一种荧光识别氟离子传感器及其制备和应用

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.
本发明提供了一种高选择性荧光识别氟离子的传感器,属于阴离子检测领域。该传感器是以对苯二甲酸和邻苯二胺为底物,多聚磷酸为催化剂,磷酸为脱水剂,在氮气保护下,于160~200℃下搅拌反应5~6h,产物倾入蒸馏水中,用碱液调节pH值至8~9,抽滤,水洗,干燥,重结晶,得到土黄色目标产物。实验表明,在传感器分子的DMSO溶液中;分别加入F-、Cl-、Br-、I-、AcO-、H2PO4-、HSO4-、ClO4-和SCN-的DMSO溶液,发现只有F-的加入使得溶液在紫外灯下发出显著的蓝色荧光。因此,该传感器可用于F-的荧光快速检测,而且这一识别过程不受其它阴离子的干扰。为了便于实际应用,本发明还制作了基于该传感器的氟离子检测试纸。

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