Mexico, Fac Quim, Circuito Exterior CU, Ciudad De Mexico 04510, Mexico

Farias, Mario H.:
 Univ Nacl Autonoma Mexico, Ctr Nanociencias & Nanotecnol, Apdo Postal 14, Ensenada 22800, Baja California, Mexico

Bogdanchikova, Nina:
 Univ Nacl Autonoma Mexico, Ctr Nanociencias & Nanotecnol, Apdo Postal 14, Ensenada 22800, Baja California, Mexico

Basiuk, Vladimir A.:
 Univ Nacl Autonoma Mexico, Inst Ciencias Nucl, Circuito Exterior CU, Ciudad De Mexico 04510, Mexico
ISSN: 20462069
Editorial
Royal Society of Chemistry, THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND, Reino Unido
Tipo de documento: Article
Volumen: 6 Número: 114
Páginas: 113596-113610
WOS Id: 000389905300099