Flexible metal-organic framework compounds: In situ studies for selective CO2 capture

We present in situ small-angle neutron scattering results for two flexible metal-organic frameworks (MOFs). The figure shows that for one (NiBpene, high CO2 adsorption) the intensity of the Bragg peak for the expandable d-spacing most associated with CO2 adsorption varies approximately with the isotherm, while for the other (NiDBM-Bpy, high CO2 selectivity) the d-spacing, itself, varies with the isotherm. The cartoons show the proposed modes of structural change.220