New L-valine-based hydrogelators:formation of supramolecular hydrogels

摘要

New L-valinE derivatives,which have a positively charged group,function as excellent hydrogelators that can gel pure water,saline,and aqueous solutions containing inorganic acids and salts at 0.2wt%.The construction of supramolecular hydrogels and organogels via the self-assembly of low-molecular-weight compounds,hydrogelators,and organogelators,have been considerably explored.Organogelators and organogels are used in many industrial fields such as cosmetics,oils,and foods.In contrast,although hydrogels are indispensable for many chemical and biological applications,including superabsorptions,chromatography,drug delivery,biosensing,and tissue engineering,they have been traditionally constructed using hydrophilic polymers that are physically cross-linked through entanglements or chemically cross-linked into a network.