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関連する概念動画

Metallic Solids02:37

Metallic Solids

18.3K
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....
18.3K
Ionic Crystal Structures02:42

Ionic Crystal Structures

14.2K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
14.2K
Valence Bond Theory02:42

Valence Bond Theory

8.5K
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...
8.5K
Structural Isomerism02:34

Structural Isomerism

19.2K
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...
19.2K
Structures of Solids02:22

Structures of Solids

14.1K
Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
14.1K
Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

9.6K
The structure of a crystalline solid, whether a metal or not, is best described by considering its simplest repeating unit, which is referred to as its unit cell. The unit cell consists of lattice points that represent the locations of atoms or ions. The entire structure then consists of this unit cell repeating in three dimensions. The three different types of unit cells present in the cubic lattice are illustrated in Figure 1.
Types of Unit Cells
Imagine taking a large number of identical...
9.6K

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Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks
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Synthesis of Single-Crystalline Core-Shell Metal-Organic Frameworks

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2.5K

補完的な多面体金属有機フレームワーク粒子を二重秩序の超構造に組み込む

Lingxin Meng1, Javier Fonseca1, Roberto Sánchez-Naya1,2

  • 1Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, and Barcelona Institute of Science and Technology Campus UAB, 08193 Bellaterra, Barcelona, Spain.

Journal of the American Chemical Society
|July 26, 2024
PubMed
まとめ
この要約は機械生成です。

研究者は2種類の金属有機フレームワーク (MOF) 粒子を用いて3Dの多孔構造を作りました. この自己組み立て法ではポリシュタインで 2次元構造も形成され 複雑な素材の設計が可能になりました

さらに関連する動画

Author Spotlight: Exploring Self-Assembled MOF-Polymer Composites
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Author Spotlight: Exploring Self-Assembled MOF-Polymer Composites

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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

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Author Spotlight: Exploring Self-Assembled MOF-Polymer Composites
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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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科学分野:

  • 材料科学
  • ナノテクノロジー
  • 超分子化学

背景:

  • メタル・オーガニック・フレームワーク (MOF) は,調節性特性を有する多用性のある多孔性材料です.
  • MOFの階層的な構造は,高度なアプリケーションに不可欠です.
  • コロイド式自己組み立ては 複雑なアーキテクチャの作成に 下から上へのアプローチを提供します

研究 の 目的:

  • 3D NaCl型の二次孔性の上部構造の形成を報告する.
  • 2つの異なるコロイドの多面形のMOF粒子の共組を証明する.
  • バイナリ・スーパーストラクチャの作成のためのポリマー減弱型クーロンビック自己組み立てアプローチの使用を調査する.

主な方法:

  • 補完的な特性を持つ2つのコロイドの多面体金属有機フレーム (MOF) 粒子の合体.
  • ポリマーで減弱されたクーロンビック自己組み立て戦略を使用しています.
  • 球状のポリスティレン粒子を組み込み 2次元二重構造を形成する.

主要な成果:

  • 3D NaCl型バイナリ多孔構造の形成に成功した.
  • MOF粒子とポリスティレン球を2Dの上部構造に組み立てることが実証された.
  • 多様な粒子から複雑な超構造を作り出す方法を確立した.

結論:

  • 互いを補完するMOF粒子の共同組み立てにより,洗練された3Dの上部構造が形成されます.
  • 採用された自己組み立てアプローチは汎用性があり,2Dと3Dの両方のバイナリ構造を作成することができます.
  • この研究は,MOFを用いて,適正な多孔性と組成を備えた先進的な材料を設計するための道を開きます.