Synthesis And Properties Of Fluorescent Probes Based On Pyrene Unit

The development of artificial receptors for the sensing and recognition of environmentally and biologically important species has been actively investigated in recent years. In this regard, chemosensors that can highly sensitively and selectively detect heavy and transition metal ions (HTM) such as Hg2+, Pb2+, Cd2+, and Cu2+ are especially important. In the course of the study of these probes, there is often mutual interference between the ions, especially between Hg2+ and Cu2+ mutual interference. Based on this constraint, the selectivity of the probe is often not very effective breakthrough.In this dissertation, two probes (SCY-1) have been developed, in which pyridine-piperazine unit is utilized as binding subunit, pyrene as signaling subunit linked with amide group. Their chemical structures were characterized by 1HNMR,13CNMR and HRMS.The monomer-excimer emission was studied with fluorescence emission spectra including the selective recognition of mercury and copper ions. It has also been demonstrated that SCY-1 is suitable for use in neutral and alkaline metal ions as selective recognition, and compounds SCY-1 and Hg2+ coordination ability and are stronger than Cu2+. The detection limit of SCY-1 to Hg2+ is 1.2×10-6M and that to Cu2+ is 3.2×10-6M. The coordinated ways of SCY-1 to the two ions are both 1:2.For the limitation of solubility, the test of SCY-2 can not be conducted. We haven't achieve the expected effect.