TY - JOUR
T1 - Spectral and chemical evidence for the direct formation of carboxylic groups in aerobically oxidised water-soluble fullerenes
AU - Arrais, Aldo
AU - Diana, Eliano
AU - Rossetti, Rosanna
AU - Boccaleri, Enrico
PY - 2007/11
Y1 - 2007/11
N2 - The synthesis of oxidised water-soluble fullerenes, prepared by chemically-induced aerobic oxidation, yields functionalised carbon cluster structures, which are oxidised by the covalent insertion of different oxygen units. Their strictly pH-dependent behaviour in aqueous solutions appears to be properly ascribed to the existence of directly attached carboxylic moieties. The presence of these groups, which are usually neglected and underestimated, has been thoroughly investigated. Several concurrent spectral (UV-VIS, XPS, solid-state 13C CPMAS NMR, FT-IR, Raman, EDAX, TGA-MS, ESI-MS) and chemical (acid-base behaviour, salt precipitation by metal-complexation, carboxylic functionalisation) methods have provided a definitive set of consistent evidence, indicating for the first time the direct linkage of carboxylic groups on water-soluble fullerenes prepared in this manner.
AB - The synthesis of oxidised water-soluble fullerenes, prepared by chemically-induced aerobic oxidation, yields functionalised carbon cluster structures, which are oxidised by the covalent insertion of different oxygen units. Their strictly pH-dependent behaviour in aqueous solutions appears to be properly ascribed to the existence of directly attached carboxylic moieties. The presence of these groups, which are usually neglected and underestimated, has been thoroughly investigated. Several concurrent spectral (UV-VIS, XPS, solid-state 13C CPMAS NMR, FT-IR, Raman, EDAX, TGA-MS, ESI-MS) and chemical (acid-base behaviour, salt precipitation by metal-complexation, carboxylic functionalisation) methods have provided a definitive set of consistent evidence, indicating for the first time the direct linkage of carboxylic groups on water-soluble fullerenes prepared in this manner.
UR - http://www.scopus.com/inward/record.url?scp=35348910214&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2007.08.027
DO - 10.1016/j.carbon.2007.08.027
M3 - Article
SN - 0008-6223
VL - 45
SP - 2502
EP - 2510
JO - Carbon
JF - Carbon
IS - 13
ER -