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一个NIR比度探针用于检测水性介质中的低化物和二硫酸盐/二硫酸盐

Akshay Kodiyawala¹, Subrata Dutta¹

¹Department of Chemistry, Sardar Vallabhbhai National Institute of Technology, Surat 395007 Gujarat, India.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

|April 16, 2025

概括

一个新的近红外光探测器 (AHS) 以高灵敏度和选择性检测硫酸盐 (HSO3-/SO32-) 和低酸盐 (OCl-). 这个探测器显示了环境和生物分析的潜力,因为它具有水溶性和抗干扰能力.

科学领域:

分析化学分析化学
化学传感器化学传感器
光探测器光探测器

背景情况:

选择性和敏感的光探针的开发对于检测复杂矩阵中的反应性物种至关重要.
近红外 (NIR) 探测器在生物和环境应用中具有优势,因为它减少了背景干扰和更深的组织透.
使用单个探测平台同时检测多种分析物仍然是一个重大挑战.

研究的目的:

设计和合成一种基于半氨酸的新型光探针 (AHS),用于同时检测硫酸盐 (HSO3-/SO32-) 和低酸盐 (OCl-).
在各种样本中调查AHS探头的传感机制,选择性,灵敏度和实际适用性.

主要方法:

一个基于半氨酸的光探针 (AHS) 的合成,其特征是结合的-C=C-键和-SMe组.
光谱分析 (光和UV-Vis) 以表征探针行为并分析相互作用.
研究导致光变化的反应机制 (硫酸盐的迈克尔添加,酸盐的氧化).
评估探头性能,包括选择性,灵敏度,检测极限,pH稳定性和抗干扰能力.
探头用于现实世界样本分析 (纸条,水样).

主要成果:

通过分子内电荷转移 (ICT) 机制,AHS探测器在666nm (λex = 520nm) 呈现NIR光.
与硫酸盐的反应导致光转移到488nm (λex = 420nm),这是由于迈克尔的添加和π-结合的破坏.
与低化物反应导致光转移到580nm (λex = 520nm) 通过-SMe组的氧化.
探测器对两种分析物具有很高的选择性和灵敏性,硫酸盐的检测极限为1.96nM,酸盐的检测极限为164.67nM.
AHS显示出优异的水溶性,抗干扰能力,并在pH值7-10时有效运行.
在检测硫酸盐和低酸盐在纸条和高回收率的真实水样中的成功应用.

结论:

开发的AHS探头是用于近红外区域中硫酸盐和低酸盐的比度和色度检测的高效工具.
在与每个分析物反应时,显著的光变化允许选择性和敏感的同时检测.
探测器的有利性质,包括水溶性和稳定性,使其适用于环境监测和生物分析的实际应用.

关键词:

分析方法分析方法乙硫化二硫化的使用方法双传感器双传感器光光谱学是一种光谱学.低化物是什么? 低化物是什么?NIR光探测器的光探测器

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