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 Chain-Growth Polymerization: Overview01:10

Radical Chain-Growth Polymerization: Overview

2.7K
Chain-growth or addition polymerization is successive addition reactions of monomers with a polymer chain. In radical chain-growth polymerization, the reaction proceeds via a free-radical intermediate. The free radical is formed from radical initiators, which spontaneously generate free radicals by homolytic fission. Organic peroxides (such as dibenzoyl peroxide, as shown in Figure 1) or azo compounds are popular radical initiators. A low concentration ratio of radical initiator to monomer is...
2.7K
Radical Chain-Growth Polymerization: Mechanism01:09

Radical Chain-Growth Polymerization: Mechanism

2.9K
The radical chain-growth polymerization mechanism consists of three steps: initiation, propagation, and termination of polymerization. The polymerization initiates when a free radical generated from the radical initiator adds to the unsaturated bond in the monomer. The unpaired electron of the free radical and one π electron in the unsaturated bond creates a σ bond between the free radical and the monomer. As a result, the other π electron in the unsaturated bond converts this...
2.9K
Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

1.8K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
1.8K
Anionic Chain-Growth Polymerization: Mechanism01:04

Anionic Chain-Growth Polymerization: Mechanism

1.7K
The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael...
1.7K
Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

2.1K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
2.1K
Amplifying Signals via Second Messengers01:15

Amplifying Signals via Second Messengers

6.1K
Many receptor binding ligands are hydrophilic; they do not cross the cell membrane but bind to cell-surface receptors. Thus, their message must be relayed by second messengers present in the cell cytoplasm. There are several second messenger pathways, each with its own way of relaying information. For example, the G protein-coupled receptors can activate both phosphoinositol and cyclic AMP (cAMP) second messenger pathways. The phosphoinositol pathway is active when the receptor induces...
6.1K

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

One Coordination Cage, Many Pathways: Multiple Stimuli Drive Reversible Transformations.

JACS Au·2026
Same author

Programming Palladium Cage Geometry through Ligand Redox Modulation.

Angewandte Chemie (International ed. in English)·2026
Same author

Transparent Conductive Copper-Doped Zinc Oxide (ZnO:Cu) Thin Films: PVco-D Fabrication and Applications in Perovskite Solar Cells.

Materials (Basel, Switzerland)·2026
Same author

Controlled Nitration of Solvent Green 5 as a Platform for Functional Perylene Derivatives.

Organic letters·2026
Same author

New Chemical Scaffold with Antimicrobial Activity Identified in a Screening of Industrial Photoactive Compounds.

Antibiotics (Basel, Switzerland)·2026
Same author

Functionalization of the 1,8-Naphthalimide Core with Weak Nucleophiles.

Organic letters·2026

関連する実験動画

Updated: May 6, 2026

Light-mediated Formation and Patterning of Hydrogels for Cell Culture Applications
10:45

Light-mediated Formation and Patterning of Hydrogels for Cell Culture Applications

Published on: September 29, 2016

13.6K

Organogelation を通じて自発的な第2ハーモニー生成を促進する

A Belén Marco1, Fátima Aparicio2, Lara Faour2

  • 1Departamento de Química Orgánica, ICMA, Universidad de Zaragoza-CSIC , 50009 Zaragoza, Spain.

Journal of the American Chemical Society
|July 15, 2016
PubMed
まとめ

非線形光学用の新型オルガンゲレータが合成された. 結果的に得られる材料は,前処理なしに安定した自発的な第二ハーモニック生成 (SHG) を示し,SHG材料のアプリケーションを簡素化します.

さらに関連する動画

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
10:17

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

12.1K
Second Harmonic Generation Signals in Rabbit Sclera As a Tool for Evaluation of Therapeutic Tissue Cross-linking TXL for Myopia
12:25

Second Harmonic Generation Signals in Rabbit Sclera As a Tool for Evaluation of Therapeutic Tissue Cross-linking TXL for Myopia

Published on: January 6, 2018

8.3K

関連する実験動画

Last Updated: May 6, 2026

Light-mediated Formation and Patterning of Hydrogels for Cell Culture Applications
10:45

Light-mediated Formation and Patterning of Hydrogels for Cell Culture Applications

Published on: September 29, 2016

13.6K
20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
10:17

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

12.1K
Second Harmonic Generation Signals in Rabbit Sclera As a Tool for Evaluation of Therapeutic Tissue Cross-linking TXL for Myopia
12:25

Second Harmonic Generation Signals in Rabbit Sclera As a Tool for Evaluation of Therapeutic Tissue Cross-linking TXL for Myopia

Published on: January 6, 2018

8.3K

科学分野:

  • 材料科学
  • 化学について
  • 光学について

背景:

  • 非線形光学 (NLO) 材料は光学技術にとって極めて重要です.
  • 効率的なセカンドハーモニックジェネレーション (SHG) を達成するには,しばしば複雑なアラインメント方法が必要です.
  • 本質的に一致するNLO材料の開発は大きな課題です.

研究 の 目的:

  • 散らばった赤色染色体に基づいた 新種の有機ゲレータを合成する
  • 結果となる超分子キセロゲルの自発的なSHG特性を調査する.
  • NLOの材料の準備に簡素化されたアプローチを示します.

主な方法:

  • オルガンゲレータを製造するために3段階の合成手順が採用されました.
  • 超分子ゲル形成が誘発された.
  • ゼロゲルの第2ハーモニック生成 (SHG) 応答を測定した.
  • SHGの反応の安定性は数ヶ月間モニタリングされた.

主要な成果:

  • 合成されたオルガンゲレータは安定したキセロゲルを形成した.
  • これらのゼロゲルは,事前処理なしに自発的な第2ハーモニック生成 (SHG) を示した.
  • 観察されたSHGの活動は数ヶ月間安定した.
  • 分子間相互作用によって誘発される内在的な構造組織は,非中心対称なNLO活性アライメントを促進した.

結論:

  • SHG活性物質を作るためのシンプルで効率的な方法が開発されました.
  • オルガンゲレータは,内在的なNLO材料の設計に有望なプラットフォームを提供します.
  • このアプローチは,複合的な対極配列の外部技術を回避し,従来の方法よりも重要な利点を提供します.