*2.5. Differential Scanning Calorimetry (DSC)*

DSC analyses were performed using a routinely calibrated TA Instruments differential scanning calorimeter Discovery equipped with a computer analyzing system (TRIOS). Indium standard and a sapphire disk were used for temperature/enthalpy calibration and heat capacity calibration, respectively. The system was equipped with a refrigerated cooling system (RCS90) accessory under a dry nitrogen purge (50 mL/min). About 1–5 mg of each sample were placed into a Tzero Aluminum hermetic DSC pan covered with a lid. The sample cell was equilibrated at 0 ◦C and heated under a nitrogen purge (50 mL/min). All samples were given similar thermal histories by linearly heating to 300 ◦C at a heating rate of 10 ◦C/min.
