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首页> 外文期刊>New Journal of Chemistry >Off-on fluorescent polyanthracene for recognition of ferric and fluoride ions in aqueous acidic media: application in pharmaceutical and environmental analysis
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Off-on fluorescent polyanthracene for recognition of ferric and fluoride ions in aqueous acidic media: application in pharmaceutical and environmental analysis

机译：离线荧光聚蒽，用于识别水性酸性介质中的铁离子和氟离子：在药物和环境分析中的应用

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摘要

Fluorescent polyanthracene prepared by a chemical oxidative route was shown to sense ferric ions (Fe~(3+)) in aqueous acidic solutions. The fluorescence titration indicates that the intensity of fluorescence of the polyanthracene (PAT) was gradually quenched by the successive addition of an Fe~(3+) ion solution ('Off-fluorescence'). The fluorescence quenching data fit well into the conventional Stern-Volmer relationship. A mechanism of Photoinduced Electron Transfer (PET) is proposed to explain the observed 'Off fluorescence' state of the PAT. Based on the strong affinity of Fe~(3+) to F~- ions, the mixture of polyanthracene-F~- ions exhibiting 'On fluorescence', could behave as a fluorescent 'On type probe'. Thus a method using a single probe for the detection of both Fe~(3+) and F" ions is developed using a fluorescence 'Off-On' approach, and is successfully applied for the determination of these ions in commercial samples.
机译：通过化学氧化法制得的荧光聚蒽在酸性水溶液中能感应出三价铁离子（Fe〜（3+））。荧光滴定表明，通过连续加入Fe〜（3+）离子溶液，聚蒽（PAT）的荧光强度逐渐被淬灭（'Off-fluorescence'）。荧光猝灭数据很好地符合常规的斯特恩-沃尔默关系。提出了一种光致电子转移（PET）的机制来解释所观察到的PAT的“关闭荧光”状态。基于Fe〜（3+）对F〜离子的强亲和力，表现出“ On荧光”的聚蒽-F〜-离子混合物可以充当荧光“ On型探针”。因此，使用荧光“ Off-On”方法开发了一种使用单个探针同时检测Fe〜（3+）和F“离子的方法，并成功地用于测定商业样品中的这些离子。

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