Preparation And Properties Of Novel Ion-responsive Gelators

Al³⁺,F^-and other anions are essential in our daily life.These ions are widely used in water treatment,medicine,food additives,construction and packaging materials.However,excessive intake of these ions can also cause irreversible damage to the human body.In addition,the accumulation of some ions can cause great harm to the natural environment.According to their positive and negative effects on human’s health and the environment,then design and synthesis a range of materials as ion sensors has important biological and environmental implications.The work of this paper is divided into three parts:F^-、Cl^-、Br^-、F^-、Ac O^-和H₂PO₄^-.1.A series of pyrazinylhydrazine compounds were synthesized.The structures were confirmed by NMR and HRMS.The results showed a combination of intra-hydrogen bonding,π-πstacking and van der Waals interaction resulted in the aggregation of the organogelators to form three-dimension fibrous networks,Comparison of one-component gel properties,and the gel and solution could not only detect F^-,Ac O^-and H₂PO₄^-with the"naked eye",but also distinguish these three ions.It is found that B5d and b5d-16 are liquid crystals at room temperature,and the mesocrystalline phase interval of B5d is extremely long and long,both of which have good liquid crystal properties,the liquid crystal properties of single and two-component systems were studied by POM,DSC and XRD.2.A series of triazinyl hydrazide compounds were synthesized,among which T3b has a good liquid crystal property,hydrogen bond is the main driving force for the formation of T3a gel,and the gel of T3a can also be used for F^-detection.3.A star-shaped phenylhydrazone compound was synthesized,which can form a gel in a non-polar solvent,with hydrogen bonding as the driving force for gel formation.The tetrahydrofuran solution of this substance can distinguish I^-,F^-,Ac O^-,H₂PO₄^-,as well as Mg²⁺,Al³⁺and Cu²⁺.