Preparation And Properties Of Novel Fluorescence Sensor Smart Materials For Ions

In this paper, we have designed and synthesized an organogelator 3,4,5-tris 1-naphthalene(hexadecyloxy) benzo-hydrazone(G) based on summarized many previous work in supramolecular chemistry, G could formed stable organogel(OG) in DMF, ethanol, 1-propyl alcohol, n-butyl alcohol, isoamyl alcohol. While upon the addition of Cd2+ to the G ethanol organogel, the OG could form a stable Cd2+-coordinated supramolecular metallogel(Cd G) accompanied by strong brilliant blue fluorescence emission. When upon addition of I- into the Cd G, the fluorescence changed, but upon addition of F-, Cl-, Br-, Ac O-, H2PO4-, CN-, N3-, SCN-, HSO4- and Cl O4- to the Cd G have not the same change, the total process under gel-gel states. The film of the Cd G have same properties, when upon addition of I- to the Cd G the fluorescence quenched. Therefor, the Cd G not only could act as a convenient highly selective and sensitive I- detection test but also is a nove gel materials.When upon addition of Mg2+ to the OG, the OG could form a stable supramolecular metallgel Mg G in ethanol accompanied by brilliant blue fluorescence emission.(1) Then upon addition of Cu2+ to the metallgel Mg G in ethanol, the Mg G could form a stable bimetallgel Mg Cu G accompanied by fluorescence quench. The anion response capability of the metallogel Mg Co G was primarily investigated by adding 5 equiv.of various anions(F-, Cl-, Br-, I-, Ac O-, H2PO4-, N3-, SCN-, HSO4-, CN-, Cl O4-, using their sodium salts water solution as the sources) in water to the Mg Cu G. When upon the addition of CN- in water to the Mg Cu G with the diffusion of CN-, the Mg Cu G emitted strong brilliant blue fluorescence emission, but the others have not the same phenomenon. In addition, the film of the Cd G have same properties, the total process under gel-gel states.(2) Then upon addition of Co2+ to the metallgel Mg G in ethanol, the Mg G could form a stable bimetallgel Mg Cu G accompanied by fluorescence quench. The anion response capability of the metallogel Mg Cu G was primarily investigated by adding 5 equiv.of various anions(F-, Cl-, Br-, I-, Ac O-, H2PO4-, N3-, SCN-, HSO4-, CN-, Cl O4-, using their sodium salts water solution as the sources) in water to the Mg Cu G. When upon the addition of Co- in water to the Mg Cu G with the diffusion of Co-, the Mg Cu G emitted strong brilliant blue fluorescence emission, but the others have not the same phenomenon. In addition, the film of the Cd G have same properties, the total process under gel-gel states.(3) Then upon addition of Fe3+ to the metallgel Mg G in ethanol, the Mg G could form a stable bimetallgel Mg Fe G accompanied by fluorescence quench. The anion response capability of the metallogel Mg Cu G was primarily investigated by adding 5 equiv.of various anions(F-, Cl-, Br-, I-, Ac O-, H2PO4-, N3-, SCN-, HSO4-, CN-, Cl O4-, using their sodium salts water solution as the sources) in water to the Mg Cu G. When upon the addition of H2PO4- in water to the Mg Cu G with the diffusion of H2PO4-, the Mg Cu G emitted strong brilliant blue fluorescence emission, but the others have not the same phenomenon. In addition, the film of the Cd G have same properties, the total process under gel-gel states.Thus, bimetallgel Mg Cu G, Mg Co G, Mg Fe G and their films could act as a high selective and sensitive sensor for CN-, Cl-, H2PO4-, respectively, and without interference in whole process. The Mg Cu G, Mg Co G, Mg Fe G bimetallgel not only are novel smart materials, which could act as a convenient sensor for CN-, Cl-, H2PO4-, and the detection limit for CN-, Cl-, H2PO4- is 10-5 M or under the value, but aslo efficient, respectively.In addition, we have designed and synthesized a sensor based on double-schiff base for F-, the sensor have high sensitivity and selectivity for F-. The sensor S in DMSO could detect F- from water. Thus, the sensor S could detect F- from drinking water and have the potential application value.