Abstract Herein, a fluorescence sensor based on the fluorescence quenching phenomena was developed by the functionalization of Pyranine molecules over the surface of carbon nanotubes (Pry-CNTs) for quick, selective and sensitive detection of Fe3+ ion. The change in the emission along with the Fluorescence Quenching response was found linearly comparative to the Fe3+ ion concentration in the range of 0.1−10 μM, with the limit of detection of 0.2 μM. The Fluorescence study proved the coordination interaction between Fe3+ ion and Pry-CNTs lead to the recognition process. The developed fluorescence sensor is the simple and selective link for the determination of Fe3+ ion. The recovery of this method in the determination of Fe3+ ion in real water samples was found to be 99.5–100 %. This fluorescence sensor (Pyr-CNTs) can be used as a sensor for Fe3+ ion and promote for many applications in the environmental, chemical and biological systems.

中文翻译：

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用于选择性检测 Fe3+ 离子的基于碳纳米管的水溶性荧光传感器

摘要 在此，通过在碳纳米管 (Pry-CNTs) 表面上的吡喃分子的功能化，开发了一种基于荧光猝灭现象的荧光传感器，用于快速、选择性和灵敏地检测 Fe3+ 离子。发现随着荧光猝灭响应的发射变化与 Fe3+ 离子浓度在 0.1-10 μM 范围内线性比较，检测限为 0.2 μM。荧光研究证明了 Fe3+ 离子和 Pry-CNTs 之间的配位相互作用导致了识别过程。开发的荧光传感器是测定 Fe3+ 离子的简单且选择性的环节。发现该方法在测定实际水样中的 Fe3+ 离子时的回收率为 99.5-100%。