Use of Electron Paramagnetic Resonance Spectroscopy to Study Dielectric Properties of Liquids

Figure 8

TEMPO reference EPR signal intensity (arbitrary units) as a function of dielectric constant for various solvents (ε = 2.24 carbon tetrachloride, ε = 4.86 chloroform, ε = 11.9 t-BuOH, ε = 24.3 ethanol, and ε = 32.6 methanol). The 3/5 mm coaxial tube assembly was used. Error bars of 3.5% are shown as discussed in the text.