Spectral and chemical evidence for the direct formation of carboxylic groups in aerobically oxidised water-soluble fullerenes

Aldo Arrais, Eliano Diana, Rosanna Rossetti, Enrico Boccaleri

Risultato della ricerca: Contributo su rivistaArticolo in rivistapeer review

Abstract

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.

Lingua originaleInglese
pagine (da-a)2502-2510
Numero di pagine9
RivistaCarbon
Volume45
Numero di pubblicazione13
DOI
Stato di pubblicazionePubblicato - nov 2007

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