Time-resolved in-situ X-ray diffraction and crystal structure analysis of porous coordination polymer CPL-1 in CO2 adsorption

Abstract

The phase transition from the degassed phase to the gas adsorption phase in a copper porous coordination polymer with pillared-layer structure CPL-1 was observed using time-resolved in-situ synchrotron radiation X-ray powder diffraction. The time evolution of the gas adsorption phase and the structural change of the framework were simultaneously observed. As regards CO2 adsorption, the results suggest two-step adsorption stages in the early stage of the gas adsorption process and the energy barrier of framework deformation required to incorporate gas molecules. Further, we determined the CO2 adsorption structure of CPL-1.