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Two novel coumarin-based pyrazoline derivatives have been designed and synthesized as organogel factors. Organogelators Z 1–2 both have gelation behavior in alcohol solution and DMSO. Gel- tert -butanol Z 1–2 (CGC = 1.84%, 1.41%) fluoresce blue and yellow-green under ultraviolet irradiation, respectively. Z 1–2 both exhibit selectivity for response to Fe3+ in THF-deionized aqueous (V: V = 9:1) solution, meanwhile display high sensitivity. Notably, introducing diethylamino at 7-position the coumarin unit increases the detection line range in Z 2. Furthermore, Z 2 not only has a good biocompatibility in living cells but also the sensing behavior of Fe3+ in the cell nucleus. The coordination mechanism of gelators Z 1–2 and Fe3+ were performed at the DFT level. [Display omitted] • Two novel coumarin-based pyrazoline organogelators Z 1–2 have designed and synthesized. • The Z 1–2 can both form fluoresce organogels in tert-butanol (CGC=1.84%, 1.41%). • The Z 1–2 can both response to Fe3+ in aqueous solution and organogels with selectivity and sensitivity. • The Z 2 can detect Fe3+ in living cells. [ABSTRACT FROM AUTHOR]

Five naphthalene-type chalcone organogelators with different hydrophobic alkyl units, were designed and synthesized. The prepared organogelators demonstrated excellent gel properties in some selected solvents, such as cyclohexane, tert -Butanol, isooctane, and isopropanol etc. The results for thermal stability showed that the alkyl chain length attached to the chalcone also had an important influence on the gelation behavior. Under identical concentrations increasing the length of alkyl chains of the gel molecules and then the gel-to-sol transition temperature value is increased too. It has found that the hydrogen bonding between molecules, the van der Waals force and the π-π stacking provide multiple driving forces for gel self-assembly using various techniques. The morphology of the xerogel was investigated by Scanning Electron Microscope (SEM). As the length of the carbon chain increases, the dry gel tends to form a lamellar network structure. The UV–vis absorption and emission spectra of the gel molecules were also studied. [ABSTRACT FROM AUTHOR]

Oil spillage and water pollution are serious environmental disasters, which have a serious impact on the economy and ecosystem. To protect the environment，we have synthesized a new type of chalcone derivative (G1) gel. G1 can form gels in many organic solvents, fuels and edible oils. The FT-IR, SEM and XRD studies show that there are π-π stacking, Van der Waals and intermolecular H bonding force in the G1 gel self-assembly process. 3D networks structure provides a strong basis for the adsorption of dyes and the adsorption efficiency could be as high as 97.2%. The G1 can selectively gel in organic water pollutants, with recyclability. Even in the presence of salt, acid and alkali, it can be successfully used to recover spilled oil from oil-water mixture. [Display omitted] [ABSTRACT FROM AUTHOR]