A reversible fluorescence sensor based on insoluble β-cyclodextrin polymer for direct determination of bisphenol A (BPA)

A reversible fluorescence sensor based on insoluble β-cyclodextrin polymer for direct determination of bisphenol A (BPA)
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基于不溶性β-环糊精聚合物的可逆荧光传感器,用于直接测定双酚A (BPA)

DOI:
10.1016/j.snb.2005.06.020
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发表时间:
2006-04
影响因子:
8.4
通讯作者:
--
中科院分区:
化学1区
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--
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基于不溶性β-环糊精聚合物(β-CDP)和双酚A(BPA)之间的可逆识别反应,提出了一种用于连续监测BPA的分叉光纤化学传感器。当固定在 5μm 厚的增塑聚氯乙烯膜中时,β-CDP 将水溶液中的 BPA 萃取到本体膜相中,并与分析物反应形成具有高荧光效率的包合物。复合物的形成显着增强了 BPA 的固有荧光(λex/λem=286nm/312nm),适合于发出主客体识别相互作用发生的信号。该荧光传感器的动态检测范围为6.0×10−6mol/L至1.0×10−3mol/L,检测限为1.0×10−6mol/L。传感器对 BPA 的高选择性取决于 β-CD 单元的协同屏蔽效应以及主体和客体之间的最佳空间匹配。该传感器已成功用于水样中 BPA 的测定。
Based on the reversible recognizing reaction between insoluble β-cyclodextrin polymer (β-CDP) and bisphenol A (BPA), a bifurcated optical fiber chemical sensor has been proposed for continuous monitoring of BPA. When immobilized in a plasticized poly(vinyl chloride) membrane of 5μm thickness, β-CDP extracts BPA from aqueous solutions into the bulk membrane phase and reacts with the analyte to form an inclusion complex with high fluorescence efficiency. Formation of the complex gives a significant enhancement of the intrinsic fluorescence (λex/λem=286nm/312nm) of BPA which is suitable for signaling the occurrence of the host–guest recognizing interaction. The fluorescence sensor exhibits a dynamic detection range from 6.0×10−6mol/L to 1.0×10−3mol/Lwith a detection limit of 1.0×10−6mol/L. The high selectivity of the sensor toward BPA depends on the synergistic shielding effect by β-CD units and an optimal space-matching between the host and the guest. The proposed sensor was successfully used for the determination of BPA in water samples.
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