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

Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

2.4K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.4K
Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

1.9K
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
1.9K
The Photochemical Reaction Center01:29

The Photochemical Reaction Center

4.2K
Reaction centers are pigment-protein complexes that initiate energy conversion from photons to chemical entities. Therefore, photochemical reaction center is a more appropriate term that describes these complexes. The Nobel laureates Robert Emerson and William Arnold provided the first experimental evidence of photochemical reaction centers by demonstrating the participation of nearly 2,500 chlorophyll molecules for the release of just one molecule of oxygen. Despite thousands of photosynthetic...
4.2K
Cycloaddition Reactions: MO Requirements for Photochemical Activation01:12

Cycloaddition Reactions: MO Requirements for Photochemical Activation

2.1K
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.
2.1K
Photosystem II01:22

Photosystem II

71.4K
The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
The pigment molecules are arranged across  two photosystem domains — the antenna complex and the reaction center. The main aim of the pigment...
71.4K
Photoluminescence: Applications01:14

Photoluminescence: Applications

441
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
441

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

The Mutually Inspiring Biological and Chemical Synthesis of Fungal Bicyclo[2.2.2]diazaoctane Indole Alkaloids.

Chemical reviews·2025
Same author

Computer-Aided Synthesis Planning (CASP) and Machine Learning: Optimizing Chemical Reaction Conditions.

Chemistry (Weinheim an der Bergstrasse, Germany)·2024
Same author

An exploratory Q-matrix estimation method based on sparse non-negative matrix factorization.

Behavior research methods·2024
Same author

Data-driven Q-matrix learning based on Boolean matrix factorization in cognitive diagnostic assessment.

The British journal of mathematical and statistical psychology·2022
Same author

A Law of Comparative Preference: Distinctions Between Models of Personal Preference and Impersonal Judgment in Pair Comparison Designs.

Applied psychological measurement·2019
Same author

DNA origami-based shape IDs for single-molecule nanomechanical genotyping.

Nature communications·2017
Same journal

Electrochemical Dearomative <i>ipso</i>-Cyclization of Indolyl-ynones: A Direct Access to Trifluoromethyl/Selenyl-Spirooxindoles.

Organic letters·2026
Same journal

Photoinduced Radical Epoxidation of <i>N</i>-Alkoxyphthalimides with Allylic Peroxides.

Organic letters·2026
Same journal

B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-Catalyzed Ring-Opening Reaction of Bicyclo[1.1.0]butanes with Silyl Ketene Imines.

Organic letters·2026
Same journal

<i>N</i>-Sulfonylaminophthalimide-Catalyzed Aerobic Oxidative Cleavage of α-C(sp<sup>3</sup>)-H and β,γ-C(sp<sup>3</sup>)-C(sp<sup>3</sup>) Bonds of Tertiary Amines.

Organic letters·2026
Same journal

<i>O</i>-Alkylisourea-Enabled Nickel/Photoredox-Catalyzed Giese Reaction.

Organic letters·2026
Same journal

Direct Assembly of Angular 5-5-5 Tricyclic Skeletons via a Rh(III)-Catalyzed C-H Activation/Annulation Cascade.

Organic letters·2026
查看所有相关文章

相关实验视频

Updated: Jul 27, 2025

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F&#8722;
06:53

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

Published on: July 27, 2018

8.7K

光诱导的FeClCl

Mingjing Deng1, Ke Liu1, Saiya Yuan1

  • 1State Key Laboratory of Microbial Technology, Institute of Microbial Technology, Shandong University, No. 72 Binhai Avenue, Qingdao, 266237, P. R. China.

Organic letters
|June 8, 2023
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种新的方法,用于直接化芳香硫基化物,使用室温的铁催化和光. 这种高效的工艺从易于获得的原料中产生各种芳香化物.

更多相关视频

Design, Synthesis, and Photochemical Properties of Clickable Caged Compounds
09:44

Design, Synthesis, and Photochemical Properties of Clickable Caged Compounds

Published on: October 15, 2019

12.3K
Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch
09:33

Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch

Published on: February 7, 2022

3.5K

相关实验视频

Last Updated: Jul 27, 2025

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F&#8722;
06:53

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

Published on: July 27, 2018

8.7K
Design, Synthesis, and Photochemical Properties of Clickable Caged Compounds
09:44

Design, Synthesis, and Photochemical Properties of Clickable Caged Compounds

Published on: October 15, 2019

12.3K
Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch
09:33

Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch

Published on: February 7, 2022

3.5K

科学领域:

  • 有机化学 有机化学
  • 摄影化学的使用.
  • 催化剂是一种催化剂.

背景情况:

  • 芳香硫烯化物是有机合成中的重要中间体.
  • 直接化方法通常需要恶劣的条件或特殊的试剂.
  • 开发温和高效的化方案具有显著的兴趣.

研究的目的:

  • 开发一种新的光诱导铁催化直接化芳香硫基化物.
  • 为了在室温下使用可见光实现这种转换.
  • 为合成芳香化物提供一种多功能方法.

主要方法:

  • 使用铁化物 (FeCl3) 作为催化剂.
  • 使用可见光辐射 (400-410nm).
  • 在开发条件下对各种替代芳香硫烯化物进行反应.

主要成果:

  • 成功的光诱导铁催化直接化芳香硫基化物得到了实现.
  • 在室温下,反应有效地进行.
  • 获得了相应的芳香化物中等到良好的产量.
  • 该方法证明可以适用于一系列替代的芳香硫基化物.

结论:

  • 已经建立了一个新的,温和和高效的协议,用于直接化芳香硫基化物.
  • 光诱导铁催化方法为芳香化物提供了有价值的合成途径.
  • 这种方法利用了易于获得的原材料和常见的实验室条件.