Solubility of iron(III) and nickel(II) acetylacetonates in supercritical carbon dioxide

As a common precursor for supercritical CO 2 (scCO 2 ) deposition techniques, solubility data of organometallic complexes in scCO 2 is crucial for the preparation of nanocomposites. Recently, metal acetylacetonates have shown great potential for the preparation of single-atom catalytic materials. In this study, the solubilities of iron(III) acetylacetonate (Fe(acac) 3 ) and nickel(II) acetylacetonate (Ni(acac) 2 ) were measured at the temperature from 313.15 to 333.15 K and in the pressure range of 9.5–25.2 MPa to accumulate new solubility data. Solubility was measured using a static weight loss method. The semi-empirical models proposed by Chrastil and Sung et al . were used to correlate the solubility data of Fe(acac) 3 and Ni(acac) 2 . The equations obtained can be used to predict the solubility of the same system in the experimental range.