Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Catalysis02:50

Catalysis

23.1K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
23.1K
Catalysis01:27

Catalysis

10
Catalysis influences the rate of chemical reactions by providing an alternative reaction pathway with lower activation energy. A catalyst speeds up a reaction, but it is not consumed during the process. The fundamental principle of catalysis is the ability of a catalyst to alter the reaction mechanism, often introducing a more efficient pathway than the uncatalyzed process.In a catalyzed reaction, the catalyst participates directly in the reaction mechanism. It interacts with reactants to form...
10
Heterogeneous Catalysis01:22

Heterogeneous Catalysis

143
Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
143
Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

1.4K
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
1.4K
Reduction of Alkenes: Catalytic Hydrogenation02:13

Reduction of Alkenes: Catalytic Hydrogenation

12.6K
Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
12.6K
Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation01:28

Reduction of Benzene to Cyclohexane: Catalytic Hydrogenation

5.6K
Unlike the easy catalytic hydrogenation of an alkene double bond, hydrogenation of a benzene double bond under similar reaction conditions does not take place easily. For example, in the reduction of stilbene, the benzene ring remains unaffected while the alkene bond gets reduced. Hydrogenation of an alkene double bond is exothermic and a favorable process. In contrast, to hydrogenate the first unsaturated bond of benzene, an energy input is needed; that is, the process is endothermic. This is...
5.6K

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Challenges and prospects for malaria elimination in the Greater Mekong Subregion.

Acta tropica·2011
Same author

[Optimization of extraction procedure of tongmai granules by orthogonal design with pharmacodynamic index].

Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica·2011
Same author

Determinants of postoperative corneal edema and impact on goldmann intraocular pressure.

Cornea·2011
Same author

Z-palatopharyngoplasty plus genioglossus advancement and hyoid suspension for obstructive sleep apnea hypopnea syndrome.

Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery·2011
Same author

Efficient and selective photodimerization of 2-naphthalenecarbonitrile mediated by cucurbit[8]uril in an aqueous solution.

Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology·2011
Same author

Quality assurance and quality improvement in U.S. clinical molecular genetic laboratories.

Current protocols in human genetics·2011

関連する実験動画

Updated: May 6, 2026

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
10:21

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions

Published on: October 5, 2019

7.5K

可視光触媒によるカスケードクロスカップリング水素進化反応.

Qing-Yuan Meng1, Jian-Ji Zhong, Qiang Liu

  • 1Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences , Beijing 100190, PR China.

Journal of the American Chemical Society
|October 29, 2013
PubMed
まとめ

この研究は,酸化物質なしでC-C結合を形成する新しい反応であるクロスカップリング水素進化 (CCHE) を導入します. 可視光,エオシンY,およびグラフェン支持のRuO2触媒を使用して,クロスカップリング製品と水素ガスを効率的に生成します.

さらに関連する動画

Light-driven Enzymatic Decarboxylation
09:58

Light-driven Enzymatic Decarboxylation

Published on: May 22, 2016

12.4K
[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
09:12

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

Published on: May 21, 2019

8.8K

関連する実験動画

Last Updated: May 6, 2026

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
10:21

Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions

Published on: October 5, 2019

7.5K
Light-driven Enzymatic Decarboxylation
09:58

Light-driven Enzymatic Decarboxylation

Published on: May 22, 2016

12.4K
[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
09:12

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

Published on: May 21, 2019

8.8K

科学分野:

  • 有機化学 オーガニック・ケミストリー
  • グリーン・ケミストリー (Green Chemistry)
  • カタリシス カタリシス カタリシス

背景:

  • 交差脱水素結合反応は,C−H結合からC−C結合を形成する.
  • 既存の方法は,しばしばステキオメトリック酸化剤を必要とし,環境上の懸念を提起しています.

研究 の 目的:

  • 犠牲となる酸化物質を回避する新しいクロスカップリング反応を開発する.
  • 副産物として水素ガスのみを使用してC-C結合形成を達成する.

主な方法:

  • イオシンY (光敏感剤) とグラフェンで支えられたRuO2 (触媒) を組み合わせた光触媒システムを利用しました.
  • 室温で可視光照射を用いた.
  • クロスカップリング水素進化 (CCHE) 反応機構を調査した.

主要な成果:

  • 望ましいクロスカップリング製品の量的な収量を達成した.
  • 副産物として水素 (H2) をのみ生成し,酸化物質のないプロセスを実証した.
  • 反応は穏やかな条件下でも効率的に進行した.

結論:

  • 開発されたCCHE反応は,従来のクロス・デヒドロゲネーティブ・カップリング法に持続可能な代替案を提供している.
  • この光触媒的アプローチは,C-C結合形成のグリーンで効率的な経路を提供します.
  • エオシンYとG-RuO2の組み合わせは,酸化物質のないクロスカップリングに有効です.