Benzothiazol Schiff Functional Compound As A Selective Detection

Metals are widely used in people’s production and life, and many metal ions play an important role in life, but also has a great impact on the environment. Therefore, the study of metal ions has been the object of different fields(such as chemistry, environment, life sciences and medical research). Today the recognition and detection of metal ions is a hot research in various systems(such as solutions, soil, cells). Fluorescent sensing technology is becoming more and more popularity because of its advantages of high sensitivity, good selectivity, simple and fast, without breaking the test object and so on. This paper aims to study the benzothiazole fluorescent sensors for mercury and zinc ions. The work was mainly carried out in the following aspects:First, we present a systematic introduction about the structure, characteristics and the reaction mechanism of the fluorescence sensors, further introduce the application, nature and hazards of mercury and zinc ions, and the research status of chemical sensors of mercury and zinc ions.Then, we synthesized 3,9-Dithia-6-azaundecane-2-(Benzothiazol-2--ylimin-omethyl)-phenol(TBT). it as a fluorescent sensor for Hg2+. We studied the influence of solvents, p H, the volume ratio of water and organic solvents, concentration and metal ions interference on the fluorescent properties. Finally we established a high efficiency detection of mercury ions depending on the sensor. Experimental results showed that the maximum wavelength of fluorescence emission of the synthetic sensor is at 484 nm. Under the optimal conditions, the measured concentrations of mercury ions are the range of 0.1 ~ 0.7 μmol ? L-1. There is a good linear relationship between the fluorescence intensity and the concentration of mercury ions, its detection limit of this method was 0.09 μmol ? L-1.Finally, we synthesized2-(Benzothiazol-2-yliminometh--yl)phenol(A)as a fluorescent sensor for Zn2+.We studied the influence of solvents, p H, the volume ratio of water and organic solvents, concentration and metal ions Interference on the fluorescent properties. Finally we established a high efficiency detection of zinc ions depending on the sensor. Experimental results showed that the maximum wavelength of fluorescence emission of the synthetic sensor is at 443 nm. Under the optimal conditions, the measured concentrations of zinc ions are the range of 0.02 ~ 0.35 μmol ? L-1. There is a good linear relationship between the fluorescence intensity, the concentration of zinc ions and its detection limit of this method was 0.02 μmol ? L-1.