| 초록 |
Tetramethylammonium salts bearing a β-amino acid anion (TMAA) were synthesized via Michael addition reaction of amines with methyl acrylate followed by the hydrolysis and neutralization with tetramethylammonium hydroxide, and their CO2 capture performances were evaluated in water or alcohol. Thus prepared TMAAs were found to interact with CO2 in a 1:1 mode in both water and an alcohol. FT–IR and 13C NMR spectroscopy studies on the interactions of TMAA with CO2 indicate that the type CO2 adduct varies with the solvent employed. In water solvent, bicarbonate species is produced, whereas hydroxyethylcarbonate and methylcarbonate species are generated in EG and methanol, respectively. Computational calculations show that the carboxylate groups of TMAAs contribute to the formation and stabilization of 1:1 CO2 adducts through the hydrogen bonding interactions with the hydrogen atom of amino groups. |
