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

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

10.9K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
10.9K
Phase I Reactions: Oxidation of Carbon-Heteroatom and Miscellaneous Systems01:15

Phase I Reactions: Oxidation of Carbon-Heteroatom and Miscellaneous Systems

165
Oxidative reactions are pivotal in metabolizing numerous compounds, including pharmaceutical drugs. These reactions often occur in carbon-heteroatom systems, such as carbon-nitrogen, carbon-sulfur, and carbon-oxygen.
In carbon-nitrogen systems, aliphatic and aromatic amines can undergo oxidative reactions. Secondary and tertiary amines, like those found in tricyclic antidepressants, can undergo N-dealkylation, a process that involves the oxidation of the alkyl group. In addition, oxidative...
165
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
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate02:21

Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate

13.2K
Alkenes can be dihydroxylated using potassium permanganate.  The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
13.2K
Cycloaddition Reactions: MO Requirements for Photochemical Activation01:12

Cycloaddition Reactions: MO Requirements for Photochemical Activation

2.2K
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.
2.2K
Oxidative Cleavage of Alkenes: Ozonolysis01:46

Oxidative Cleavage of Alkenes: Ozonolysis

11.2K
In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
11.2K

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

BandGap Modulated Charge Gating of Semiconductor Coatings Stabilizes Zinc Metal Anodes.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same author

A Topotactic Leap: 2D Layers to 3D Large-Pore Zeolite.

Journal of the American Chemical Society·2026
Same author

Mitigating "Electrostrictive" Coupled-Disruption and Crafting Endogenous Solid-Liquid Interface Toward Mixed Phosphate Cathode for Sodium-Ion Batteries.

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

How manure amendment counters no-tillage yield reduction in winter wheat: enhanced nitrogen components and soil enzyme activity.

Frontiers in plant science·2026
Same author

Cross-Media Cycling of Tropospheric Reactive Nitrogen and Its Implications for Sulfur Chemistry.

Environmental science & technology·2026
Same author

Redefining ·CO<sub>3</sub><sup>-</sup> Formation Chemistry: Zundel-like Switches Drive Carbonate-·OH Interfacial Reactivity.

Journal of the American Chemical Society·2026

関連する実験動画

Updated: Sep 19, 2025

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
10:57

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

18.4K

予期せぬ SO2 光酸化 量子サイズの炭素

Peng Zhang1,2, Liang Wang3, Huazhang Guo3

  • 1State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, P. R. China.

Journal of the American Chemical Society
|June 4, 2025
PubMed
まとめ

炭素量子ドット (CQD) は光衰老を経験し,酸素とは無関係に二酸化硫黄 (SO2) と反応する. これは大気中の炭素の光化学と 恒星間物質の起源に関する 新たな洞察を明らかにしています

さらに関連する動画

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry
08:18

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Published on: March 4, 2021

1.8K
Exploring the Radical Nature of a Carbon Surface by Electron Paramagnetic Resonance and a Calibrated Gas Flow
10:34

Exploring the Radical Nature of a Carbon Surface by Electron Paramagnetic Resonance and a Calibrated Gas Flow

Published on: April 24, 2014

10.9K

関連する実験動画

Last Updated: Sep 19, 2025

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
10:57

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

18.4K
Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry
08:18

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Published on: March 4, 2021

1.8K
Exploring the Radical Nature of a Carbon Surface by Electron Paramagnetic Resonance and a Calibrated Gas Flow
10:34

Exploring the Radical Nature of a Carbon Surface by Electron Paramagnetic Resonance and a Calibrated Gas Flow

Published on: April 24, 2014

10.9K

科学分野:

  • 環境化学
  • 材料科学
  • 天体化学

背景:

  • 大気条件下での炭素量子ドット (CQD) の表面光化学はよく理解されていません.
  • 大気中のプロセスにおけるCQDの役割と,二酸化硫黄 (SO2) などの汚染物質との相互作用については,さらなる調査が必要である.

研究 の 目的:

  • 大気条件下でSO2の存在下でのCQDの光反応性を体系的に調査する.
  • CQDの光老化とSO2の相互作用の背後にあるメカニズム,特に酸素への依存を明らかにする.

主な方法:

  • 実験と理論を組み合わせたアプローチが採用された.
  • CQD表面光酸化に関与する主要な反応性中間物質の特定

主要な成果:

  • CQDの光衰老とSO2との相互作用は酸素 (O2) に依存しないことが判明した.
  • 光刺激CQDは,これらの表面反応を誘発するユニークなエネルギー伝達と光触媒プロセスを誘発します.
  • 光生成孔,ヒドロキシルラジカル,硫酸塩ラジカル,炭素中心のラジカルを含む主要な反応性中間物質が特定されました.

結論:

  • この研究は 炎が形成した煙草の 大気中の光化学について 新しい洞察を与えてくれます
  • 合成ナノサイズの炭素材料の光触媒過程の理解を進める.
  • 星間媒体の硫化炭酸コンドライトの起源について,潜在的な説明を提供している.