Synthesis And Properties Of Some Novel Fluorescent Chemosensor

Various ions are playing an important role in biology, medicine and the environment, such as, heavy metals (in particular mercury, lead, chromium, plasma), because of their irreversible damage to the physical life and the ecological balance of the entire water system (even if the trace exists), was particularly concerned. In addition, with the development of the biological, pharmaceutical science, chemistry and environmental science, anions is playing more and more important roles in these areas, therefore, it has significant meaning to detect the ions timely. Great advantage has been found to the fluorescence sensor in the aspects of sensitiveness, selectivity and real time original place detecting etc., the level of real time detecting has aroused great interest of the chemist, the biologist, clinical biochemist, and the environmentalist.Rhodamine is favored by the scientists from home and abroad for its rigid coplanar structure, strong structure stability, when acting on exciting light, before 500 ~ 700 nm places but intense fluorescence of longevity, the disturbance stops waiting for merit after measuring thing background , that it's lactam is similar to a compound is the fine "OFF-ON" type fluorescence sensor mother's body , so favored by domestic and foreign scientific added.With coumarin-based fluorescent sensor is this year a new research hotspot. The Coumarin usually is similar to the fluorescence regiment for benzo pyrane ketone structure, whose actinochemistry character stabilize, quantum productivity, Stock displacement of a large , optical physics and the actinochemistry character are adjustable, the incense bean usually has and very good cell compatibility, are that the fluorescence sensor molecule designs that wait for the selections fluorescence regiment excellence in whose structure element can pass through cytomembrane .This paper designed and synthesized a series of ion receptors, by their fluorescence spectra of different ion-selective recognition properties and photochemical sensing performance. 1. Ion recognition and fluorescence sensingThis chapter summarizes and coumarin fluorophore rhodamine-based ion sensor research.2. Based on rhodamine, coumarin fluorescence sensor synthesis and properties of the sensor researchA series of new chapter based on rhodamine, coumarin fluorophore metal ion fluorescence sensor. After 1H NMR, 13C NMR and elemental analysis confirmed the detection of its structure. UV-vis and fluorescence spectroscopy of the receptor with various cations (Cu2+, Ba2+, Hg2+, Zn2+, Mg2+, Ce3+, Cd2+, Fe3+, Ag+, Co2+, Ni2+, Ca2+) the nature of the interaction. The results showed that: receptors on one or two metal ions with high selectivity.3. Based on 1,8-anthraquinone diamine fluorescence sensor synthesis and properties of the sensor researchThis chapter contains a synthesis of a novel anthracene fluorophore and sulfonamide anion receptors 3-1, inspection methods such as 1H NMR, 13C NMR, elemental analysis prove its structure, the use of fluorescence spectroscopy, 1H NMR titration of the receptor and the nature of the interaction of various anions. The results show that the receptor have has good selective recognition function to F-, and form 1:1 complexes with F-.