Figure 6.

Scattering profile of a bis(2-ethylhexyl)amine/bis(2-ethylhexyl)phosphoric acid binary liquid mixture (equimolar mixture, red line) as compared to the two neat components bis(2-ethylhexyl)amine (yellow line) and bis(2-ethylhexyl)phosphoric acid (green line) (A). It can be noted that the mixture shows an increase of the intensity at the low-angle peak as a consequence of the local intermolecular self-assembly (A). X-ray diffraction pattern (peak 1) at low angle (B) and associated higher-order diffraction peaks at high angle (inset of B) regions of the 2-undecylimidzole (UI)−monododecyl phosphate (MDP) composite materials, evidence the formation of highly ordered bilayer lamellar structures [85]. The formation of a proton-conduction mechanism (C) is favorite by the imidazole headgroups (D) that are protonated by the proton transfer from neighboring MDP molecules. Adapted with permission from [85], Copyright 2019 American Chemical Society.