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

Radical Reactivity: Overview01:11

Radical Reactivity: Overview

2.4K
Radicals, the highly reactive species, gain stability by undergoing three different reactions. The first reaction involves a radical-radical coupling, in which a radical combines with another radical, forming a spin‐paired molecule. The second reaction is between a radical and a spin‐paired molecule, generating a new radical and a new spin‐paired molecule. The third reaction is radical decomposition in a unimolecular reaction, forming a new radical and a spin‐paired...
2.4K
Radical Formation: Overview01:03

Radical Formation: Overview

2.4K
A bond can be broken either by heterolytic bond cleavage to form ions or homolytic bond cleavage to yield radicals. A fishhook arrow is used to represent the motion of a single electron in homolytic bond cleavage. There are two main sources from which radicals can be formed:
Radicals from spin-paired molecules:
Radicals can be obtained from spin-paired molecules either by homolysis or electron transfer. While two radicals are formed in the former, an electron is added in the...
2.4K
Valence Bond Theory02:42

Valence Bond Theory

10.2K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
10.2K
Radical Formation: Addition00:47

Radical Formation: Addition

2.0K
Radicals can be formed by adding a radical to a spin-paired molecule. This is typically observed with unsaturated species, where the addition of a radical across the π bond leads to the production of a new radical by dissolving the π bond. For example, the addition of a Br radical to an alkene yields a carbon-centered radical.
Similar to charge conservation in chemical reactions, spin conservation is implicit for radical reactions. Accordingly, the product formed must possess an...
2.0K
Colors and Magnetism03:02

Colors and Magnetism

12.9K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
12.9K
Radical Reactivity: Steric Effects01:10

Radical Reactivity: Steric Effects

2.2K
The presence of electron-donating, electron-withdrawing, or conjugating groups adjacent to a radical center, imparts electronic stabilization to the radicals. Examples of such electronically-stabilized radicals are triphenylmethyl, tetramethylpiperidine‐N‐oxide, and 2,2‐diphenyl‐1‐picrylhydrazyl. These radicals are remarkably stable and are known as persistent radicals. Some of the persistent radicals can even be isolated and purified.
Along with electronic...
2.2K

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

Biomimetic all-metal Pd<sub>11</sub> helicene.

Science advances·2026
Same author

Cycloparaphenylene-Derived Porous Organic Cylinders.

Journal of the American Chemical Society·2026
Same author

Atomic-scale mechanism of anisotropic ion migration in 2D Bi<sub>2</sub>O<sub>2</sub>Se nanodevices.

Nature communications·2026
Same author

Ligand-regulated copper nanoclusters: atomic-precision synthesis, structural evolution, and catalytic function in photo- and electrocatalysis.

Chemical Society reviews·2026
Same author

Molecular Boron-Phosphides: From Stable Monomers to Aromaticity-Tunable Smallest Neutral Metallacycles.

Inorganic chemistry·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

関連する実験動画

Updated: Nov 24, 2025

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
10:52

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex

Published on: July 27, 2022

3.1K

制御可能なスピン-スピン相互作用を持つTEMPOラジカル-機能化された超分子調整複合体

Wei-Ling Jiang1, Zhiyong Peng1, Bin Huang1

  • 1Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200062, P. R. China.

Journal of the American Chemical Society
|December 28, 2020
PubMed
まとめ

研究者達は 基質機能化された金属サイクルのスピンを 精密に制御しました 彼らは明確なスピン-スピン相互作用を観察し,金属サイクル3は近接性により最も強く,固体状態で切替可能なゼロフィールド分裂を示した.

さらに関連する動画

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
16:24

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

19.1K
Site Directed Spin Labeling and EPR Spectroscopic Studies of Pentameric Ligand-Gated Ion Channels
11:19

Site Directed Spin Labeling and EPR Spectroscopic Studies of Pentameric Ligand-Gated Ion Channels

Published on: July 4, 2016

10.9K

関連する実験動画

Last Updated: Nov 24, 2025

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
10:52

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex

Published on: July 27, 2022

3.1K
Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
16:24

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

19.1K
Site Directed Spin Labeling and EPR Spectroscopic Studies of Pentameric Ligand-Gated Ion Channels
11:19

Site Directed Spin Labeling and EPR Spectroscopic Studies of Pentameric Ligand-Gated Ion Channels

Published on: July 4, 2016

10.9K

科学分野:

  • 超分子化学
  • ラジカル・ケミストリー
  • 材料科学

背景:

  • 非共振性スピン・スピン相互作用は,超分子基質化学において極めて重要です.
  • 新しいスピン材料の設計には スピンの数,位置,距離を制御することが重要です
  • これらの相互作用を理解することは,高度な機能的材料の開発に役立ちます.

研究 の 目的:

  • TEMPO機能化された金属サイクルとケージでスピン・スピン相互作用を構成し,調査する.
  • 協調制御による自己組み立てにより,スピン環境を正確に制御する.
  • 分子構造と固体状態のパッキングがスピン相互作用に及ぼす影響を調査する.

主な方法:

  • TEMPO機能化されたメタラサイクル (1-4) とメタラケージ (5-6) を合成するための協調制御による自己組み立て.
  • 電子パラマグネティック共振 (EPR) スペクトロスコーピーは,スピン-スピン相互作用を研究する.
  • 分子構造と固体構造を明らかにするX線結晶学.
  • メカニカルな研磨と溶媒の蒸気刺激により,結晶から形無形の変換を誘導する.

主要な成果:

  • 精密に制御されたスピン配列は,金属サイクルとケージで達成されました.
  • メタラサイクル3は,より短いスピンスピン距離のため,溶液中のより強いスピンスピン相互作用を示した.
  • 固体状態では,特に金属サイクル4 (D = 17. 5mT) で,重要なスピン・スピン (二極二極) 相互作用と大規模なゼロフィールド分裂 (ZFS) が観察されました.
  • ZFSの可逆的なスイッチングは,金属サイクル4およびそのアナログ4aで結晶から無形への変換によって達成された.

結論:

  • この研究は,金属超分子組の分子間および分子内スピン・スピン相互作用の正確な制御を示しています.
  • 構造変更と固体包装は,スピン相互作用強度とZFSに大きな影響を与える.
  • ZFSの可逆的なスイッチングは,スイッチ可能な有機スピン材料の開発の道を開きます.