| With the rapid development of industry,more and more toxic and harmful pollutants are brought about,such as heavy metals,pesticides,organic compounds,et al.Analyzing and monitoring the trace pollutants becomes more and more important in the fields of environmental science and engineering.Take advantage of high sensitivity and selectivity,fluorescence analysis was developed,and fluorescent probe has been widely applied in environmental analytical chemistry.Hydroxyl radical is a powerful oxidant,it reacts with most organic pollutant and also with inorganic compounds.Therefore,hydroxyl radical frequently involved in the treatment of wastewaters by advanced oxidation processes(AOP).It is also believed that hydroxyl radical is an important species for oxidation in biological processes. However,some of the results remain controversial due to the lack of a reliable detection method for hydroxyl radical.In chapter two,a fluorescence probe(R)for hydroxyl radical analysis based on addition reaction between R and hydroxyl radical generated in Fenton systems was described.In optimum conditions,the method can monitor hydrogen peroxide in the range of 1.0×10-6-1.0×10-5mol/L.The method proved to be a simple and sensitive technique for the determination of hydroxyl radicals(·OH).The fluorescence decrement was proportional to the amount of hydroxyl radicals generated from the reaction of Fe(Ⅱ)with H2O2.Based on this mechanism,a new method for the determination of hydroxyl radicals has been developed.The proposed method proved to be simple and sensitive,and it maybe a potentially powerful tool to study the hydroxyl radicals in biological materials.Copper functions as catalysts for enzymatic activity in human bodies.Drinking water containing copper in very small quantities may actually reduce the possibility of deficiencies of copper in the diet.However,water containing amounts higher than 1 mg/L is likely to supply too much of this metal,and there will been a danger of overdose and toxic effect to infants and to people with certain metabolic disorders. Therefore,it is necessary to found efficient methods for determination of Cu(Ⅱ)ions in aqueous solution.In chapter three,an bis-anthracene Schiff base derivative,1,7-bis(anthracen)-9-ylmethylene(BAnth),which behaves as fluorescence probe for the selective determination of Cu(Ⅱ)ions in aqueous medium was synthesized.The results of studies on the prepared fluorescence probe shows that it response extremely high sensitivity and selectivity to Cu(Ⅱ)ions over other metals,and the formation of complex between BAnth and Cu(Ⅱ)ions result in the fluorescence quenching.The prepared fluorescence probe exhibit linear response to Cu(Ⅱ)over the concentration range from 3.0×10-7to 1.0×10-5mol/L,with a detection limit of 4.0×10-8mol/L.The preliminary application result shows that the amount of Cu(Ⅱ)in aqueous solution can be determined successfully by the prepared probe.
|
PDF Full Text Request