Is basicity the sole criterion for attaining high carbon dioxide capture in deep-eutectic solvents?

Abstract

A critical analysis of the role of Hammett basicity (H₋) and aqueous basicity (pK_a) in CO₂ uptake in deep-eutectic solvents (DESs) suggests that neither H₋ nor pK_a correlates with the CO₂ w/w% capacity in the studied DESs. Instead, strong “synergistic interactions” between donor and acceptor moieties satisfactorily relate to the w/w% of CO₂ in DESs.