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関連する概念動画

Network Covalent Solids02:18

Network Covalent Solids

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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...
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Carbon Skeletons01:12

Carbon Skeletons

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Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side...
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Molecular Models02:00

Molecular Models

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Physical models representing molecular architectures of chemical compounds play essential roles in understanding chemistry. The use of molecular models makes it easier to visualize the structures and shapes of atoms and molecules.
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Structural Isomerism02:34

Structural Isomerism

20.4K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
20.4K
Metallic Solids02:37

Metallic Solids

19.8K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
19.8K
Valence Bond Theory02:42

Valence Bond Theory

9.9K
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...
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関連する実験動画

Updated: Oct 31, 2025

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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六角連結基の3D共性有機フレームワーク

Liangjun Chen1, Chengtao Gong1, Xiaokang Wang2

  • 1College of Materials Science and Engineering and College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, China.

Journal of the American Chemical Society
|July 1, 2021
PubMed
まとめ

協和有機フレームワーク (COF) のサブステイキオメトリック構造は,新しい2Dおよび3D材料を生成します. これらの部分的に接続されたCOFはガスの吸収を強化し,ユニークな構造特性を示し,多孔材料の研究に新しい道を開きます.

さらに関連する動画

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
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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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関連する実験動画

Last Updated: Oct 31, 2025

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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Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
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Synthesis and Characterization of Functionalized Metal-organic Frameworks
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科学分野:

  • 材料科学
  • 化学について
  • ナノテクノロジー

背景:

  • 協和有機フレームワーク (COF) は,構造と応用において重要な進歩を遂げた結晶性多孔性材料です.
  • 伝統的なCOFの設計は,網状化学によるブロックの完全な接続性に依存しています.
  • COFの新しいアーキテクチャと機能を発見するために,代替建設戦略を探求することが重要です.

研究 の 目的:

  • 2Dと3DのCOFのサブステイキオメトリック構造を,六角リンクと4つ接続されたビルユニットを使用して実証する.
  • 表面積とガス吸収を含むCOF特性に対する部分接続性の影響を調査する.
  • 前例のない構造制御を実現する. 例えば,非相互浸透した3D COF.

主な方法:

  • 六角連結器と4つ接続された建物の間の凝縮反応.
  • 制御フレームワークの接続性に対するサブステキオメトリック合成アプローチ.
  • COFの構造,表面積 (BET) およびガス吸附特性 (C2H2,CO2,CH4) の特徴

主要な成果:

  • 部分的に接続された2Dと3DのCOFの合成が成功しました.
  • これまでに報告された3D COFのBET表面積は最高です.
  • サブステイキオメトリック2DCOFでは,C2H2とCO2の吸収と選択性が向上した.
  • 3D COF の予約されたベンザルデヒドは相互浸透を制御し,相互浸透しない pts トポロジーにつながります.

結論:

  • サブステイキオメトリック・コンストラクションは,カスタマイズされた性質を持つCOFを設計するための新しい戦略を提供します.
  • COFの残留機能群は,強化されたアプリケーションのために利用できます.
  • この研究は,伝統的な網状化学の概念に挑戦し,COFの合成と応用の可能性を広げています.