*2.6. Differential Scanning Calorimetry (DSC) and Thermogravimetric (TG) Measurements*

DSC and TG measurements were recorded with a Thermo plus EVO2-DSC 8230 and a Thermo plus EVO2-TG8120 TG-DTA, respectively (Rigaku Co., Tokyo, Japan). The DSC sample (~3 mg) was placed into an aluminum-crimped pan and the TG sample (~4–5 mg) was placed into an aluminum-open pan, and both were measured at a speed of 5◦C/min from 25 to 300◦C under nitrogen gas (flow rate = 50 and 100 L/min, respectively).
