Optical supermicrosensor responses for simple recognition and sensitive removal of Cu (II) Ion target
Optical supermicrosensor responses for simple recognition and sensitive removal of Cu (II) Ion target
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DOI：
10.1016/j.talanta.2010.11.008
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发表时间：
2011-02-15
期刊：
影响因子：
6.1
通讯作者：
Shahat, Ahmed
中科院分区：
文献类型：
--
作者：
El-Safty, Sherif A.;Ismail, Adel A.;Shahat, Ahmed
光学化学传感器技术领域需要一种简单而通用的设计，用于快速，敏感，选择性，廉价和特定识别各种有毒金属离子。在有序的多孔载体上适当的调节显色受体导致了目标物种的选择性和敏感的化学传感器。在这项研究中，我们提供了关于二维和三维（二维和三维）有序超微孔单体作为固定显色探针的选择性形状和尺寸载体的潜在使用的真实证据。在所有化学传感器中，三维超微孔具有易于接近目标离子的特点，如离子传输和对受体-金属分析物结合事件的高亲和力响应。这导致一个光学彩色信号，很容易产生和转导，即使在痕量水平的Cu（II）目标离子。超微传感器显示出能够产生高达纳摩尔浓度(类似于10（-9)mol/dm(3)）的Cu（II）离子感应响应，响应时间快（以秒为数量级）。超微传感器具有创建易于修改的传感系统的能力，具有多个Cu（II）分析物传感系统的再生/再利用循环。采用ClO4-阴离子作为剥离剂进行简单处理，有效地去除了Cu（II）离子，形成了“无金属”探针表面。尽管存在活性成分物种，但超微传感器已经表现出特异性行为，允许在实际样品（如废水）中进行Cu（II）离子选择性测定。广泛的分析结果表明，使用超微传感器作为Cu（II）离子带进行现场筛选可以成为一种时间和成本上替代当前有效实验室分析的工具。(C) 2010 Elsevier B.V.版权所有
The field of optical chemosensor technology demands a simple yet general design for fast, sensitive, selective, inexpensive, and specific recognition of a broad range of toxic metal ions. The suitable accommodation of chromogenic receptors, onto ordered porous carriers have led to selective and sensitive chemosensors of target species. In this study, we offer real evidence on the potential use of two- and three-dimensional (2D and 3D) ordered supermicroporous monoliths as selective shape and size carriers for immobilizing the chromogenic probe. Among all the chemosensors, 3D supermicropore has exhibited easy accessibility of target ions, such as ion transports and high affinity responses of receptor-metal analyte binding events. This leads to an optical color signal that is easily generated and transduced even at trace levels of Cu(II) target ions. The supermicrosensors have shown the ability to create Cu(II) ion-sensing responses up to nanomolar concentrations (similar to 10(-9) mol/dm(3)) with rapid response time (in the order of seconds). Supermicrosensors have the ability to create easily modified sensing systems with multiple regeneration/reuse cycles of sensing systems of Cu(II) analytes. The simple treatment using ClO4- anion as a stripping agent has removed effectively the Cu(II) ions and formed a "metal-free" probe surface. The super microsensors have exhibited the specificity behavior permitting Cu(II) ion-selective determination in real-life samples, such as in wastewater, despite the presence of active component species. Extensive analytical results indicate that the use of the supermicrosensor as Cu(II) ion strips for field screening can be a time- and cost-alternative tool to current effective laboratory assays. (C) 2010 Elsevier B.V. All rights reserved.