A cost-effective and practical polybenzanthrone-based fluorescent sensor for efficient determination of palladium (II) ion and its application in agricultural crops and environment
A cost-effective and practical polybenzanthrone-based fluorescent sensor for efficient determination of palladium (II) ion and its application in agricultural crops and environment
复制标题
一种经济实用的聚苯并蒽酮荧光传感器，用于高效测定钯（II）离子及其在农作物和环境中的应用
DOI：
10.1016/j.aca.2013.10.054
复制
发表时间：
2013-12-17
影响因子：
6.2
通讯作者：
Yang, Jun
中科院分区：
文献类型：
--
作者：
Zhang, Ge;Wen, Yangping;Yang, Jun
利用聚苯并蒽酮（PBA）成功制备了一种适用于实际测量农作物和环境样品中钯离子（Pd²⁺）的高选择性和高灵敏度荧光化学传感器。PBA是在乙腈和三氟化硼乙醚混合电解质中简易电合成的。PBA的荧光强度在5 nM - 0.12 mM的浓度范围内对Pd²⁺呈线性响应，检测限为0.277 nM，定量限为0.925 nM。使用农作物和环境中存在的不同化合物，如常见金属离子、阴离子、天然氨基酸、碳水化合物和有机酸来检测所制备传感器的选择性，在这些干扰物及其混合物中未观察到明显的荧光变化。提出了一种可能的机制，即PBA与Pd²⁺的配位增强了聚合物链的聚集，导致PBA发射显著猝灭，这通过吸收光谱监测和透射电子显微镜进一步得到证实。所提出传感器的优异性能以及实际样品中Pd²⁺测定的令人满意的结果表明，基于PBA的用于测定Pd²⁺的荧光传感器将是在农业和环境中应用的良好候选者。（C）2013爱思唯尔B.V.保留所有权利。
A highly selective and sensitive fluorescent chemosensor suitable for practical measurement of palladium ion (Pd2+) in agricultural crops and environment samples has been successfully fabricated using polybenzanthrone (PBA). PBA was facilely electrosynthesized in the mixed electrolyte of acetonitrile and boron trifluoride diethyl etherate. The fluorescence intensity of PBA showed a linear response to Pd2+ in the concentration range of 5 nM-0.12 mM with a detection limit of 0.277 nM and quantification limit of 0.925 nM. Different compounds existing in agricultural crops and environment such as common metal ions, anions, natural amino acids, carbohydrates, and organic acids were used to examine the selectivity of the as-fabricated sensor, and no obvious fluorescence change could be observed in these interferents and their mixtures. A possible mechanism was proposed that the coordination of PBA and Pd2+ enhance the aggregation of polymer chains, which led to a significant quenching of PBA emission, and this was further confirmed by absorption spectra monitoring and transmission electron microscopy. The excellent performance of the proposed sensor and satisfactory results of the Pd2+ determination in practical samples suggested that the PBA-based fluorescent sensor for the determination of Pd2+ will be a good candidate for application in agriculture and environment. (C) 2013 Elsevier B. V. All rights reserved.