The Fluorescence Turn-on Sensors For Detection Of Hg²⁺ Or Peroxides Based On Forming Of The High Quantum Yield Luminophore

Mercury ion and peroxide are widely used in various areas,they are destroying human?s health.Mercury ion has been reported in the literature that mercury exposure can have a number of severe adverse effects on health,such as brain damage,kidney failure,and various cognitive and motion disorders.The stability of organic peroxide is poor,and it is very easy to explode when the collision,friction and heat are heated.Therefore,it has important theoretical and practical significance to the detection of these two kinds of dangerous objects.In many detection methods,owing to the operational simplicity,low cost,real time monitoring and high sensitivity,fluorescence chemosensors have become the dominant strategy for molecular recognition such as metal ions,anions,mercaptans,reactive oxygen species,amino acids and explosives.In this paper,the fluorescence chemical sensor is used to detect the mercury ions and organic peroxide.The main work of this paper is as follows:A ionized thiohydrazide sensing molecule,baced on PBD,is designed and synthesized.The sensing properties are researched by UV-Vis absorption and fluorescence emission spectra.In result,the sensing molecular has disappeared visible light absorption peak and weakened fluorescence intensity in the presence of mercury ion.The hydrazide sensing molecule is multifunction with ferrocene groups.Double and single substituted cyclopentadienyl iron thio hydrazide derivatives were synthesized.The fluorescence and electrochemical are detected mercury ions by the combination of them.Fluorescence spectrophotometric method was used to study the fluorescence properties,and the electrochemical sensing properties of mercury ion were studied by electrochemical method.Studying the properties of two sensors,including the response time,the linear range and mechanism.Lastly,Peroxide-based explosives,like Hydrogen peroxide(H2O2),Benzoyl peroxide(BPO),Chlorine peroxide between benzoic acid(m CPBA)are important targets for detection because of their broad use in improvised explosives but pose challenges.A new turn-on fluorescent sensor based on Al3+/ 8-Quinolinylboronic acid was developed for detection of H2O2 and other organic peroxides.The experimental results showed that good selectivity and high sensitivity under the optimized experimental conditions.Finally,the sensing mechanism is studied by ~1H-NMR.