Ding Xingli, Sheng Li, Zhang Ge, Ji Min, Li Yu
School of Environmental Science & Engineering, Tianjin University, Tianjin 300350, China.
Jiangxi Provincial Engineering Research Center for Waterborne Coatings, School of Chemistry and Chemical Engineering, Jiangxi Science & Technology Normal University, Nanchang 330013, China.
Molecules. 2024 Feb 20;29(5):925. doi: 10.3390/molecules29050925.
Fluorescent film sensors are ideal for the real-time outdoor detection of heavy metal ions of Fe, but they are limited because of their low sensitivity and long response time due to their special structure. In this work, we constructed a fluorescent hydrogel for the specific detection of Fe, utilizing poly(9-fluorenecarboxylic acid) (PFCA) as the sensing moiety and sodium alginate (SA) as the cross-linking substrate, which exhibited a rapid and selective recognition of Fe among a panel of 16 anions and 21 cations. It can sense Fe at 0.1 nM immediately owing to the porous network structure of the film that provided enhanced ion transport channels and active sites, and the "molecular line effect" of polymer PFCA. Moreover, we successfully applied this platform to detect Fe in four different vegetable samples. This work provides an innovative and effective strategy for fabricating green and sustainable fluorescent sensors.
荧光薄膜传感器是用于实时户外检测铁重金属离子的理想选择，但由于其特殊结构导致灵敏度低和响应时间长，限制了其应用。在这项工作中，我们构建了一种用于特异性检测铁的荧光水凝胶，利用聚（9-芴羧酸）（PFCA）作为传感部分，海藻酸钠（SA）作为交联底物，该水凝胶在16种阴离子和21种阳离子中对铁表现出快速且选择性的识别。由于薄膜的多孔网络结构提供了增强的离子传输通道和活性位点，以及聚合物PFCA的“分子线效应”，它能够立即检测到0.1 nM的铁。此外，我们成功地将该平台应用于检测四种不同蔬菜样品中的铁。这项工作为制造绿色可持续的荧光传感器提供了一种创新有效的策略。
