Fluorescence identifying fluorinion sensor and preparation and application thereof

Abstract

The invention provides a high-selectivity fluorescence identifying fluorinion sensor and belongs to the field of anion detection. The sensor takes terephthalic acid and o-phenylenediamine as substrates, polyphosphoric acid as a catalyst and phosphoric acid as a dehydrant, the materials are stirred and reacted at the temperature of 160-200 DEG C for 5-6 hours, the product is poured into distilled water and regulated with an alkaline liquor to enable the pH value to be 8-9, then the mixture is subjected to suction filtration, water washing, drying and recrystallizing to obtain a yellow target product. Experiment shows that only the addition of F- makes the solution emit remarkable blue fluorescence under an ultraviolet lamp after F-, Cl-, Br-, I-, AcO-, H2PO4-, HSO4-, ClO4- and SCN- are respectively added into a DMSO (dimethyl sulfoxide) solution of sensor molecules. Therefore, the sensor can be used for the rapid fluorescence detection of F-, and in addition, the identifying process is not affected by other anions. To facilitate practical application, the invention further manufactures a piece of fluorinion test paper based on the sensor.

Description

technical field [0001] The invention belongs to the field of anion detection and relates to a fluoride ion sensor, in particular to a sensor for highly selective fluorescence identification of fluorine ions; the invention also relates to the synthesis of the fluorine ion sensor and its application in identifying fluorine ions. Background technique [0002] Fluorine widely exists in soil, natural water, animals and plants. In the natural environment, fluorine mainly exists in the form of fluorite, and its main components are fluorine compounds such as aluminum fluoride, calcium fluoride, sodium fluoride, and calcium fluorophosphate. At the same time, most of the foods we drink contain certain amount of fluorine. Since fluorine is one of the essential trace elements for the human body, it plays an irreplaceable role in the formation of tooth enamel, bone tissue, and calcium and phosphorus metabolism, so an appropriate amount of fluorine is essential to maintain the developmen...

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