Structural determination of a 1-D metal–organic framework with adsorbed oxygen molecules at 10 K: possibility of surface motion transfer of confined guest

Single-crystal X-ray analysis at 10 K revealed adsorbed oxygen within the ultramicropores of a single crystal gas adsorbent, rhodium(II) benzoate-pyrazine. This indicates that the oxygen molecules were captured on the necks of infinite channels by the intermolecular interaction between the guest O2 and the benzoate moieties on the inner host surface and the guest probably diffuses through the narrow necks driven by surface local motion.