M. Kawaguchi et al., SYNTHESIS AND METAL-BINDING PROPERTIES OF [60]FULLERENE-LINKED CALIX[4]ARENES - AN APPROACH TO EXOHEDRAL METALLOFULLERENES, Journal of the Chemical Society. Perkin transactions. I, (2), 1998, pp. 179-184
'Fullerenocalixarenes' in which [60]fullerene is covalently linked thr
ough two ionophoric chains to a cone-calix[4]arene 1 or to a 1,3-alter
nate calix[4]arene 2 have been synthesized for the first time: althoug
h the absorption spectrum of 2 is scarcely changed upon addition of me
tal cations, that of 1 is affected by added Li+, Na+ and Ag+, indicati
ng the formation of exohedral [60]fullerene-metal complexes.