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IR and UV–Vis Spectroscopy of Carboxylic Acids01:28

IR and UV–Vis Spectroscopy of Carboxylic Acids

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In IR spectroscopy of carboxylic acids, the C=O bond shows a characteristic band between 1710 and 1760 cm⁻¹, and the O–H bond exhibits a broad band between 2500 and 3300 cm⁻¹.
However, the stretching absorptions for the C=O bond vary depending on the structure of carboxylic acids. The C=O bond of the free carboxylic acids shows a higher stretching frequency, 1760 cm−1, while H-bonded carboxylic acids (dimers) exhibit stretching absorptions at a lower frequency,...
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相关实验视频

Updated: Apr 11, 2026

Qualitative Identification of Carboxylic Acids, Boronic Acids, and Amines Using Cruciform Fluorophores
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铁改性结有机框架作为光传感器用于检测 Askorbic 酸.

Shangqing Zhang1, Jie Wen1, Haiyan Li1

  • 1Department of Chemistry, College of Sciences, Northeastern University, Box 332, Shenyang, 110819, China.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy
|May 9, 2024
PubMed
概括

一种新型的铁改性结有机框架 (Fe-HOF) 能够对酸 (AA) 进行敏感检测. 这种光传感器可以快速量化各种产品中的AA.

关键词:
2,5-二基甲酸二甲酸二甲酸二甲酸亚斯科布酸是一种亚斯科布酸.费-霍夫 (Fe-HOF) 是一个这里是HOF HOF.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 分析化学 分析化学
  • 纳米技术 纳米技术

背景情况:

  • 结合有机框架 (HOF) 是具有可调节性质的新兴多孔材料.
  • 金属离子改造可以增强用于传感应用的HOF的功能.
  • 亚酸 (AA) 是一种重要的营养物质,具有重要的生物和工业相关性,需要精确的检测方法.

研究的目的:

  • 开发一种灵敏,快速的基于光的传感器,用于检测甲酸 (AA).
  • 作为传感平台,使用一种铁改性结有机框架 (Fe-HOF).
  • 为了进行定量分析,研究Fe-HOF对AA的反应机制.

主要方法:

  • 通过将2,5-二基甲酸和Fe3+纳入HOF结构来合成Fe-HOF.
  • 基于Fe3+和AA之间的氧化还原反应的"开启"光策略的开发.
  • 对Fe-HOF材料的表征和对其对AA的传感性能的评估.

主要成果:

  • 成功制备了黄色绿色光Fe-HOF的成功制备.
  • Fe-HOF中的Fe3+有效地灭了光;AA将Fe3+降低到Fe2+,恢复了光.
  • 在0.58μM范围内检测AA的线性光反应,检测极限 (LOD) 为0.14μM.
  • 在维生素C药片,药片和饮料中快速准确地检测到AA,并得到很好的恢复.

结论:

  • 开发的基于Fe-HOF的"启动"光策略为AA检测提供了一种敏感和选择性的方法.
  • 这种传感平台提供了一种快速,可靠和实用的方法,用于在现实世界样本中分析AA.
  • 在分析化学领域,Fe-HOF材料有望开发先进的光传感器.