Aggregation behavior of pyridinium based ionic liquids in water – Surface tension, 1H NMR chemical shifts, SANS and SAXS measurements

Self‐Assembly Directed Organization of Nanodiamond During Ionic Liquid Crystalline Polymer Formation

“…The formation of the H‐bonded network comprising water, bromide ion, and primarily the C 2 proton of the imidazolium cation is believed to form a region of confined water giving rise to physical gelation. [38a], Sastry et al examined the structure of a pyridinium‐based ionic liquid by SAXS and noted the presence of a broad correlation peak in the region of q ≈ 0.2 Å −1 (20 Å) and argued it was due to the local structural organization of the IL cation–anion and water shell . Here, the functionalized ND, a mixture of ND‐[COOC 10 H 20 VIm + ][Br − ] and ND‐COOC 10 H 20 Br, SAXS pattern also shows a weak correlation peak in this q ‐range (ca.…”

Surface adsorption and micelle formation of imidazolium-based zwitterionic surface active ionic liquids in aqueous solution

“…Imidazolium-based SAILs have been most studied in the field of colloid and interface chemistry. Numerous SAILs based on imidazolium, pyridinium, pyrrolidinium cations with different hydrocarbon chain lengths were studied extensively using a variety of methods, such as surface tension, 1 HNMR, steady-state fluorescence spectroscopy, and conductivity measurements [10][11][12][13][14]. Additionally, the effects of anionic nature (e.g., Cl À , Br À , NO À 3 , I À , BF À 4 , CF 3 SO À 3 , CH 3 COO À , ClO À 4 ) [15][16][17][18], various organic additives [19], and salts [20] on the aggregation behavior of SAILs in aqueous solutions were investigated.…”

Effect of alkyl chain length and head group on surface active and aggregation behavior of ionic liquids in water

“…Our laboratory has recently reported the surface active features and aggregation characteristics of surfactant-like ionic liquids based on 1-alkyl-3-methylimidazolium or 1-alkyl-1-methylpyridinium halides of type. [C n mim][X] or [C n py][X], where n = 4, 6 or 8 and X = Cl − , Br − and I − in water as well as in aqueous solutions containing sodium chloride, sodium sulfate and 2-butoxyethanol as additives, by employing surface tension, electrical conductance, 1 H NMR and SANS methods [32][33][34]. Even though the studied ILs displayed characteristic CAC, the analysis of the results especially from the latter two methods revealed that true micelle-like aggregates are not evident in ILs when n = 4.…”