Studies Of Synthesis And Properties Of Double Channel Metal Ion Sensors Based On Diarylethene

Diarylethenes,one of the most promising photoresponsive molecules,have been widely applied in optical memory devices,molecular switches,logic gates,chemosensors,bioimaging fields,because of their outstanding photochromism,prominent fatigue resistances,brilliant thermal stability,and rapid responses.In this thesis,three chemosensors with excellent photochromism were synthesized by introducing fluorescent group or ion recognition group into the side group of the diarylethene molecule by chemical reaction.Chapter one,the research situation of the sensors were summarized,the research progress of the diarylethenes were introduced,the design of the paper was explained.Chapter two,the reactive group furan-carbohydrazide was introduced into the diarylethene structure,The compound recognizes Ca²⁺and Sr²⁺by the fluorescence remarkably enhanced.Which exhibits multiple response properties under the control of ions and light.In addition,the sensor can be applied to detect Ca²⁺and Sr²⁺in practical samples,and the recoveries is within the allowable range of error.Chapter three,the ion recognition group was introduced into the diarylethene structure to obtain Hg²⁺colorimetric sensor.The sensor exhibits excellent anti-interference and can be applied to detect Hg²⁺in practical samples,and the recoveries is within the allowable range of error.Chapter four,the N-aminophthalimide unit was attached to the diarylethene structure to get a sensor with multiple responses.The compound can be used as a fluorescence sensor for Cd²⁺.This compound can also be used as a colorimetric sensor for Cu²⁺.Besides,the detection limit of the two ions is very low,and can be applied to detect Cd²⁺and Cu²⁺in practical samples.Chapter five,the conclusion of this thesis.