This paper describes the synthesis of poly(1‐aminonaphthalene) and its application as a chemosensor for detection of Fe³⁺ using the naked eye and a fluorimetric method. The conjugated polymer was synthesized by chemical oxidative polymerization using FeCl₃ as a catalyst. The response of the polymer towards various metal ions was investigated using colorimetric detection, and ultraviolet–visible and fluorescence spectroscopies. The polymer displayed high selectivity and sensitivity towards Fe³⁺ compared with other metal ions. A significant colour change from purple to yellow was observed upon addition of Fe³⁺ by the naked eye. The polymer also showed a high selectivity and sensitivity ‘turn‐off’ fluorescence response towards Fe³⁺ ions. A good linear response was obtained for Fe³⁺ concentrations in the range 10–50 mg L⁻¹ with a detection limit of 1.04 mg L⁻¹. The proposed chemosensor was applied for determination of Fe³⁺ content in water samples and satisfactory results were obtained.

中文翻译：

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基于氨基萘的比色和荧光传感器，用于选择性识别水中的Fe3 +。

本文介绍了聚（1-氨基萘）的合成及其作为肉眼和荧光法检测Fe ³⁺的化学传感器的应用。使用FeCl ₃作为催化剂通过化学氧化聚合来合成共轭聚合物。使用比色检测，紫外可见光谱和荧光光谱研究了聚合物对各种金属离子的响应。与其他金属离子相比，该聚合物显示出对Fe ^3+的高选择性和敏感性。用肉眼观察到添加Fe ^3+后，观察到从紫色到黄色的明显颜色变化。该聚合物还显示出对铁的高选择性和灵敏度“关闭”荧光响应³⁺离子。Fe ³⁺浓度在10–50 mg L ^-1范围内具有良好的线性响应，检出限为1.04 mg L ^-1。提出的化学传感器用于水样中Fe ³⁺含量的测定，结果令人满意。