Self-assembled sonogels formed from 1,4-naphthalenedicarbonyldinicotinic acid hydrazide.

In this paper, we report self-assembled sonogels formed from 1,4-naphthalenedicarbonyldinicotinic acid hydrazide (NDC-NN3) in some liquids including ethanol, tetrahydrofuran (THF), 1,4-dioxane, -propanol, -butanol and -pentanol. When the clear solution of NDC-NN3 in the selected liquids mentioned above at a suitable concentration was irradiated with ultrasound waves at room temperature, a sonogel was formed. Upon heating, the sonogel dissolved gradually and finally became a clear solution again.

Supramolecular gel formation regulated by water content in organic solvents: self-assembly mechanism and biomedical applications.

As one of the most important and fruitful methods, supramolecular self-assembly has a significant advantage in designing and fabricating functional soft materials with various nanostructures. In this research, a low-molecular-weight gelator, ,'-di(pyridin-4-yl)-pyridine-3,5-dicarboxamide (PDA-N4), was synthesized and used to construct self-assembled gels a solvent-mediated strategy. It was found that PDA-N4 could form supramolecular gels in mixed solvents of water and DMSO (or DMF) at high water fraction (greater than or equal to 50%).

Supramolecular organogels fabricated with dicarboxylic acids and primary alkyl amines: controllable self-assembled structures.

Supramolecular organogels are soft materials comprised of low-molecular-mass organic gelators (LMOGs) and organic liquids. Owning to their unique supramolecular structures and potential applications, LMOGs have attracted wide attention from chemists and biochemists. A new "superorganogel" system based on dicarboxylic acids and primary alkyl amines (R-NH) from the formation of organogels is achieved in various organic media including strong and weak polar solvents.

A pH-/thermo-responsive hydrogel formed from ,'-dibenzoyl-l-cystine: properties, self-assembly structure and release behavior of SA.

In this study, we report a pH-/thermo-responsive hydrogel formed by ,'-dibenzoyl-l-cystine (DBC). It is difficult to dissolve DBC in water even on heating, and it exhibits no gelation ability. Interestingly, DBC is readily soluble in NaOH solution at room temperature and the self-assembled hydrogels are obtained by adjusting the basic DBC aqueous solution with HCl to achieve a given pH value (<3.

Self-assembled metallogels formed from N,N',N''-tris(4-pyridyl)trimesic amide in aqueous solution induced by Fe(III)/Fe(II) ions.

In this work, we report self-assembled metallogels formed from a ligand of trimesic amide, N,N',N''-tris(4-pyridyl)trimesic amide (TPTA), induced by Fe(III)/Fe(II) ions. TPTA is difficult to dissolve in water even in the presence of some metal ions such as Cu(2+), Co(2+), Ni(2+), K(+), Na(+) and Mg(2+) under heating, and it exhibits no gelation ability. Interestingly, upon heating TPTA can be dissolved easily in aqueous solution containing Fe(3+)/Fe(2+), and subsequently self-assembled into metallogels after cooling.

A microporous hydrogen-bonded organic framework: exceptional stability and highly selective adsorption of gas and liquid.

An extremely stable hydrogen-bonded organic framework, HOF-8, was fabricated. HOF-8 is not only thermally stable but also stable in water and common organic solvents. More interestingly, desolvated HOF-8 exhibits high CO2 adsorption as well as highly selective CO2 and C6H6 adsorption at ambient temperature.

Two-component supramolecular organogels formed by maleic N-monoalkylamides and aliphatic amines.

The complexes of maleic N-monoalkylamides and aliphatic amines lead to the formation of sheet-like and fiber-shaped aggregates in diverse organic solvents. Their morphologies and microstructures were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), as well as small angle X-ray diffraction (SA-XRD). The results reveal that the alkyl chain lengths of 8-12 carbons for maleic N-monoalkylamides, and 12-18 carbons for aliphatic amines, are suitable for obtaining highly efficient two-component gelators.

Self-assembled organogels formed by monochain derivatives of ethylenediamine.

A family of low molecular weight organogelators (LMOG) based on monochain derivatives of ethylenediamine were investigated. The monochain derivatives of ethylenediamine show strong gelation ability in a number of organic solvents, including polar solvents and non-polar solvents. In gel state, molecules of monochain ethylenediamine derivatives self-assemble into ordered aggregates, which are juxtaposed and interlocked to form three-dimensional networks of fiber bundles as confirmed by scanning electron microscopy (SEM).

Supramolecular organogels formed by monochain derivatives of succinic acid.

The monoalkyl chain derivatives of succinic acid self-assemble into ordered bilayer aggregates by forming dimers of hydrogen bonded carboxylic acid in a number of organic solvents and finally gelatinize the solvents. The gelation ability of each derivative was inspected. The morphologies of xerogels were investigated by scanning electron microscope (SEM).