Design of a highly sensitive and selective bulk optode based on fluorescence enhancement of N,N′-bis-(1-hydroxyphenylimine)2,2′-pyridil Schiff base: Monitoring of zinc(II) ion in real samples and DFT calculation
Design of a highly sensitive and selective bulk optode based on fluorescence enhancement of N,N′-bis-(1-hydroxyphenylimine)2,2′-pyridil Schiff base: Monitoring of zinc(II) ion in real samples and DFT calculation
复制标题
DOI：
10.1016/j.snb.2015.09.124
复制
发表时间：
2016-02-01
影响因子：
8.4
通讯作者：
Mohammed, Soha F.
中科院分区：
文献类型：
--
作者：
Aziz, Ayman A. Abdel;Seda, Sabry H.;Mohammed, Soha F.
研制了一种新型的高灵敏度、高选择性的光化学传感器（光极），用于测定Zn ~（2+）。通过将新近合成的离子载体HPP：N，N '-bis-（1-hydroxyphenylimine）2，2'-pyridil、作为阴离子添加剂的四苯硼钠（NaTPB）、作为增塑剂的邻苯二甲酸二丁酯（DBP）掺入聚氯乙烯膜中制备了光学传感器。以2，2 '-吡啶和邻氨基苯酚为原料，通过缩合反应合成了新型离子载体。传感器的响应是基于离子载体HPP在与Zn 2+离子结合时的强荧光发射增强。这可能与HPP的有效Zn 2+结合相关，其促进良好的螯合增强荧光（CHEF）效应并防止光诱导电子转移（PET）效应。研究并优化了几个参数对测定锌离子的影响。在最佳条件下，锌离子浓度与荧光强度呈良好的线性关系，灵敏度在1.0 × 10 ~（-10）~ 1.0 × 10 ~（-2）M范围内，检测限为6.3 × 10 ~（-11）M。该探针对Zn ~（2+）具有很高的选择性，用于真实的食品和生物样品中Zn ~（2+）的测定，结果令人满意。理论计算支持传感器对Zn 2+的传感机制。(C)2015 Elsevier B. V.版权所有。
A novel highly sensitive and selective optical chemical sensor (optode) was fabricated for the determination of Zn2+ ion. The optical sensor was prepared by incorporating recently synthesized ionophore, HPP: N,N'-bis-(1-hydroxyphenylimine)2,2'-pyridil, sodium tetraphenylborate (NaTPB) as an anionic additive, dibutyl phthalate (DBP) as a plasticizer in a poly( vinylchloride) membrane. The novel ionophore was synthesized by conventional condensation reaction between 2,2'-pyridil and 2-aminophenol and characterized using different spectroscopic techniques. The response of the sensor is based on the strong fluorescent emission enhancement of ionophore HPP upon binding to Zn2+ ions. This can be correlated to the efficient Zn2+ binding of HPP which promotes a good chelation-enhanced fluorescence (CHEF) effect and prevents the photoinduced electron transfer (PET) effect. The effect of several parameters in determining Zn2+ were studied and optimized. Under the optimum conditions, a good linear relationship between the fluorescence response and concentration of Zn2+ was achieved with high sensitivity within a wide range from 1.0 x 10(-10) to 1.0 x 10(-2) M and a limit of detection (LOD) 6.3 x 10(-11)M. Furthermore, the present probe exhibited a high selectivity for Zn2+ over other metal ions and was successfully assessed for determination of Zn2+ ions in real samples including some food and biological samples with satisfactory results. Theoretical calculations were employed to support the sensing mechanism of the sensor toward Zn2+. (C) 2015 Elsevier B.V. All rights reserved.