ABSTRACT
Pentacyanonitrosylferrates, commonly named nitroprussides (NPs) are a group of metal cyanides. NPs exhibit a marked polymorphic nature. Then, minor changes in the synthesis process of these materials could lead to materials with fairly different properties. A chamber was applied to collect the in situ X-ray diffraction profiles of the NPs during carbon dioxide adsorption at 298 K and 1 atm. For the adsorption experiment, carbon dioxide was allowed into the chamber at a flow rate of 50 mL/min. Dispersion and repulsion are the fundamental forces present during physical adsorption in all adsorbents. Transition metal cyanides also known as Prussia blue analogs (PBAs) exhibit structures built with transition metals attached through the linear cyanide chain provided these compounds are very useful owing to their magnetic, adsorption, and other properties. The structural framework of PBAs is associated to the perovskite structure, even though the metal centers are evidently linked by the cyanide bridges instead of oxide ions.
