Silicones with a variety of linear, branched, star, and cyclic architectures were synthesized that contained electron donating ethylaminopropyl groups attached to the silicone core. These solvents were tested for CO2 uptake and their physical state after reaction. In comparison to analogous materials that only possessed a primary amine, all of the heteroatom-substituted derivatives displayed excellent CO2 uptake and all maintained a liquid, flowable state after reaction. Optimal CO2 uptake was achieved at ambient temperatures rather than the typical 40 degrees C level. This was likely due to the lower heats of reaction for the secondary amine structure. beta-Isomer present in the samples did not adversely affect the reaction with CO2 or the ability to remain in a liquid state upon complete reaction.