Aqueous self-assembly of SDS@2β-CD complexes: lamellae and vesicles

Dielectric relaxation behavior of SDS/β-CD organized self-assembly in dilute aqueous solution

“…According to the fitted dielectric parameters, the dielectric increment De (a), and the low frequency conductivity k l , phase behavior transition can be roughly separated into three stages, below 4%, from 4% to 5.5%, and above 5.5%. The result is similar with Jiang's work [14]. e l and e h are low-and high-frequency limits of relative permittivity, respectively; De = e l À e h is dielectric increment; k l is low-frequency limits of conductivity; f 0 is characteristic relaxation frequency and t 0 = (2pf 0 ) À1 is relaxation time…”

“…Jang [4][5][6][7][8] designed and performed a series of experiments with CD-based host-guest systems, and found that CDs served as destructive modulators, constructive modulators, and unamphiphilic building units. At the same time, the microstructures of surfactant molecule self-organized assemblies under different conditions are academically researched by means of NMR spectroscopy, small-and wide-angle X-ray scattering (SAXS, WAXS), neutron scattering, infrared spectroscopy, confocal laser scanning microscopy (CLSM), atomic force microscopy (AFM), freeze-fracture transmission electron microscopy (FF-TEM), and so on [9][10][11][12][13][14][15]. For instance, the structure transition of SDS/b-CD complexes, from vesicles to microtubules to lamellae with increasing concentration, was characterized by AFM, CLSM, SAXS, WAXS and TEM [14,15].…”

Secondary assembly mechanism of cyclodextrin based on LiNTf2@β-CD system

“…While the major peaks at 2h = 11.5 and 17.6°in Fig. 5d and e are characteristic of the channel-type of b-CD [48][49][50]. It can thus be deduced that the b-CD molecules form the channel-type structure in the self-assembly, probably the nanotube structures.…”

Soft aggregates formed by a nonionic phytosterol ethoxylate and β-cyclodextrin in aqueous solution

“…In these systems, the hydrophobic effect between building blocks was still the main driving forces for the aggregate formation. Recently, Huang et al observed an interesting soft aggregate formation from the fully hydrophilic complexes between an ionic surfactant (SDS) and ␤-CD [19][20][21]. The SDS@2␤-CD complex could self-assemble into lamellaes, microtubes, and vesicles at different concentrations in aqueous systems.…”

“…The H-bonding and electrostatic interaction are attributed here as the driving forces for the ordered phase formation in the absence of the hydrophobic effect. However, the complexes of conventional C n E m type nonionic surfactant and CD often result in powder precipitates due to the lack of electrostatic interaction [20,22]. Thus, is it possible to fabricate ordered aggregates for such nonionic mixtures by choosing certain specific amphiphile structures?…”