To perform thermogravimetric (TGA) and DSC analysis, a Netzsch STA 449 F1 instrument was used. Approximately 10 to 15 mg of each sample was gently pressed by hand in an aluminum crucible. 20 mL min -1 of nitrogen flow was used to ensure an inert atmosphere during the measurements. Samples were heated to the target temperatures with variable heating and cooling rates, i.e., 5 °C min -1 , 10 °C min -1 , and 20 °C min -1 . Depending on experiment, the maximum temperatures varied between 220°C and 300 °C (see text in the results section for details).