Basic hydrolysis of fullerene-based esters: a tiny step away from nucleophilic addition to fullerene

Abstract

Direct nucleophilic addition of -OH groups on the C 60 skeleton in the basic hydrolysis of ethyl ester of T h -symmetric fullerenehexamalonic acid (T h -FHMA), leading to the formation of a hybrid with features of T h -FHMA and fullerenol, has been observed as an important side reaction. The hydroxylation takes place at considerably milder conditions as those usually used in the synthesis of C 60 fullerenols. UV/Vis and IR spectroscopy were successfully used as a fast monitoring tool which might be of help also in other investigations where additions on C 60 skeleton of molecules with distinct absorption spectra take place.

Bioactivity Study of the C60-L-Threonine Derivative for Potential Application in Agriculture

“…The absorbance spectrum ( Figure 3) of individual fullerene C 60 consists of a maximum at a wavelength of 335 nm and agrees well with the literature data [68]. In turn, the electron spectrum of C 60 -Thr does not contain an absorption maximum, which also agrees well with the literature data obtained for polyhydroxylated and carboxylated fullerene derivatives [69][70][71], as well as derivatives with amino acids [37].…”