Study On Fused Heterocyclic Fluorescence Probes For Metal Ions / Anions

Design and synthesis of fluorescent probes is one of the important research subject of analyze chemistry and supramolecular chemistry. In the past twenty years, fluorescent probes for a variety of cation and anion recognition has attracted extensive interest. As fluorescent probes the recognition of ions with high sensitivity, good selectivity, and can also realize the advantages of in situ detection, in industry, agriculture, medicine, archaeology, mineralogy, widely used in many fields such as environmental testing, make it become a hot research at home and abroad.This paper mainly focuses on the following several aspects:1. This paper use a variety of synthetic route, designed and synthesized with thick heterocyclic is the ramification of fluorescent groups of small molecules, the particular structure, with characteristics of probe compounds.2. The role of stability constants and mechanism were confirmed by titration spectra, IR, 1H NMR, API-ES and ITC experiments.3. Results show that the target compounds of certain metal ions have good optical probe nature, because of the different structure and presents different characteristics.Probes 1 can be used as a selective chemosensor for Fe3+ and F-, Probe 2 exhibits a unique ratio of fluorescence recognition performance, and showed good selectivity for recognition of Al3+ and F-, can be used as colorimetry/fluorescence By contrast, on coordination of Al3+ or F-, probe 2 afforded strong fluorescence. A reversible “off-on” optical switching mode has been constructed by sequential inputs from Al3+ and F- ions to the probe 2 via different excitation and emission wavelengths. Probe 3 showed a good recognition for recognition of Al3+. Respectively on 1, 10-Philippines then moiety to benzene and imidazole, benzothiazole, benzene and pbo, probes of 4, 5 and 6 can be used as a selective chemosensor for Zn2+、Pb2+and Cd2+. For anion recognition: probe 4 has a specific selection for F-, can be used as fluorescence quenching probe.Organism ketoneses design was synthesized a series of derivatives molecular which is a kind of can not only to certain metal ions, but also exclusive response to certain anionic fluorescent and colorimetric probe; Benzo thiazole class fluorescent probe can identify metal ion, anion recognition has a choice. Research results show that the different molecular structure, or a different fluorescent groups build probe has high degree of choice and sensitivity to identify objects, as metal ions and anions detection of chemical sensor application value. For the design, novel structure, superior performance of fluorescence probe and fluorescence materials for basic research.