[Li@C 60 ]PF 6 : Infrared spectra from 90K to 523K; Determination of the molar extinction coefficients and integrated molar absorptivity

The molar extinction coefficient ε and the integrated molar absorptivity ψ values of all the mid-infrared and far-infrared absorption bands of [Li@C60]+PF6- were determined in comparison to those of C60. The dependence from temperature of all the infrared absorption bands of [Li@C60]+PF6- was measured in the temperature range comprised from 523 K and 90 K and extrapolated to 0 K. Once again, the results were discussed in comparison to the C60 analogous experimental results.