Fig. 1: The purity examination of VSc2C@C80 (II) and VSc2C@C78.

a HPLC chromatograms and b LD-TOF mass spectra of VSc2C@C80 (II) and VSc2C@C78. (column: Buckyprep, eluent: toluene, flow rate: 5 mL.min−1, injection volume: 5 mL, temperature: 40 °C).

a HPLC chromatograms and b LD-TOF mass spectra of VSc2C@C80 (II) and VSc2C@C78. (column: Buckyprep, eluent: toluene, flow rate: 5 mL.min−1, injection volume: 5 mL, temperature: 40 °C).