Design,Synthesis And Ion Recognition Of Diarylene Compounds Containing Acylhydrazone Schiff Base

The potential applications of diarylethene compounds in information storage initially aroused research interest.Because of its extremely high recording speed,density and resolution,it has been used as a photovoltaic material in many research fields.In recent years,diarylethylene compounds with optical switching characteristics and chemical sensing characteristics have attracted more and more attention.The application of diarylethylene compounds in chemical sensors involves many fields such as molecular switching,ion recognition,and cell imaging.In terms of ion recognition,the combination of diarylethylene compounds with excellent optical properties and groups with recognition properties has great research value in future application prospects.In this paper,7-?diethylamino?-3-acyl-coumarin groups are combined with different diarylethylene units to synthesize Schiff bases to synthesize three diarylene compounds.By changing the recognition sites in the molecular structure,the recognition function of diarylene compounds as probes is regulated.The structures of these three diarylene compounds were characterized by ¹H NMR,IR,HRMS and other methods,and their optical properties and ion sensing properties were thoroughly explored.The test results show that:1)The two diarylene compounds DTE-1 and DTE-2exhibit significant photochromic properties in methanol and dimethylsulfoxide solvents,respectively.Compound DTE-3 has poor photochromic properties.2)All three compounds have cation recognition capabilities.Due to the difference in structure,the compound DTE-1 has a Fe³⁺fluorescence quenching recognition in methanol,which can be used as a unique Fe³⁺fluorescence sensor;when the compound DTE-2 uses dimethylsulfoxide as a solvent,Cu²⁺induces red shift in the ultraviolet spectrum And fluorescence quenching phenomenon,therefore,it can be used as a chemical sensor for the dual-channel detection of Cu²⁺;while the compound DTE-3 has Cu²⁺fluorescence quenching and Al³⁺fluorescence enhancement recognition in dimethyl sulfoxide;By comparing the test results of DTE-1,DTE-2and DTE-3,the properties are optimized and the expected assumptions are completed.3)According to the ion recognition properties of the three substances,the quantitative analysis of ions in real water samples was achieved through the standard addition method,and at the same time,the test strip detection was completed.