Progress in the studies of low-molecular mass gelators with unusual properties

Liu, Kaiqiang; He, Panli; Fang, Yu

doi:10.1007/s11426-011-4250-x

Cited by 41 publications

(27 citation statements)

References 72 publications

(161 reference statements)

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“…LMMG / 5 LMOGs are being found that can gel solvents under other conditions such as photo irradiation, sonication, chemical or electrical stimuli. 29 Polymer (macromolecular) gels.…”

Section: Colloidal Gelsmentioning

confidence: 99%

Ionic liquid gel materials: applications in green and sustainable chemistry

2016

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“…LMMG / 5 LMOGs are being found that can gel solvents under other conditions such as photo irradiation, sonication, chemical or electrical stimuli. 29 Polymer (macromolecular) gels.…”

Section: Colloidal Gelsmentioning

confidence: 99%

Ionic liquid gel materials: applications in green and sustainable chemistry

2016

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“…Appropriately designed gelators, i.e. , decorated with suitable functional groups, can be programmed for example to be responsive to external stimuli such as light, mechanical stress, pH, ionic strength, metal ions, or anions [ 29 , 30 , 31 , 32 , 33 , 34 ]. In most cases, a change on a molecular level results directly in a change of macroscopic properties of the whole system.…”

Section: Introductionmentioning

confidence: 99%

In Situ Formation of Steroidal Supramolecular Gels Designed for Drug Release

Bunzen

Kolehmainen

2013

Molecules

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In this work, a steroidal gelator containing an imine bond was synthesized, and its gelation behavior as well as a sensitivity of its gels towards acids was investigated. It was shown that the gels were acid-responsive, and that the gelator molecules could be prepared either by a conventional synthesis or directly in situ during the gel forming process. The gels prepared by both methods were studied and it was found that they had very similar macro- and microscopic properties. Furthermore, the possibility to use the gels as carriers for aromatic drugs such as 5-chloro-8-hydroxyquinoline, pyrazinecarboxamide, and antipyrine was investigated and the prepared two-component gels were studied with regard to their potential applications in drug delivery, particularly in a pH-controlled drug release.

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“…As a recently developed medium for crystal growth, supramolecular gels derived from low‐molecular‐mass gelators (LMMGs), are a typical class of soft materials in which gelator molecules can be assembled into dynamic 3D networks via cooperative noncovalent interactions . The gel matrix commonly entraps solvent molecules and prevents the macroscopic flow of the solvent within its networks.…”

Section: Methodsmentioning

confidence: 99%

“…Additionally, structures of LMMGs can be tailored for adapting to different solvents including water and organic solvents. Thus, gel rheology or the surface functionality of gel fibers can also be altered accordingly, if needed . On the contrary, gelators for conventional gels are polymeric or clay‐like materials such as gelatine, agarose, polyacrylamide, or silica .…”

Section: Methodsmentioning

confidence: 99%

Spatially Confined Growth of Fullerene to Super‐Long Crystalline Fibers in Supramolecular Gels for High‐Performance Photodetector

et al. 2019

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been developed to grow 1D C 60 crystals including template method, slow evaporation, precipitation, liquid/liquid interface precipitation (LLIP), volatile diffusion, and gel-assisted method in general. While early attempts to grow C 60 crystals resulted in various morphologies, it was the use of crystalline C 60 fibers that had attracted particular interest because of their outstanding properties with high surface area and low dimensionality. [14] Although some methods were used to grow 1D fullerene crystals, it is still a great challenge to grow them with tunable sizes owing to their naturally 0D structures. Thus, to develop a method for the controlled growth of 1D C 60 crystals is still challenging and demanding for its promising applications, e.g., photodetector.As a recently developed medium for crystal growth, supramolecular gels derived from low-molecular-mass gelators (LMMGs), are a typical class of soft materials in which gelator molecules can be assembled into dynamic 3D networks via cooperative noncovalent interactions. [15][16][17][18][19][20][21][22] The gel matrix commonly entraps solvent molecules and prevents the macroscopic flow of the solvent within its networks. Sedimentation or aggregation of the crystals is suppressed in supramolecular gels and the arbitrary growths along faces in contact with the vessel walls or other crystals are also limited. Furthermore, the supramolecular gel could act as an inert matrix repressing heterogenous nucleation and making homogenous nucleation dominant. Or it affords an activated gel As a superstar organic semiconductor, fullerene (C 60 ) is versatile in nature for its multiple photoelectric applications. However, owing to its natural 0D structure, a challenge still remains unbeaten as to growth of 1D fullerene crystals with tunable sizes. Herein, reported is an efficient approach to grow C 60 as super-long crystalline fibers with tunable lengths and diameters in supramolecular gel by synergic changes of anti-solvent, gel length, crystallization time or fullerene concentration. As a result, the crystalline C 60 fibers can be modulated to as long as 70 mm and 70 000 in their length-to-width ratio. In this case, the gel 3D network provides spatial confinements for the growth of 1D crystal along the directional dispersion of anti-solvent. The fabricated fullerene device exhibits high responsivity (2595.6 mA W -1 ) and high specific detectivity (2.7 × 10 12 Jones) at 10 V bias upon irradiation of 400 nm incident light. The on/off ratio and its quantum efficiency are near to 540 and about 800%, respectively, and importantly, its photoelectric property remains very stable after storage in air for six months. Therefore, spatially confined growth of fullerene in supramolecular gels will be another crucial strategy to synthesize 1D semiconductor crystals for photoelectrical device applications in near future. 1D Fullerene CrystallizationAs a typical 0D carbon-based material, fullerene (C 60 ) is one of the important organic semiconductors and is versatile in nature on a...

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Progress in the studies of low-molecular mass gelators with unusual properties

Cited by 41 publications

References 72 publications

Ionic liquid gel materials: applications in green and sustainable chemistry

Ionic liquid gel materials: applications in green and sustainable chemistry

In Situ Formation of Steroidal Supramolecular Gels Designed for Drug Release

Spatially Confined Growth of Fullerene to Super‐Long Crystalline Fibers in Supramolecular Gels for High‐Performance Photodetector

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