Fig. 4: Synthesis process and structural evolution in coordinated CTS pyrolysis.

a The TGA-DTG profile of metal-organic complex (MOC) from 50 to 1000 °C in Ar gas. b FT-IR spectra of MOC-derived samples after CTS treatment at different temperatures. c The in situ GIWAX spectrum of Co-dimethylimidazole (Co-2-MeIm) from 30 to 300 °C and the corresponding diffraction pattern at the transformation temperature. d The in situ GIWAX spectrum of Cu-dimethylimidazole (Cu-2-MeIm) (control) from 30 to 300 °C and the corresponding diffraction pattern at characteristic temperatures. e Schematic process of structure evolution in coordinated CTS pyrolysis.