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

Cycloaddition Reactions: MO Requirements for Photochemical Activation01:12

Cycloaddition Reactions: MO Requirements for Photochemical Activation

2.0K
Some cycloaddition reactions are activated by heat, while others are initiated by light. For example, a [2 + 2] cycloaddition between two ethylene molecules occurs only in the presence of light. It is photochemically allowed but thermally forbidden.
2.0K
Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

1.8K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
1.8K
Vicinal Diols via Reductive Coupling of Aldehydes or Ketones: Pinacol Coupling Overview01:27

Vicinal Diols via Reductive Coupling of Aldehydes or Ketones: Pinacol Coupling Overview

1.7K
Wilhelm Rudolph Fittig discovered the pinacol coupling reaction in 1859. It is a radical dimerization reaction and involves the reductive coupling of aldehydes or ketones in the presence of hydrocarbon solvent to yield vicinal diols.
1.7K
Cycloaddition Reactions: MO Requirements for Thermal Activation01:16

Cycloaddition Reactions: MO Requirements for Thermal Activation

3.5K
Thermal cycloadditions are reactions where the source of activation energy needed to initiate the reaction is provided in the form of heat. A typical example of a thermally-allowed cycloaddition is the Diels–Alder reaction, which is a [4 + 2] cycloaddition. In contrast, a [2 + 2] cycloaddition is thermally forbidden.
3.5K
Aryldiazonium Salts to Azo Dyes: Diazo Coupling01:11

Aryldiazonium Salts to Azo Dyes: Diazo Coupling

2.9K
The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the...
2.9K
Acid-Catalyzed Aldol Addition Reaction01:15

Acid-Catalyzed Aldol Addition Reaction

2.4K
The aldol reaction of a ketone under acidic conditions successfully forms an unsaturated carbonyl as the final product instead of an aldol. The acid-catalyzed aldol reaction is depicted in Figure 1.
2.4K

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

Intensity-modulated radiotherapy alone versus concurrent chemoradiotherapy ± induction chemotherapy in older patients with low-risk stage II or T3N0M0 nasopharyngeal carcinoma.

BMC cancer·2026
Same author

[Action mechanism of paeonol in inhibiting alcoholic liver disease through regulating PERK-eIF2α-ATF4-CHOP signaling pathway mediated by endoplasmic reticulum stress].

Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica·2026
Same author

Controlled assembly of two-dimensional porphyrin heterostructures toward directed energy transfer and charge separation.

Nature communications·2026
Same author

Unraveling N-O Cleavage and N-H Bond Formation for NO Reduction to NH<sub>3</sub> at a Bimetallic Fe-Mo Site.

Journal of the American Chemical Society·2026
Same author

Anion-Directed Assembly of Atomically Precise Silver Nanofibers: Tunable Inner Diameters and Mechanical Exfoliation into Subnanometer Nanofibers.

Journal of the American Chemical Society·2026
Same author

Interfacial interaction in an organic-inorganic heterostructure <i>via</i> W-N bonds for enhanced photocatalytic H<sub>2</sub> production.

Chemical communications (Cambridge, England)·2026

相关实验视频

Updated: May 16, 2025

Chemoselective Modification of Viral Surfaces via Bioorthogonal Click Chemistry
12:31

Chemoselective Modification of Viral Surfaces via Bioorthogonal Click Chemistry

Published on: August 19, 2012

24.1K

量子点接口启用通过在可见光下直接激活化物直接激活交叉合化.

Xiao-Jun He1,2, Zan Liu1,2, Chao Zhou1,2

  • 1Key Laboratory of Photochemical Conversion and Optoelectronic Materials, New Cornerstone Science Laboratory, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.

ACS nano
|April 1, 2025
PubMed
概括
此摘要是机器生成的。

半导体量子点 (QD) 允许直接激活化物C-H键,以实现交叉合的化. 这种新的方法克服了挑战,在温和条件下提供了一种高效和选择性的碳化合物的途径.

关键词:
通过交叉合的化.直接激活阿尔代的作用.接口 接口 接口 接口 接口光催化作用的光催化作用一个量子点,一个量子点.稳定活跃的中间物种的稳定.

更多相关视频

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

9.1K
Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode
10:41

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode

Published on: May 31, 2018

8.7K

相关实验视频

Last Updated: May 16, 2025

Chemoselective Modification of Viral Surfaces via Bioorthogonal Click Chemistry
12:31

Chemoselective Modification of Viral Surfaces via Bioorthogonal Click Chemistry

Published on: August 19, 2012

24.1K
Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

9.1K
Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode
10:41

Enhanced Electron Injection and Exciton Confinement for Pure Blue Quantum-Dot Light-Emitting Diodes by Introducing Partially Oxidized Aluminum Cathode

Published on: May 31, 2018

8.7K

科学领域:

  • 有机化学 有机化学
  • 摄影化学的使用.
  • 材料科学 材料科学 材料科学

背景情况:

  • 直接激活化物C-H键以进行乙化是具有挑战性的,因为它具有强大的C-H键和极端的不稳定性.
  • 现有的方法往往需要苛刻的条件或缺乏选择性.

研究的目的:

  • 开发一种通过直接化物C-H键激活进行交叉合化的新方法.
  • 为了克服与激活甲基C-H键相关的固有挑战.

主要方法:

  • 使用半导体量子点 (QD) 作为催化界面.
  • 采用光化学转化用于直接激活C-H键和激素生成.
  • 促进基结稳定和随后的交叉合反应.

主要成果:

  • 证明了和基的高效和选择性交叉合化.
  • 实现了甲基C-H键的直接激活,转化为乙基基.
  • 通过使用QD接口成功稳定了基中间体.

结论:

  • 半导体量子点为光化学转换提供了有效的接口.
  • 以QD为媒介的方法提供了一种高效和选择性的方法,用于碳基图案的构造.
  • 这一策略使得在极温和的条件下能够实现交叉合化.