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

Hydrogen Bonds01:04

Hydrogen Bonds

A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...
Hydrogen Bonds00:26

Hydrogen Bonds

Hydrogen BondsHydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.Hydrogen Bonds Control the World!Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are...
Network Covalent Solids02:18

Network Covalent Solids

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...
Covalent Bonding and Lewis Structures02:46

Covalent Bonding and Lewis Structures

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.
Lewis Structures of Molecular Compounds and Polyatomic Ions02:54

Lewis Structures of Molecular Compounds and Polyatomic Ions

To draw Lewis structures for complicated molecules and molecular ions, it is helpful to follow a step-by-step procedure as outlined:
Aldehydes and Ketones with HCN: Cyanohydrin Formation Overview01:32

Aldehydes and Ketones with HCN: Cyanohydrin Formation Overview

Cyanohydrins are compounds that contain –CN and –OH groups on the same carbon atom. They are formed by the nucleophilic addition of the cyanide ions to the carbonyl group. Cyanide ions are highly basic and nucleophilic and can be generated from HCN under aqueous conditions. However, since HCN is a weak acid, the number of cyanide ions generated is very small. Hence, a small amount of base or KCN/NaCN is added to HCN to increase the concentration of the cyanide ions in the reaction mixture.

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

Electronic and steric control of phase changes caused by methylamine insertion into copper paddlewheel metal-organic frameworks.

Chemical science·2026
Same author

Toward Hydrogen Isotope Separations through Strong Hydrogen Adsorption at Open Copper(I) Sites in an Ultramicroporous Metal-Organic Framework.

Journal of the American Chemical Society·2026
Same author

Single-Crystalline Twelve-Connected Nanographene-Based Covalent Organic Frameworks.

Journal of the American Chemical Society·2026
Same author

SPACESHIP: Autonomous Mapping of Hardware-Dependent Synthesizable Space in Solution-Phase Gold Nanomaterials.

Journal of the American Chemical Society·2026
Same author

An International Laboratory Comparison Study on Approximating the Enthalpy of Adsorption via the Clausius-Clapeyron Approach.

Chemphyschem : a European journal of chemical physics and physical chemistry·2026
Same author

Toward self-driving laboratory 2.0 for chemistry and materials discovery.

Materials horizons·2026

関連する実験動画

Updated: Jul 3, 2026

Microfluidic-based Synthesis of Covalent Organic Frameworks (COFs): A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
08:42

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

Published on: July 10, 2017

特殊な水素貯蔵材料としての共性有機フレームワーク

Sang Soo Han1, Hiroyasu Furukawa, Omar M Yaghi

  • 1Materials and Process Simulation Center (139-74), California Institute of Technology, Pasadena, California 91125, USA.

Journal of the American Chemical Society
|August 8, 2008
PubMed
まとめ

協和有機フレームワーク (COF) は,水素貯蔵に優れた可能性を示しています. 新しいシミュレーションでは,COF-105とCOF-108が,冷凍温度で優れた可逆性H2吸収を提供することを予測しています.

科学分野:

  • マテリアルサイエンス 材料科学
  • コンピューティング・ケミストリー
  • 化学工学化学工学とは

背景:

  • 水素の貯蔵は,クリーンエネルギーアプリケーションにとって非常に重要です.
  • 協和有機フレームワーク (COF) は,ガス貯蔵のための有孔材料として有望である.
  • 効率的な水素吸収のためのCOF構造の最適化は,継続的な研究課題です.

研究 の 目的:

  • 6つの共性有機フレームワーク (COF) の水素 (H2) 吸収特性を調査する.
  • 高重度および高体積のH2貯蔵能力を有するCOF材料を識別する.
  • 計算上の予測を,利用可能な実験データに対して検証する.

主な方法:

  • 最初の原則に基づいたグランドカノンカルモンテカルロ (GCMC) シミュレーションが採用されました.
  • 6つの異なるCOF構造に対して,H2吸附イソテルマを計算した.
  • シミュレーションの結果は,COF-5の実験データと比較されました.

主要な成果:

  • COF-5のシミュレートされたH2吸収は,実験値と密接に一致しました (50バー,77Kで3.3対3.4重量%).
  • COF-105とCOF-108は,例外的な可逆性の過剰なH2吸収 (77Kで10.0重量%) を示した.

さらに関連する動画

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
08:40

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
06:53

Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

関連する実験動画

Last Updated: Jul 3, 2026

Microfluidic-based Synthesis of Covalent Organic Frameworks (COFs): A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
08:42

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

Published on: July 10, 2017

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
08:40

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production

Published on: December 6, 2021

Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
06:53

Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

  • COF-108のH2の総吸収量は18.9%で,COF-102のH2の総吸収量は77Kで最高 (40.4g/L) でした.

    • 結論:

    • COF素材は,実際の水素貯蔵アプリケーションに非常に有望です.
    • COF-105とCOF-108は,効率的なH2貯蔵のための主要な候補である.
    • 計算シミュレーションは,水素貯蔵におけるCOF性能を予測するための信頼できる方法を提供します.