Lyotropic liquid crystalline phases with a series of N-alkyl-N-methylpiperidinium bromides and water

Self-assembly of quaternary ammonium gemini surfactants in cyclohexane upon reinforcement by simple counterions

“…24,25 POM observation also showed typical textures of a hexagonal structure ( Fig. 3b), 21,28,29 supporting the postulated formation of a H 2 phase in this sample. The SAXS diffraction patterns for 12-6-12/NaSal (200/ 400 mmol L À1 ) in cyclohexane at W 0 ¼ 48 and 54 are shown in Fig.…”

“…Similar to cubic liquid crystalline systems, hexagonal liquid crystalline samples also follow Maxwell uid behaviour, but not as perfectly over the range of frequencies tested due to the complexity of real-life systems. 51,56 Fig. 9 shows oscillatory sweep rheograms of 12-6-12/NaBez and 12-6-12/NaBres, where Maxwell behaviour is shown.…”

Synthesis of Functional Nanomaterials in Ionic Liquids

“…ILs with alkyl length n > 10 in the cations are almost low‐melting‐temperature mesomorphic crystalline solids, which are feasible to form LC gels. The lyotropic liquid‐crystalline phases could be formed by a series of N ‐alkyl‐ N ‐methylpiperidinium bromides (C n PDB, n = 12, 14, 16) in water . Firestone et al found that C 10 mimBr formed an LC gel after the addition of water .…”

Two‐dimensional Raman spectroscopy study of ionogel phase formation in long‐chain ionic liquid/water systems

“…Raman spectroscopy was used to study RTILs/water systems, while water content was continuously increased from 0 to the 30% mass fraction of water. At this concentration range some of imidazolium‐based RTILs with long alkyl chains can form various liquid crystalline (LC) ionogel phases in water solutions . Ionogel have attracted considerable attention in the areas of biomaterials, electro‐optics, and as templates for the preparation of mesoporous materials and ordered thin films .…”