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関連する概念動画

Network Covalent Solids02:18

Network Covalent Solids

16.1K
Network covalent solids contain a three-dimensional network of covalently bonded atoms as found in the crystal structures of nonmetals like diamond, graphite, silicon, and some covalent compounds, such as silicon dioxide (sand) and silicon carbide (carborundum, the abrasive on sandpaper). Many minerals have networks of covalent bonds.
To break or to melt a covalent network solid, covalent bonds must be broken. Because covalent bonds are relatively strong, covalent network solids are typically...
16.1K
Covalent Bonds01:29

Covalent Bonds

160.3K
Overview
160.3K
Covalent Bonds01:08

Covalent Bonds

10.0K
Overview
When two atoms share electrons to complete their valence shells, they create a covalent bond. An atom's electronegativity—the force with which shared electrons are pulled towards an atom—determines how the electrons are shared. Molecules formed with covalent bonds can be either polar or nonpolar. Atoms with similar electronegativities form nonpolar covalent bonds; the electrons are shared equally. Atoms with different electronegativities share electrons unequally,...
10.0K
Covalently Linked Protein Regulators02:04

Covalently Linked Protein Regulators

8.7K
Proteins can undergo many types of post-translational modifications, often in response to changes in their environment. These modifications play an important role in the function and stability of these proteins. Covalently linked molecules include functional groups, such as methyl, acetyl, and phosphate groups, and also small proteins, such as ubiquitin. There are around 200 different types of covalent regulators that have been identified.
These groups modify specific amino acids in a protein....
8.7K
Covalent Bonding and Lewis Structures02:46

Covalent Bonding and Lewis Structures

60.7K
Compared to ionic bonds, which results from the transfer of electrons between metallic and nonmetallic atoms, covalent bonds result from the mutual attraction of atoms for a “shared” pair of electrons.
60.7K
What is a Mode?01:07

What is a Mode?

25.1K
The mode is one of the commonly used measures of a central tendency. It is defined as the most frequent value in a data set.
There can be more than one mode in a data set if multiple values have the same highest frequency. For instance, suppose that the Statistics exam scores of 20 students are: 50; 53; 59; 59; 63; 63; 72; 72; 72; 72; 72; 76; 78; 81; 83; 84; 84; 84; 90; 93. Here, the mode is 72, as it occurs most frequently, five times.
A data set with two modes is called bimodal. For example,...
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Updated: Jan 22, 2026

Dual-mode Imaging of Cutaneous Tissue Oxygenation and Vascular Function
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Dual-mode Imaging of Cutaneous Tissue Oxygenation and Vascular Function

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バイモード機能を持つモーター統合型3次元共性有機フレームワーク

Junxia Ren1, Yujie Wang2,3, Jinquan Suo1

  • 1State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, P. R. China.

Journal of the American Chemical Society
|January 20, 2026
PubMed
まとめ
この要約は機械生成です。

研究者は分子モーターを共性有機フレームワーク (COF) に組み込むことで新しい材料を作成しました. この技術革新により 光を制御した二酸化炭素の吸収と 薬物の投与が可能になり 分子運動とマクロスコープの機能との橋渡しができています

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Synthesis and Characterization of Functionalized Metal-organic Frameworks
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Synthesis and Characterization of Functionalized Metal-organic Frameworks

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Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
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Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

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関連する実験動画

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Dual-mode Imaging of Cutaneous Tissue Oxygenation and Vascular Function
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Dual-mode Imaging of Cutaneous Tissue Oxygenation and Vascular Function

Published on: December 8, 2010

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Synthesis and Characterization of Functionalized Metal-organic Frameworks
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Synthesis and Characterization of Functionalized Metal-organic Frameworks

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Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
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Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

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科学分野:

  • 材料科学
  • 超分子化学
  • ナノテクノロジー

背景:

  • 生物学的システムは,マクロスコーピカルな機能のために,分子機械を利用します.
  • 合成複製には 分子モーターを ダイナミックで秩序あるフレームワークに統合する必要があります

研究 の 目的:

  • 過剰に混雑したアルケンの回転モーターを3D共性有機フレームワーク (COF) に組み込むための網状設計戦略を開発する.
  • 協調した分子運動とマクロの機能性を示す原型材料 (JUC-666) を作成する.

主な方法:

  • 過剰に混雑したアルケンの回転モーターを組み込んだ3D共性有機フレームワーク (COF) の網状合成
  • 溶液と固体状態での単方向のモーター回転を確認するためのスペクトロスクープと運動分析.
  • CO2吸収の調節と光制御された薬物の放出機能の評価

主要な成果:

  • 3D COF (JUC-666) に回転モーターを成功裏に組み込みました.
  • 光と暗さのサイクルによる可逆的なCO2吸収調節 (K273での83%の容量変化) が実証されている.
  • 精密に制御された薬剤の放出が,光量に比例する動力学 (累積放出の50倍増加) を達成した.

結論:

  • 協和有機フレームワーク (COF) は,分子スケールの運動をマクロスケープの反応に効果的に結びつけることができます.
  • JUC-666は,ダブルモードの機能を持つ適応的機能材料の設計のためのプラットフォームとして機能します.
  • このアプローチにより 光のような外部の刺激に反応する 材料を開発できます