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

Basicity of Heterocyclic Aromatic Amines01:25

Basicity of Heterocyclic Aromatic Amines

5.5K
Heterocyclic amines, where the N atom is a part of an alicyclic system, are similar in basicity to alkylamines. Interestingly, the heterocyclic amine having a nitrogen atom as part of an aromatic ring has much less basicity than its corresponding alicyclic counterpart. For this reason, as presented in Figure 1, piperidine (pKb = 2.8) is significantly more basic than pyridine (pKb = 8.8).
5.5K
Preparation of 1° Amines: Gabriel Synthesis01:28

Preparation of 1° Amines: Gabriel Synthesis

3.4K
Direct alkylation is not a suitable method for synthesizing amines because it produces polyalkylated products. Gabriel synthesis is the most preferred method to exclusively make primary amines. The method uses phthalimide, which contains a protected form of nitrogen that participates in alkylation only once to predominantly give primary amines.
Strong bases like NaOH or KOH deprotonate the phthalimide to form the corresponding anion, which acts as a nucleophile. Further, the anion attacks an...
3.4K
Preparation of 1° Amines: Azide Synthesis01:22

Preparation of 1° Amines: Azide Synthesis

3.8K
Direct alkylation of ammonia produces polyalkylated amines, along with a quaternary ammonium salt. To exclusively prepare primary amines, the azide synthesis method can be used.
Azide ions act as good nucleophiles and react with unhindered alkyl halides to form alkyl azides. Alkyl azides do not participate in further nucleophilic substitution reactions, thereby eliminating the chances of polyalkylated products. Alkyl azides are reduced by hydride-based reducing agents, like lithium aluminum...
3.8K
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism01:37

1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism

3.7K
Nitrous acid is a relatively weak and unstable acid prepared in situ by the reaction of sodium nitrite and cold, dilute hydrochloric acid. In an acidic solution, the nitrous acid undergoes protonation when it loses water to form a nitrosonium ion—an electrophile. Nitrous acid reacts with primary amines to give diazonium salts. The reaction is called diazotization of primary amines.
3.7K
Structure of Amines01:19

Structure of Amines

2.4K
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’...
2.4K
Diazonium Group Substitution: –OH and –H01:19

Diazonium Group Substitution: –OH and –H

2.7K
Nitrous acid, a weak acid, is prepared in situ via the reaction of sodium nitrite with a strong acid under cold conditions. This nitrous acid prepared in situ reacts with primary arylamines to form arenediazonium salts. Such reactions are known as diazotization reactions. As shown in Figure 1, the formation of arenediazonium salts begins with the decomposition of nitrous acid in an acidic solution to give nitrosonium ions.
2.7K

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

Methane storage using metal-dipyrazolate frameworks.

Nature materials·2026
Same author

Mitigating the Viscosity-Concentration Trade-Off in Imidazolium-Functionalized Viologens for Aqueous Organic Redox Flow Batteries.

Journal of the American Chemical Society·2026
Same author

Compartmentalized Porosity in a Hydrogen-Bonded Organic Framework Enables High-Capacity C<sub>3</sub>H<sub>6</sub>/C<sub>2</sub>H<sub>4</sub> Separation.

Advanced materials (Deerfield Beach, Fla.)·2026
Same author

Hydrolytically Stable Zinc-triazole-dicarboxylates for Atmospheric Water Harvesting Formed by <i>In Situ</i> Isomerization of Itaconic Acid.

Inorganic chemistry·2026
Same author

Simultaneous Boost of SF<sub>6</sub> Adsorption Capacity and Kinetics Through Isoreticular Functionalization of Zinc(II)-Pyrazolate Frameworks.

Angewandte Chemie (International ed. in English)·2026
Same author

A Redox-Active Mesoporous Cobalt-Pyrazolate Framework for Reversible O<sub>2</sub> Sorption.

Angewandte Chemie (International ed. in English)·2025

相关实验视频

Updated: May 23, 2025

Preparation of Hydrophobic Metal-Organic Frameworks via Plasma Enhanced Chemical Vapor Deposition of Perfluoroalkanes for the Removal of Ammonia
12:05

Preparation of Hydrophobic Metal-Organic Frameworks via Plasma Enhanced Chemical Vapor Deposition of Perfluoroalkanes for the Removal of Ammonia

Published on: October 10, 2013

15.4K

在Cu(II) -Pyrazolate框架中的氨化,以有效捕获痕迹.

Guang-Rui Si1,2, Xiang-Jing Kong2,3, Tao He1,2

  • 1State Key Laboratory of Materials Low-Carbon Recycling, Beijing University of Technology, Beijing, 100124, China.

Angewandte Chemie (International ed. in English)
|May 15, 2025
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种新的水化途径,用于捕获氨 (NH3) 排放. 这种方法利用一种独特的框架可逆结合氨,为环境修复提供一种节能解决方案.

关键词:
氨气 氨气 氨气 是一种能源效率高的能源效率高的能源效率.金属有机框架的框架.分离 分离 分离 分离.捕捉痕迹 捕获痕迹 捕获痕迹

更多相关视频

Author Spotlight: Accelerating Discovery in Microporous Material Chemistry
07:20

Author Spotlight: Accelerating Discovery in Microporous Material Chemistry

Published on: October 6, 2023

3.5K
Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange
04:51

Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange

Published on: June 23, 2023

2.7K

相关实验视频

Last Updated: May 23, 2025

Preparation of Hydrophobic Metal-Organic Frameworks via Plasma Enhanced Chemical Vapor Deposition of Perfluoroalkanes for the Removal of Ammonia
12:05

Preparation of Hydrophobic Metal-Organic Frameworks via Plasma Enhanced Chemical Vapor Deposition of Perfluoroalkanes for the Removal of Ammonia

Published on: October 10, 2013

15.4K
Author Spotlight: Accelerating Discovery in Microporous Material Chemistry
07:20

Author Spotlight: Accelerating Discovery in Microporous Material Chemistry

Published on: October 6, 2023

3.5K
Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange
04:51

Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange

Published on: June 23, 2023

2.7K

科学领域:

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

背景情况:

  • 工业和农业来源的氨 (NH3) 排放造成了严重的环境和健康问题.
  • 目前使用化学吸收或物理吸收捕获氨的方法面临着不可逆转的结合,高再生能量和材料降解等挑战.

研究的目的:

  • 引入和研究一种用于捕获微量氨的新型水化途径.
  • 为了证明Cu ((II) -pyrazolate框架,BUT-64 ((H2O) 的有效性,用于氨吸附和再生.

主要方法:

  • 使用一个Cu (II) -pyrazolate框架 (BUT-64 (H2O)) 以桥梁水分子作为布伦斯特酸位点.
  • 在不同局部压力和湿度下研究了氨的吸附能力.
  • 评估了材料的再生效率和性稳定性.

主要成果:

  • 在0.1kPa时达到0.27gcm-3的高氨封装密度.
  • 在80%的相对湿度下,对1000ppmNH3的氨吸附能力为1.51mmolg-1的显著氨吸附能力.
  • 液化机制显示可逆结合,易于再生,并减少了水分的共同吸附.

结论:

  • 在BUT-64 (H2O) 中的水化路径为微量氨捕获提供了一个有希望的,节能的解决方案.
  • 该材料具有出色的性稳定性,提高了其适用性.
  • 这种方法克服了与传统氨吸附剂相关的权衡.