TY - JOUR
T1 - Efficient direct water-solubilisation of single-walled carbon nanotube derivatives
AU - Arrais, Aldo
AU - Boccaleri, Enrico
AU - Diana, Eliano
N1 - Funding Information:
Fund grant from the Ministero dell’Istruzione, Università e Ricerca (MIUR) is thankfully acknowledged. Authors are grateful to Prof. Antonino Pollicino, Dr. Alice Orestano (XPS, Dip. Metod. Fis. Chim. Ing., University of Catania, Italy), and Dr. Valentina Gianotti (ESI-MS, DISTA, University of Piemonte Orientale, Italy) for their assistance.
PY - 2004/11
Y1 - 2004/11
N2 - Application under mild conditions of a one-pot reductive-oxidative synthetic protocol to single-walled carbon nanotubes (SWNT) affords water-soluble oxygenated products that have been characterised by mean of XPS, solution 1H-NMR, UV-VIS-NIR, vibrational FTIR and Raman, SEM-energy dispersive x-ray (EDX), XRD, and ESI-MS techniques. Different oxygenated functionalities are evicted to be covalently bonded to carbon nanotubes frameworks, due to electrophilic insertion of O2 upon reduced carbon structures. The pH-dependent behaviour in water solution and the observed partial fragmentation of oxidised nanotubes, that can contribute in enhancing water solubility by shortening structures, are discussed. Prolonged heating of the material affords a higher graphitisation index of the functionalised carbonaceous watersoluble frameworks, and possible chemical paths for the partial recovering of pristine carbon nanostructures are reported. The achieved hydrophily due to polar oxygen moieties insertions on nanostructures provides a remarkable unprecedented water solubility for these carbon substrates without the attachment of large polar appendages.
AB - Application under mild conditions of a one-pot reductive-oxidative synthetic protocol to single-walled carbon nanotubes (SWNT) affords water-soluble oxygenated products that have been characterised by mean of XPS, solution 1H-NMR, UV-VIS-NIR, vibrational FTIR and Raman, SEM-energy dispersive x-ray (EDX), XRD, and ESI-MS techniques. Different oxygenated functionalities are evicted to be covalently bonded to carbon nanotubes frameworks, due to electrophilic insertion of O2 upon reduced carbon structures. The pH-dependent behaviour in water solution and the observed partial fragmentation of oxidised nanotubes, that can contribute in enhancing water solubility by shortening structures, are discussed. Prolonged heating of the material affords a higher graphitisation index of the functionalised carbonaceous watersoluble frameworks, and possible chemical paths for the partial recovering of pristine carbon nanostructures are reported. The achieved hydrophily due to polar oxygen moieties insertions on nanostructures provides a remarkable unprecedented water solubility for these carbon substrates without the attachment of large polar appendages.
KW - Single-walled carbon nanotubes
KW - Solid-state spectroscopy
KW - Water solubility
UR - http://www.scopus.com/inward/record.url?scp=10044242786&partnerID=8YFLogxK
U2 - 10.1081/FST-200032896
DO - 10.1081/FST-200032896
M3 - Review article
SN - 1536-383X
VL - 12
SP - 789
EP - 809
JO - Fullerenes Nanotubes and Carbon Nanostructures
JF - Fullerenes Nanotubes and Carbon Nanostructures
IS - 4
ER -