Fig. 2: Crystal structure evolution of Cd(BDC)(DMF) with pressure.

a Selected ADXRD patterns of Cd(BDC)(DMF) at different pressures. b Evolution of the acute angle within rhombus and the distance between rhombic layers in Cd(BDC)(DMF) structure with pressure. The amplified IR spectra from 620 to 1000 cm−1 of Cd(BDC)(DMF) (c) during compression, d at 1 atm and after releasing pressure from 18.4, 25.2, and 30.3 GPa. e Schematic diagram of the structure and the Hirshfeld surfaces for BDCs with a dnorm distance of Cd(BDC)(DMF) before and after pressure treatment of 18.2 GPa. The black arrows, gray triangles, and gray arrows indicate the changes in the (001) crystal plane, δop(O–C–O), and δop(C–H) with pressure, respectively.