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関連する概念動画

Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

41.9K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions. 
41.9K
Ionic Crystal Structures02:42

Ionic Crystal Structures

14.6K
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...
14.6K
Alkyl Halides02:45

Alkyl Halides

17.1K
Structural Properties
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
17.1K
Ionic Bonds00:42

Ionic Bonds

118.8K
Overview
When atoms gain or lose electrons to achieve a more stable electron configuration they form ions. Ionic bonds are electrostatic attractions between ions with opposite charges. Ionic compounds are rigid and brittle when solid and may dissociate into their constituent ions in water. Covalent compounds, by contrast, remain intact unless a chemical reaction breaks them.
Opposing Charges Hold Ions Together in Ionic Compounds
Ionic bonds are reversible electrostatic interactions between ions...
118.8K
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

43.7K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
43.7K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

27.1K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
27.1K

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関連する実験動画

Updated: Aug 15, 2025

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

69.1K

インターフェース結合ハリドによって可能となる超伝導ハリドフレームワーク

Jiamin Fu1,2, Shuo Wang3, Jianwen Liang1

  • 1Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada.

Journal of the American Chemical Society
|December 30, 2022
PubMed
まとめ
この要約は機械生成です。

研究者は固体電解質のための新しいゼオライトのようなハライド構造を発見した. これらの材料は リチウムイオン伝導が 速く進み,先進的な固体電池の 開発の道を開いています

科学分野:

  • 材料科学
  • 電気化学
  • 固体化学

背景:

  • 立方体ハリド (Li-M-X) は,カトド互換性およびイオン伝導性により,固体電池のための有望な固体電解質 (SSE) である.
  • 既存の超離子ハライドSSEは,しばしば四面体支援のLi+拡散経路を持つ[MCl6]八面体を有する.

研究 の 目的:

  • 固体電解質の性能を向上させるため,ゼオライトのような新型ハライドフレームワークを導入する.
  • これらの新しいハライド構造におけるイオン伝導性とLi+拡散機構を調査する.

主な方法:

  • Ab initio分子動力学シミュレーションで,Li+拡散を検証する.
  • ハライド種をSmCl3フレームワークに埋め込み,移動性イオンを作成する.
  • 30 °Cでのイオン伝導度測定

主要な成果:

  • 1Dチャネルと[SmCl9]6-トライカップドトライゴナルプリズマを備えた,ゼオライトのようなハライドフレームワークの新種が報告されました.
  • 2.08 Åの短いジャンプ距離の急速なLi+拡散はシミュレーションによって確認された.
  • 10−4 S cm-1を超えるイオン伝導性は,吸着剤としてLiClを用いて30 °Cで達成された.

さらに関連する動画

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV

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

Published on: April 9, 2018

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関連する実験動画

Last Updated: Aug 15, 2025

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

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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV

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

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結論:

  • ゼオライトのようなハライドフレームワークは,超音波導体の新しい構造モチーフを提供します.
  • MCl3/ハリド複合物のイオン伝導性は,移植されたハリド伝導性,界面結合,およびフレームの特性と相関しています.
  • この研究はハライド基のSSEの設計原理を拡張し,超音波導体開発におけるイノベーションを促進します.