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Synthesis and Self-assembly of Chalcone-based Organogels

Zhang, Ying-Peng, Wang, Bao-Xu, Yang, Yun-Shang, Liang, Chuan, Yang, Chen, Chai, Hong-Li
Colloids and surfaces 2019
carbon, chalcone, cyclohexanes, gelation, hydrogen bonding, hydrophobicity, iso-octanes, isopropyl alcohol, organogels, scanning electron microscopes, scanning electron microscopy, solvents, temperature, thermal stability, ultraviolet-visible spectroscopy, van der Waals forces, xerogels
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.