Formation of a sheet-like hydrogel from vesicles via precipitates based on an ionic liquid-based surfactant and β-cyclodextrin

Li, Shangyang; Xing, Peng; Hou, Yuehui; Yang, Jingshu; Yang, Xuezhi; Wang, Bo; Hao, Aiyou

doi:10.1016/j.molliq.2013.08.022

Cited by 24 publications

(8 citation statements)

References 45 publications

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“…The authors found that the addition of inorganic salts (e.g., KCl, NaCl, CuCl, and K 2 CO 3 ) induces the formation of sheetlike hydrogels. 439 Using diimidazolium salts with different alkyl chain lengths to interact with α-CD and 155 , D’Anna and Noto et al developed another series of two-component hydrogels, with CGC values from 1.0 to 4.7 wt %, formed by host–guest interactions based on cyclodextrins and cationic imidazoliums 154 . 440 They demonstrated that the nature of the cyclodextrin, the salts, and the host:guest ratio are effective tools for tuning the properties of these two-component hydrogels.…”

Section: Molecular Designmentioning

confidence: 99%

Supramolecular Hydrogelators and Hydrogels: From Soft Matter to Molecular Biomaterials

et al. 2015

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In this review we intend to provide a relatively comprehensive summary of the work of supramolecular hydrogelators after 2004 and to put emphasis particularly on the applications of supramolecular hydrogels/hydrogelators as molecular biomaterials. After a brief introduction of methods for generating supramolecular hydrogels, we discuss supramolecular hydrogelators on the basis of their categories, such as small organic molecules, coordination complexes, peptides, nucleobases, and saccharides. Following molecular design, we focus on various potential applications of supramolecular hydrogels as molecular biomaterials, classified by their applications in cell cultures, tissue engineering, cell behavior, imaging, and unique applications of hydrogelators. Particularly, we discuss the applications of supramolecular hydrogelators after they form supramolecular assemblies but prior to reaching the critical gelation concentration because this subject is less explored but may hold equally great promise for helping address fundamental questions about the mechanisms or the consequences of the self-assembly of molecules, including low molecular weight ones. Finally, we provide a perspective on supramolecular hydrogelators. We hope that this review will serve as an updated introduction and reference for researchers who are interested in exploring supramolecular hydrogelators as molecular biomaterials for addressing the societal needs at various frontiers.

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Section: Molecular Designmentioning

confidence: 99%

Supramolecular Hydrogelators and Hydrogels: From Soft Matter to Molecular Biomaterials

et al. 2015

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“…The aggregate structure with nano-sized cross-sectional diameter is not common in supramolecular hydrogel systems. In the previously reported cyclodextrin-based supramolecular hydrogel systems, the aggregate microstructures are generally lamellar structures and vesicles. ,− In addition, a small number of reports have described entangled fibers or hollow microtubes with cross-sectional diameters of tens to hundreds of nanometers. , Only the anionic surfactant C 12 biphNa and β-cyclodextrin system reported by Zhai et al forms a fiber structure with a cross-sectional diameter of 7–8 nm at very low concentration. Irrespective of the stiffness, the aggregate structures are similar to the wormlike micelles formed by surfactants through hydrophobic interactions, which indicates that the nano-sized fibers formed in cyclodextrin-based supramolecular hydrogel systems retain the core-shell structure of traditional micelles, which has a hydrophobic inner core and a hydrophilic surface.…”

Section: Resultsmentioning

confidence: 98%

“…As host molecules with a hydrophilic surface and a hydrophobic cavity, CDs can be combined with the hydrophobic groups of surfactants to form inclusion complexes, which can also aggregate under suitable conditions. For example, the inclusion complexes formed by β-CD and surfactants with different structures can aggregate into annular ring microtubes, , vesicles, ,, lamellae, ,− and fibers , via hydrogen-bond-invoked nonamphiphilic assembly. The dynamic binding of α-CD with different species in a responsive hydrogel system has also been observed .…”

Section: Introductionmentioning

confidence: 99%

Supramolecular Hydrogels with Chiral Nanofibril Structures Formed from β-Cyclodextrin and a Rosin-Based Amino Acid Surfactant

Wang

Chen

Song

et al. 2020

J. Agric. Food Chem.

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The rational combination of natural molecules is expected to provide new soft material building blocks. Herein, a rosin-based amino acid surfactant was synthesized using dehydroabietic acid and L-serine as the starting materials (denoted as R-6-Ser). Supramolecular hydrogels were formed when β-cyclodextrin (β-CD) was mixed with R-6-Ser at molar ratios of over 0.5:1 and above certain concentrations. The hydrogels were investigated using rheometry, small-angle X-ray scattering, CD spectroscopy, and cryo-transmission electron microscopy (cryo-TEM). The β-CD associated with the isopropyl benzyl group of the dehydroabietic acid unit in R-6-Ser and formed R-6-Ser@β-CD complexes. The complexes and R-6-Ser self-assembled to form elongated righthanded rigid fibers with a diameter of approximately 7−8 nm, which were responsible for the elasticity of the hydrogels. This work demonstrated the feasibility of preparing supramolecular hydrogels from a diterpenoid-based surfactant and β-CD and provides a new means of utilizing the secretions of pine trees.

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“…430 nm for neat [C 8 the similar size of the b-CD cavity and imidazolium cation play an important role in the complexation process [41]. The building block structure of the C 16 TPB@2b-CD complex was found in aqueous solution, which can form a sheet-like hydrogel with multiresponsive properties [43]. b-CD and [C 4 MIM]PF 6 can also enhance the solubility of each other due to formation of inclusion complexes of 1:1 or 1:2 stoichiometry and the entrance of [C 4 MIM] + into the hollow b-CD cavity [46].…”

Section: Interactions Between Ionic Liquids and B-cdmentioning

confidence: 99%

“…Li and coworkers found that two b-CD tend to incorporate one ionic liquid C 16 TPB molecule to form a C 16 TPB@2b-CD complex. The aggregates of C 16 TPB@2b-CD, as consistent building blocks, can construct bilayer membranes at the appropriate concentration [43]. However, surface tension measurements revealed that there were two kinds of inclusion formations having 1:1 and 1:2 stoichiometry for b-CD-[C 12 MIM]PF 6 and that only the tails of [C 12 MIM]PF 6 were incorporated into the b-CD cavity.…”

Section: Stoichiometry and Inclusion Constantmentioning

confidence: 99%

The joint effects of room temperature ionic liquids and ordered media on fluorescence characteristics of estrogens in water and methanol

Wang

Duan

Dahlgren

et al. 2014

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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h i g h l i g h t sBoth b-CD and CTAB could sensitize the fluorescence of EE2 and E2. Inclusion ratio of the complex was 1:1. Typical RTILs including [C n MIM]BF 4 and [C n MIM]PF 6 (n = 4, 6). The fluorescence lifetimes were 2.50-2.53 and 4.03-4.13 ns for EE2 and E2. The quenching process was demonstrated to be a dynamic quenching mechanism. g r a p h i c a l a b s t r a c tThe fluorescence lifetimes of EE2 were 2.50 and 4.13 ns, respectively, in water and methanol, and they increased gradually with increasing of b-CD concentrations. a r t i c l e i n f o t r a c tThis study investigated the steady-state and time-resolved fluorescence properties of 17a-ethinylestradiol (EE2) and 17b-estradiol (E2) in the presence of ordered media (b-cyclodextrins (b-CD) and cetyltrimethylammonium bromide (CTAB)). In addition, we analyzed the effects of four room temperature ionic liquids (RTILs) on the fluorescence intensities (FIs) of EE2/b-CD and E2/b-CD inclusion complexes in methanol. Both b-CD and CTAB enhanced the fluorescence of EE2 and E2. The FIs of EE2 and E2 with b-CD or CTAB in methanol were greater than those in water, possibly resulting from decreased oxygen-quenching in H 2 O molecules. b-CD and CTAB may form inclusion complexes with estrogen in both water and methanol. The inclusion ratio of the complex was 1:1 and the inclusion constant (K) values in water were greater than those in methanol. The fluorescence lifetimes were 2.50 and 4.13 ns for EE2 and 2.58 and 4.03 ns for E2 in aqueous solution and methanol, respectively. The changing trend of fluorescence lifetimes for EE2 and E2 in b-CD or CTAB was similar to the steady-state FIs. The four RTILs had a significant quenching effect on the FIs of EE2/b-CD and E2/b-CD, and the quenching process for EE2/ b-CD and E2/b-CD by RTILs was demonstrated to be a dynamic quenching mechanism. Fluorescent data obtained from these complex systems provide a theoretical foundation for understanding the interaction mechanisms between ordered media and RTILs in the analysis of estrogens.

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Formation of a sheet-like hydrogel from vesicles via precipitates based on an ionic liquid-based surfactant and β-cyclodextrin

Cited by 24 publications

References 45 publications

Supramolecular Hydrogelators and Hydrogels: From Soft Matter to Molecular Biomaterials

Supramolecular Hydrogelators and Hydrogels: From Soft Matter to Molecular Biomaterials

Supramolecular Hydrogels with Chiral Nanofibril Structures Formed from β-Cyclodextrin and a Rosin-Based Amino Acid Surfactant

The joint effects of room temperature ionic liquids and ordered media on fluorescence characteristics of estrogens in water and methanol

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