Synthesis, Characterization And Properties Study Of Novel Chemosensors Based On Schiff-base

With the rapid development of industry, various metal materials have been widely used. As a result, a great deal of waste from the metal material factories was poured into the environment. Some enterprises are incapable of treating the effluent and preventing direct emission, which gradually increases the content of metal ions in the water and soil. Some metal ions are not biodegradable and can enter the human body through the food chain. Some heavy metal ions such as mercury, lead, and cadmium are harmful to human's health. If the concentration of any heavy metal ions exceeds a certain extent, it may bring people a disease or even death. So it is significative to develop an effective tool to detect the metal ions for the environment and human health. Chemosensor gains more and more attention for its high selectivity and sensitivity and easy operation. For the structure of schiff base is relatively simple to synthesize, we designed and synthesized three kinds of chemosensor L1, L2, L3. We found that each chemosensor owned high selectivity and anti-interference ability to Fe3+, Cu2+, Al3+, respectively. This dissertation consisted of four chapters:Chapter1:The mechanism of the chemosensor to detect metal ions and a brief review on the chemosensor for Fe3+, Cu2+, A13+Chapter2:The synthesis of chemosensor L1for Fe3+. Its structure was characterized by elemental analysis, FT-IR and1HNMR. It displayed a high selectivity and sensitivity for the Fe3+via UV and fluorescence analysis method. The1:1binding mode of the sensor with Fe3+was revealed by Job's Plot.Chapter3:The synthesis of chemosensor L2for Cu2+. Its structure was characterized by elemental analysis, FT-IR,1HNMR,13CNMR. It displayed a high selectivity and sensitivity for the Cu2+via UV and fluorescence analysis method. The1:1binding mode of the sensor with Cu2+was revealed by Job's Plot,Chapter4:The synthesis of chemosensor L3for Al3+. Its structure was characterized by elemental analysis, FT-IR and1HNMR. It displayed a high selectivity and sensitivity for the A13+via UV and fluorescence analysis method. The1:1binding mode of the sensor with Al3+was revealed by Job's Plot.