Carbon dioxide is known to react reversibly with metal oxides to form metal carbonates.1 However, there are only a few reports of molecules possessing terminal oxo ligands that react with CO2.2�5 We will present well-defined molecular complexes with nucleophilic oxo ligands that react with CO2 in the solid state. Vibrational spectroscopy and carbon NMR studies indicate the formation of carbonates that dissociate only upon complex dissolution. Encouraged by these results, we used these metal-oxo units as building blocks for the synthesis of a new porous inorganic framework. The reactivity of the molecule is translated into the new material: it absorbs CO2 at room temperature, even under humid conditions. Interestingly, unlike the molecule, the reaction between the framework and CO2 is reversible. Extended adsorption/desorption cycling experiments show that the material can be regenerated up to at least 15 times, after being exposed to flowing CO2,without loss of capacity.1. J. Johnston, J. Am. Chem. Soc. 1910 , 32, 938�946.2. Silvia, J. S.; Cummins, C. C. Chem. Sci. 2011 , 2, 1474�1479.3. Krogman, K. P.; Bezpalko, M. W.; Foxman, B. M.; Thomas, C. M. Inorg. Chem. 2013 , 52, 3022�3031.4. Tsvetkov N. P., Andino, J. G., Fan, H.; Verat, A. Y.; Caulton, K. G. Dalton Trans., 2013 , 42, 6745�6755.5.Knopf, I.; Ono, T.; Temprado, M.; Tofan, D.; Cummins, C. C. Chem. Sci. 2014  in press. DOI: 10.1039/c4sc00132j

CO<sub>2</sub> capture by nucleophilic metal-oxo units in molecules and extended solids

248th National Meeting (2014)

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CO2 capture by nucleophilic metal-oxo units in molecules and extended solids

CO₂ capture by nucleophilic metal-oxo units in molecules and extended solids