Study Of Fluorescent Probes For Metal Ion Based On BODIPY/BINOL Derivatives

The advantage of molecular fluorescent probes for sensing can be summarized: high selectivity, high sensitivity and relatively simple handling. They are widely used as powerful tools to spy on ion and molecular recognition events owing to transferring chemical information of the analyte into fluorescent signals which can be detected by analytical instruments. To design and synthesize of a new fluorophores probe to improve sensitivity and selectivity is still a challenge for the analytical research. In this paper, two fluorescent probes based on BODIPY and BINOL were designed and synthesized to detecte metal ions. The details are summarized as follows:In chapter one, the background of this work was introduced simply, such as the strucrure of fluorescent probe, various fluorescent sensing mechanisms and research of fluorescent probe based on BODIPY and BINOL.In chapter two, a PET-based mercury ions fluorescent probe was designed and synthesized. BHgl was able to recognize Hg2+ sensitively and selectively in methanol. Upon mixing Hg2+in methnol solution, the compound-Hg2+ complexation induces a fluorescent enhancement. Under UV lights, the color of solution changes blue-green. It is designed to chelate with metal ions via its S atoms, as a result, this probe exhibits high selectivity for sensing Hg2+ over other common metal ions.In chapter three, we design and synthesize a simply compound BC1 on chiral BINOL-Schff’s base ligand. The study found that BC1can recognize effectively Cd2+ in ethanol solution. The compound-Cd2+ complexation quenches the fluorescence of BINOL at 457nm and induces a new fluorescent enhancement at 565nm. However, we find that there is no such phenomenon when some heavy metals and transition metal ions were added.