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J Org Chem. 2000 Dec 15;65(25):8675-84.

Synthesis and properties of isoxazolo[60]fullerene-donor dyads.

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  • 1Facultad de Ciencias del Medio Ambiente, Facultad de Ciencias Químicas, and Escuela de Ingenieros Técnicos Industriales, Universidad de Castilla-La Mancha, 45071 Toledo, Spain. flanga@amb-to.uclm.es


A series of isoxazolo[60]fullerenes has been prepared in one pot from aldoximes under microwave irradiation. Several donors and acceptors were used as substituents. The absorption and emission spectra of these compounds in polar solvents suggest a weak charge-transfer interaction between the oxygen atom of the isoxazoline moiety and the C(60) cage, as well as a stronger interaction between the donor and the fullerene cage when the attached groups are p-N,N-dimethylaniline or ferrocene. The electrochemical properties of the compounds were investigated and they show the same or better acceptor character than C(60) in all cases. Theoretical calculations support the results obtained. Solvent effects in the (1)H NMR spectra have been determined and provide useful information concerning the polarization of dyads.

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