Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Aldehydes and Ketones with Amines: Imine Formation Mechanism01:23

Aldehydes and Ketones with Amines: Imine Formation Mechanism

5.5K
Imine formation involves the addition of carbonyl compounds to a primary amine. It begins with the generation of carbinolamine through a series of steps involving an initial nucleophilic attack and then several proton transfer reactions. The second part includes the elimination of water, as a leaving group, to give the imine.
Imines are formed under mildly acidic conditions. A pH of 4.5 is ideal for the reaction.
If the pH is low or the solution is too acidic, the reaction slows down in the...
5.5K
Mass Spectrometry of Amines01:19

Mass Spectrometry of Amines

4.2K
In mass spectroscopy, amines undergo fragmentation to give parent ions with odd molecule weights. This observed mass spectrum follows the nitrogen rule: a molecule with an odd number of nitrogen atoms produces a parent ion with an odd molecular weight. The remaining fragments have an even mass.
Amines undergo fragmentation through α cleavage, producing nitrogen-containing cations—iminium ions—and alkyl radicals. Mass spectra of aromatic and cyclic aliphatic amines exhibit...
4.2K
Structure of Amines01:19

Structure of Amines

2.5K
The hybridized nitrogen atom in amines possesses a lone pair of electrons and is bound to three substituents with a bond angle of around 108°, which is less than the tetrahedral angle of 109.5°. However, the C–N–H bond angle is slightly larger at 112°, with a carbon–nitrogen bond length of 147 pm. This carbon–nitrogen bond length of of amines is longer than the carbon–oxygen bond of alcohols (143 pm) but shorter than alkanes’...
2.5K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Environmentally Friendly Pressure-Resistant Superhydrophobic Fabrics and Application in Soil Alkali Return Prevention.

Langmuir : the ACS journal of surfaces and colloids·2026
Same author

Polymerization Time-Optimized Covalent Organic Framework for Ultrasensitive Ethylene Glycol Sensing.

ACS sensors·2026
Same author

A Wearable Acetone Gas Sensor Enabled by Quantum Dot-Sensitized Flower-like Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> for Metabolic Monitoring.

ACS sensors·2025
Same author

Synergistic Gas Sensing and Superhydrophobic Composites Enabled Real-Time Detection of Milk Spoilage.

ACS sensors·2025
Same author

High-Performance Ethylene Glycol Room-Temperature Gas Sensor Based on Biomass-Derived Na-Doped Porous Carbon Microtubules.

Nanomaterials (Basel, Switzerland)·2025
Same author

Highly Transparent Superhydrophobic Coatings for Prevention of Raindrop Adhesion on Rearview Mirrors.

Langmuir : the ACS journal of surfaces and colloids·2025

相关实验视频

Updated: Jun 25, 2025

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
09:37

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry

Published on: October 18, 2019

9.6K

高性能三甲基胺传感器 基于一个二甲基共价有机框架

Weiyu Zhang1,2,3, Qihua Sun1,2, Yuqing Zhu2

  • 1School of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830046, China.

ACS sensors
|May 29, 2024
PubMed
概括

研究人员使用共价有机框架 (COF) 开发了一种新的三甲基胺 (TMA) 传感器,该传感器在室温下有效运行. 这种新型的TB-COF传感器为实时TMA监控提供了高灵敏度和低检测极限.

关键词:
这就是COFs.气体传感传感器是指气体传感器.实时监控实时监控在室温室温.三甲基胺胺的三甲基胺.

更多相关视频

Author Spotlight: Characterizing Porous Materials for Aiding the Development of Robust Metal-Organic Frameworks with Adsorption Behavior
06:45

Author Spotlight: Characterizing Porous Materials for Aiding the Development of Robust Metal-Organic Frameworks with Adsorption Behavior

Published on: March 8, 2024

7.3K
Author Spotlight: An Improved Technique for Trimethylamine Detection in Animal-Derived Medicine by Headspace Gas Chromatography-Tandem Quadrupole Mass Spectrometry
04:19

Author Spotlight: An Improved Technique for Trimethylamine Detection in Animal-Derived Medicine by Headspace Gas Chromatography-Tandem Quadrupole Mass Spectrometry

Published on: March 10, 2023

1.7K

相关实验视频

Last Updated: Jun 25, 2025

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry
09:37

Imine Metathesis by Silica-Supported Catalysts Using the Methodology of Surface Organometallic Chemistry

Published on: October 18, 2019

9.6K
Author Spotlight: Characterizing Porous Materials for Aiding the Development of Robust Metal-Organic Frameworks with Adsorption Behavior
06:45

Author Spotlight: Characterizing Porous Materials for Aiding the Development of Robust Metal-Organic Frameworks with Adsorption Behavior

Published on: March 8, 2024

7.3K
Author Spotlight: An Improved Technique for Trimethylamine Detection in Animal-Derived Medicine by Headspace Gas Chromatography-Tandem Quadrupole Mass Spectrometry
04:19

Author Spotlight: An Improved Technique for Trimethylamine Detection in Animal-Derived Medicine by Headspace Gas Chromatography-Tandem Quadrupole Mass Spectrometry

Published on: March 10, 2023

1.7K

科学领域:

  • 材料科学 材料科学 材料科学
  • 化学工程是化学工程的重要组成部分.
  • 环境科学 环境科学

背景情况:

  • 三甲基胺 (TMA) 在农业和工业中普遍存在,通过吸入会对健康构成重大风险.
  • 现有的TMA气体传感器通常需要高温,这限制了实际应用和市场可行性.
  • 需要灵敏的室温传感器来实时检测TMA.

研究的目的:

  • 为了合成和描述用于气体传感应用的微型共价有机框架 (TB-COF).
  • 开发和评估基于TB-COF的室温气体传感器,用于TMA检测.
  • 为了评估TB-COF传感器的灵敏度,选择性和性能极限.

主要方法:

  • 在室温下使用1,3,5-tris(4-aminophenyl) (TAPB) 和1,3,5-benzotricarboxaldehyde (BTCA) 与酸催化剂合成TB-COF.
  • 制造了三个气体传感器:TA,BT和TB-COF.
  • 在室温下对15种不同的气体进行传感器性能测试,重点关注TMA灵敏度和响应时间.

主要成果:

  • 与TA和BT传感器相比,TB-COF传感器对TMA (6845.9%在500ppm) 的灵敏度明显更高.
  • 通过快速吸附/脱附周期 (23秒) 达到TMA的28.6ppb的低检测极限.
  • 证明TB-COF的性能优于TMA传感的单个组件.

结论:

  • 室温合成的TB-COF是一种有前途的材料,用于敏感和实时的TMA气体传感.
  • 开发的传感器解决了高温检测方法的局限性.
  • 共价有机框架 (COFs) 显示了先进气体传感器开发的巨大潜力.