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(A) Time dependence of the fluorescence decay of 1H in 2-MeTHF from 5.5 to 300 K. (B) Arrhenius plots for 1H (red) and 1D (blue) in 2-MeTHF. (C) Arrhenius plot for 1H in a PMMA film. For (B) and (C), the experimental uncertainties in ln(kMS-CPET) and 1/T are smaller than the size of the data points.
