Design, Synthesis and Properties of Novel C60-Crown Dyads by 1,3-Dipolar Cycloaddition

Based on the 1,3-dipolar cycloaddition of azomethine ylide generated in situ from aldehyde and sarcosine attached to C60, two novel benzo-15-crown-5/C60 dyads with a different linking chain in each were designed and synthesized in yields of 30% and 38%, respectively. It was found that their UV-Vis absorption spectra could be regulated hypsochromically by metal ions complexed. The long and soft linking chain was favorable for cooperate interaction of crown ether unit and C60 unit.