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Liquid photonic crystal detection reagent for reliable sensing of Cu2+ in water

机译：液体光子晶体检测试剂可靠地检测水中Cu2 +

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摘要

A traditional hydrogel photonic crystal sensor is prepared by multiple steps, including colloidal assembly, polymerization, and recognition group modification, and its measurement repeatability is a challenge due to the inevitable deviations in sensor fabrication and application. In this work, a salicylic acid-containing "SiO2/propylene carbonate" liquid photonic crystal (Sal-LPC), as a new photonic sensing material, was developed to demonstrate reliable measurement of Cu2+ in water. When the Sal-LPC reagent was mixed with the test sample, the Cu2+ promoted the release of H+ from Sal and shrank the photonic crystal lattice, so that the Cu2+ concentration could be determined by the reflection blueshift of liquid PC. The Sal-LPC reagent showed a stronger response to Cu2+ than to other cations, and its sensitivity and measurement range could be optimized by the particle fraction and Sal dosage. Compared to traditional PC hydrogel sensors, the liquid PC reagent was composed of colloidal particles and responsive species, which required no strict control in synthesis. More importantly, the optical response of the liquid PC reagent was scarcely affected by changes in synthesis, storage, or application, and it could interact with the analyte quickly and quantitatively, which ensured accurate and repeatable measurement in either chemical analysis or environmental monitoring.
机译：传统的水凝胶光子晶体传感器由多个步骤制备，包括胶体组件，聚合和识别组修饰，并且其测量可重复性是由于传感器制造和应用中的不可避免的偏差导致的挑战。在这项工作中，开发出一种含水杨酸的“SiO 2 /丙烯碳酸亚碳酸亚碳酸亚丙酯”作为一种新的光子传感材料，以证明水中Cu2 +的可靠测量。当Sal-LPC试剂与试验样品混合时，Cu2 +促进H +的释放H +，并缩小光子晶格，使得Cu2 +浓度可以通过液体PC的反射蓝光确定。 SAL-LPC试剂表现出对Cu2 +的响应而不是其他阳离子，并且其灵敏度和测量范围可以通过粒子分数和溶剂剂量进行优化。与传统的PC水凝胶传感器相比，液体PC试剂由胶体颗粒和响应物种组成，这无需严格控制合成。更重要的是，液体PC试剂的光学响应几乎没有合成，储存或应用的变化影响，并且它可以快速和定量地与分析物相互作用，这确保了化学分析或环境监测中的准确和可重复的测量。

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  • 来源
    《RSC Advances》 |2020年第18期|共8页
  • 作者

    Zhang Yixin; Ge Jianping;

  • 作者单位

    East China Normal Univ Sch Chem &

    Mol Engn Shanghai Key Lab Green Chem &

    Chem Proc Shanghai 200062 Peoples R China;

    East China Normal Univ Sch Chem &

    Mol Engn Shanghai Key Lab Green Chem &

    Chem Proc Shanghai 200062 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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