Search research articles

お問い合わせ

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 Journal Methods Collections JoVE Encyclopedia of Experiments アーカイブ

教育

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual 教員リソースセンター教員サイト

プライバシーポリシー

関連する概念動画

Reaction Mechanisms

Reaction Mechanisms

Chemical reactions often occur in a stepwise fashion, involving two or more distinct reactions taking place in a sequence. A balanced equation indicates the reacting species and the product species, but it reveals no details about how the reaction occurs at the molecular level. The reaction mechanism (or reaction path) provides details regarding the precise, step-by-step process by which a reaction occurs.
For instance, the decomposition of ozone appears to follow a mechanism with two steps:

Molecular Spectroscopy: Absorption and Emission

Molecular Spectroscopy: Absorption and Emission

Molecules possess discrete energy levels called quantum states. Unlike atoms, which have simpler energy levels, molecules possess additional rotational and vibrational energy levels. Each energy level is separated by an energy gap, with the gaps between adjacent electronic, vibrational, and rotational levels varying significantly. The three types of energy levels in a diatomic molecule are shown in Figure 1.

UV–Vis Spectroscopy: Molecular Electronic Transitions

UV–Vis Spectroscopy: Molecular Electronic Transitions

In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this process,...

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

Gibson Assembly of Highly Repetitive DNA.

Biochemistry·2026

Same author

The cotranslational cycle of the ribosome-bound Hsp70 homolog Ssb.

Nature communications·2026

Same author

Temperature dependence of crystal melt coexistence for supported polyethylene filaments.

Nature communications·2025

Same author

Single-molecule FRET and tracking of transfected biomolecules in living cells.

Biophysical journal·2025

Same author

TAF2 condensation in nuclear speckles links basal transcription factor TFIID to RNA splicing factors.

Cell reports·2025

Same author

Basolateral amygdala oscillations enable fear learning in a biophysical model.

eLife·2024

Same journal

Erratum for the Research Article "Detecting supramolecular organic nanoparticles during heat wave".

Science (New York, N.Y.)·2026

Same journal

Local signals, systemic decline.

Science (New York, N.Y.)·2026

Same journal

The mechanics of liver regeneration.

Science (New York, N.Y.)·2026

Same journal

Computing in a memory with physics.

Science (New York, N.Y.)·2026

Same journal

Retraction.

Science (New York, N.Y.)·2026

Same journal

Making time.

Science (New York, N.Y.)·2026

関連記事をすべて見る

Search research articles

関連する実験動画

Updated: Jun 27, 2026

Fabrication and Testing of Microfluidic Optomechanical Oscillators

Fabrication and Testing of Microfluidic Optomechanical Oscillators

Published on: May 29, 2014

単一分子オプトメカニカルサイクル

Thorsten Hugel¹, Nolan B Holland, Anna Cattani

¹Lehrstuhl für Angewandte Physik & Center for Nanoscience, Ludwig-Maximilians Universität, Amalienstrasse 54, 80799 München, Germany.

Science (New York, N.Y.)

|May 11, 2002

まとめ

この要約は機械生成です。

研究者らは,合約し,機械的な作業を行う光電動ポリマーを作成しました. この単一分子装置は,光機械的なエネルギー変換を実証し,将来のナノスケールマシンへの道を開く.

さらに関連する動画

Label-free Single Molecule Detection Using Microtoroid Optical Resonators

Label-free Single Molecule Detection Using Microtoroid Optical Resonators

Published on: December 29, 2015

Dissecting Mechanoenzymatic Properties of Processive Myosins with Ultrafast Force-Clamp Spectroscopy

Dissecting Mechanoenzymatic Properties of Processive Myosins with Ultrafast Force-Clamp Spectroscopy

Published on: July 1, 2021

関連する実験動画

Last Updated: Jun 27, 2026

Fabrication and Testing of Microfluidic Optomechanical Oscillators

Fabrication and Testing of Microfluidic Optomechanical Oscillators

Published on: May 29, 2014

Label-free Single Molecule Detection Using Microtoroid Optical Resonators

Label-free Single Molecule Detection Using Microtoroid Optical Resonators

Published on: December 29, 2015

Dissecting Mechanoenzymatic Properties of Processive Myosins with Ultrafast Force-Clamp Spectroscopy

Dissecting Mechanoenzymatic Properties of Processive Myosins with Ultrafast Force-Clamp Spectroscopy

Published on: July 1, 2021

科学分野:

分子機械とは,分子機械のこと.
ナノテクノロジーナノテクノロジー
ポリマーサイエンスの科学

背景:

光を駆動する分子機械は,将来のナノスケールデバイスにとって極めて重要です.
アゾベンゼンポリマーは,光に反応する材料のモデルシステムを提供します.

研究の目的:

光を駆動する分子機械のモデルとして,二相性の光感受性アゾベンゼンのポリマーを合成し,研究する.
単一分子レベルで光力学的エネルギー変換を実証する.

主な方法:

ビスタブルな光敏感アゾベンゼンから成るポリマーを合成した.
単一分子力スペクトロスコーピーを利用しました.
完全内部反射条件下での光学刺激を用いる.

主要な成果:

個々のポリマーは,トランスとシス構成の間のアゾ群を切り替えることで,光学的に延長され,収縮されました.
ポリマーは外力に対する収縮を示し,機械的な作業を行った.
定期的な操作により,単一分子装置における光力学的エネルギー変換が確認されました.

結論:

合成されたアゾベンゼンポリマーは,光で動く分子機械として機能します.
この研究は,単一分子デバイスにおける光機械的エネルギー変換の原理の証明を提供します.
この発見は,将来のナノスケールアプリケーションにおけるこのようなシステムの可能性を裏付けています.