Fig. 4. Amorphisation of ZIF-8 without recrystallization. Milling was started but had to be interrupted to restart diffraction data collection. The temperature profile first shows heating, followed by a cooling step before another onset of heating after milling was restarted. ZIF-8 is already present and the mixture seems homogenous at the beginning of PXRD monitoring because of the first interrupted milling period. After milling was stopped, the reaction vessel spontaneously cooled as per Newton's law of cooling. Homogeneity and uniformity of the reaction mixture is evident from the uniformity of the diffraction signal from crystalline silicon (at 2.6° in 2theta) which was used as an internal scattering standard.22.
