Acknowledgements We thank Prof. Polimeno A for spectrum analysis and Prof. Shin YK for the assistance with FDDM program.This work was supported by the grants from the National Natural Science Foundation of China (Nos. 31170714 and 30970693), and Beijing Municipal Natural Science Foundation (No. 7132134).
Many experimental factors and uncontrollable factors may introduce errors in the distance measurement by continuous wave electron paramagnetic resonance. To deal with this problem, several C60 nitroxide diradical addu...