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関連する概念動画

Ionic Crystal Structures02:42

Ionic Crystal Structures

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...
Ionic Association01:28

Ionic Association

The ionic association is the association of oppositely charged ions in an electrolyte solution to form ion pairs. Bjerrum defined ion pairs as two oppositely charged ions whose electrostatic attraction exceeds the thermal energy of the system, typically expressed as 2kT. Electrostatic attraction depends on ionic charge, separation distance, and the dielectric constant of the medium. Thermal energy, represented by kT, reflects the tendency of ions to move independently due to molecular motion.
Imperfections in Crystal Structure: Stoichiometric Point Defects01:26

Imperfections in Crystal Structure: Stoichiometric Point Defects

Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
Ion Exchange01:17

Ion Exchange

Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or basic...
Lattice Centering and Coordination Number02:33

Lattice Centering and Coordination Number

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...

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関連する実験動画

Updated: May 23, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
06:44

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

無水質陽子の伝導性のためのコーディネーションネットワークベースのイオンプラスチック結晶.

Satoshi Horike1, Daiki Umeyama, Munehiro Inukai

  • 1Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan. horike@sbchem.kyoto-u.ac.jp

Journal of the American Chemical Society
|April 20, 2012
PubMed
まとめ
この要約は機械生成です。

新しいイオン協調ネットワークは,プラスチック結晶の振る舞いを示し,重要な陽子伝導性を可能にします. この材料は,陽子伝導装置における潜在的なアプリケーションのための効率的なイオン移動性を実証しています.

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
05:33

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
12:30

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework

Published on: April 9, 2018

関連する実験動画

Last Updated: May 23, 2026

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
06:44

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
05:33

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework
12:30

Synthesis of a Thiol Building Block for the Crystallization of a Semiconducting Gyroidal Metal-sulfur Framework

Published on: April 9, 2018

科学分野:

  • マテリアルサイエンス 材料科学
  • 固体化学 固体化学
  • クリスタログラフィーです.

背景:

  • 陽子の伝導性は,燃料電池のようなエネルギーアプリケーションにとって非常に重要です.
  • 高温で高陽子移動性を有する新材料の開発は,継続的な課題です.

研究 の 目的:

  • 新しいイオン系協調ネットワークを合成し,特徴づけること.
  • 材料のイオンダイナミクスと陽子の伝導性特性を調査する.

主な方法:

  • 陽子化イミダゾールとアニオン性Zn2+) リン酸鎖を含むイオン結合ネットワークの合成.
  • 水晶格子構造とイオン移動性の分析.
  • 湿度なしで高温で陽子の伝導性を測定する.

主要な成果:

  • ユニークなイオン系協調ネットワークの成功合成.
  • 結晶格子内の高度な移動性イオンの観察,イオン性プラスチック結晶の特徴.
  • 湿度に関係なく130°Cで,陽子の伝導率2.6 × 10−4) S cm−1) を達成しました.

結論:

  • 合成されたイオン協調ネットワークは,イオンプラスチック結晶の振る舞いを表しています.
  • この材料は,ダイナミックなイオン移動によって推進される,有望な陽子伝導性を示しています.
  • この発見は,高度な材料における湿度に依存しない陽子伝導体への道を開く.