The changes in absorption at a frequency of 1 THz with temperature for the formulations are plotted in Figures and. In line with previous experiments for a range of organic molecular materials, three distinct temperature regions can be identified for each material and T g, was defined as the intersection point of the two best-fit linear fits at low temperatures, and T g,↵ was defined as the intersection point of the two best-fit linear lines at high temperatures. It is worth noting that the values of T g,↵ , as determined from the THz-TDS experiments, are in good agreement with our own calorimetric measurements, T g,DSC , as well as the values reported in the literature for these materials (Table , see ESI) .