Highly selective "turn-on" fluorescent sensing of fluoride ion based on a conjugated polymer thin film-Fe(3+)complex
Highly selective "turn-on" fluorescent sensing of fluoride ion based on a conjugated polymer thin film-Fe(3+)complex
复制标题
基于共轭聚合物薄膜-Fe(3)络合物的高选择性氟离子“开启”荧光传感
DOI：
10.1016/j.aca.2017.02.027
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发表时间：
2017
影响因子：
6.2
通讯作者：
Zhang Zhouxiang
中科院分区：
文献类型：
--
作者：
Ding Wanchuan;Xu Jingkun;Wen Yangping;Zhang Jie;Liu Hongtao;Zhang Zhouxiang
通过将相应的电活性单体M直接电聚合到ITO电极表面，设计了一种新型荧光共轭聚合物薄膜传感器，并将该薄膜- fe3 +配合物用于水环境样品中氟离子（F−）的高选择性检测。该薄膜作为选择性关断荧光传感器能够有效地检测Fe3+，并表现出良好的可逆性。该薄膜在Fe3+存在下，对F−具有高度选择性的开启反应，荧光强度增强了5倍。F−在10 μM ~ 3 mM的较宽浓度范围内测定，检测限为6.78 μM (0.128 ppm)，检测方法简单灵敏。荧光分析成功地证明了膜- fe3 +络合物在环境水样中测定F−水平的分析适用性，结果令人满意。这一策略将为新型分子传感装置的便捷设计和在环境中的实际应用提供新的途径。
We designed a new fluorescent conjugated polymer thin film sensor via direct electropolymerization of the corresponding electroactive monomer M onto the surface of ITO electrode, and the thin film-Fe3+complex was used for the highly-selective detection of fluoride ion (F−) in water environmental samples. The as-obtained thin film could effectively detect Fe3+as a selective turn-off fluorescent sensor, and exhibited outstanding reversibility. This film in the presence of Fe3+showed a highly selective turn-on response toward F−over other anions with a 5-fold enhancement in the fluorescence intensity. F−with a relatively wide concentration range from 10 μM to 3 mM could be determined in a rather simple and sensitive manner with a detection limit of 6.78 μM (0.128 ppm). Analytical applicability of the film-Fe3+complex for determining the levels of F−in environmental water samples has been successfully demonstrated by fluorescent analysis with satisfactory results. This strategy will provide a new approach for the facile design of new molecular sensing devices and practical application in environments.