一种用于快速检测 Fe 的高效乙基纤维素荧光探针及其多功能应用。
An efficient ethylcellulose fluorescent probe for rapid detection of Fe and its multi-functional applications.
机构信息
Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.
Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Light Industry and Food, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.
出版信息
Spectrochim Acta A Mol Biomol Spectrosc. 2023 Jan 5;284:121767. doi: 10.1016/j.saa.2022.121767. Epub 2022 Aug 18.
Fe is the most abundant essential transition metal ion in the human body, plays a vital role in biological and environmental systems. Ethyl cellulose is one of the derivatives of cellulose. Herein, a novel ethylcellulose fluorescent probe EC-HPCB for detecting Fe was prepared by grafting a flavonol derivative as both fluorophore and selective recognition group. The probe exhibited a highly specific "turn-off" fluorescence response to Fe, and the fluorescence color changed from yellow to colorless in the presence of Fe. The detection limit of EC-HPCB for Fe was 2.65 × 10 mol/L, and the response time was as quick as 2 min. The detection mechanism was confirmed by H NMR and DFT calculations. Based on the good solubility and processability in organic solvent, EC-HPCB was made into coating and film with favorable fluorescent performances. Furthermore, EC-HPCB probe was successfully applied to monitor Fe in real water samples, and the EC-HPCB-loaded filter paper provided a solid-state platform for detecting Fe by naked eye and fluorescence method.
铁是人体中含量最丰富的必需过渡金属离子，在生物和环境系统中起着至关重要的作用。乙基纤维素是纤维素的衍生物之一。本文通过将黄酮醇衍生物作为荧光团和选择性识别基团接枝到乙基纤维素上，制备了一种用于检测 Fe 的新型乙基纤维素荧光探针 EC-HPCB。该探针对 Fe 表现出高度特异性的“关闭”荧光响应，并且在存在 Fe 的情况下荧光颜色从黄色变为无色。EC-HPCB 对 Fe 的检测限为 2.65×10-7mol/L，响应时间快至 2 分钟。通过 1H NMR 和 DFT 计算证实了检测机制。基于在有机溶剂中良好的溶解性和可加工性，EC-HPCB 被制成具有良好荧光性能的涂层和薄膜。此外，EC-HPCB 探针成功应用于实际水样中 Fe 的监测，并且负载 EC-HPCB 的滤纸提供了通过肉眼和荧光法检测 Fe 的固态平台。
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