Efficient CO₂ capture by tertiary amine-functionalized ionic liquids through Li⁺-stabilized zwitterionic adduct formation

• Zhen-Zhen Yang and
• Liang-Nian He

Beilstein J. Org. Chem. 2014, 10, 1959–1966, doi:10.3762/bjoc.10.204

• liquid absorbents allowing for reversible CO2 chemisorption [31][32][33][34][35]. In general, two absorbent molecules are involved to react with one CO2 molecule generating ammonium carbamate (Scheme 1a) or ammonium alkyl formate (Scheme 1b). Hence, increasing the 1:2 (CO2:absorbent molecule

• formation of ammonium carbamate as shown in Scheme 1a [38]. Notably, the CO2 capacity of guanidine-functionalized ILs increased in the order of [TMGLi][NTf2] (0.65) < [OctTMGLi][NTf2] (0.80) < [PEG150MeTMGLi][NTf2] (0.89 mol CO2 absorbed per mol of base) (Table 1, entries 5–7), indicating that the CO2

Insights into the mechanical properties of a silicone oil gel with a ‘latent’ gelator, 1-octadecylamine, and CO₂ as an ‘activator’

• Emiliano Carretti,
• Mathew George and
• Richard G. Weiss

Beilstein J. Org. Chem. 2010, 6, 984–991, doi:10.3762/bjoc.6.111

• mechanical measurements is used to characterize the gel networks and how they respond to temperature and strain. It is shown, for example, that very precise measurements of the gel-to-sol transitions can be obtained from plots of viscosity versus temperature. Keywords: ammonium carbamate; damping factor

• ammonium carbamate from ODA, C18H37NHCO2− +H3NC18H37 (ODA-C), is held together much more strongly, by electrostatic forces, than uncharged latent LMOG molecules. Especially in liquids of low polarity, the electrostatic forces and ion pairing are very strong and they are the basis for the induced self

• on applied shear stress is minimized and the gelator network structures (i.e., self-assembled fibrillar networks or SAFINs) are pre-established to avoid shear alignment. Also, the very low solubility of the ammonium carbamate salt in silicone oil indicates that a very high fraction of ODA-C remains