| 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. One of the most important and imminent mission of environmental analytical chemistry is to investigate a new analysis method with convenience, quickness and precision. To adress the problem, Fluorescence analysis was developed. It has been widely applied due to its exclusive advantages.In this thesis, new fluorescence carriers with terminal double bounds and good sensitivity to some analysts of interest were synthesized and copolymerized under UV irradiation on the silanized glass to prepare fluorescence chemical sensors, which were designed to detect chemical ions and compounds. Three different sensors prepared in the experiment were studied. (1) N-(2- methacryloxyethyl) benzo[k,l]thioxanthene-3,4-dicarboximide (MBTD, insensitive to halide) was synthesized and copolymerized under UV irradiation on the surface of silanized glass with Quine (sensitive to halide) to prepare a internal ratiometric sensor for determination of halide ions. The linear equations for halid ions determination were obtained with excellent relativity. The linear ranges for Cl-,Br-,I- were 3.0×10-4～0.060 mol/L, 3.0×10-4～0.060 mol/L, 2.0×10-4～0.0060 mol/L, respectively. The detection limits were very low and they were 2.2×10-4 mol/L, 7.5×10-5 mol/L, 6.2×10-5 mol/L, for Cl-,Br-,I- respectively. (2) N-allyl-4-(4'-methyl-piperazinyl)-1, 8-naphthalimide (ANPN, sensitive to pH) was synthesized and copolymerized under UV irradiation on the surface of silanized glass with Thioxanthenes derivative (MBTD, insensitive to pH) to prepare an internal ratiometric sensor for pH determination. The linear equations wasα= -0.3348pH + 3.6251, and the linear range was pH 5.00～9.75. (3) 4'-N, N- dimethylamino-4- methylacryloylamino chalcone (DMC, sensitive to solvent polarity) was synthesized and copolymerized on the surface of silanized glass to prepare a sensor for water content determination in organic solvents. The linear equations for Actone, Ethanol and Acetonitrile were obtained with excellent relativity. The linear range was 0%～6%. The detection limits for Actone, Ethanol and Acetonitrile were 0.006%, 0.008%, 0.002%, respectively.Additionally, the three prepared sensors were characteristic of satisfactory reproducibility, reversibility, selectivity, short response time. Espectially, it allowed a high degree of mechanical flexibility and photostability. The proposed sensing membrane systems were applied to detect actual samples. |
PDF Full Text Request