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関連する概念動画

Cohesion01:07

Cohesion

Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
On a surface,...
Intermolecular Forces03:13

Intermolecular Forces

Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
Intermolecular Forces03:13

Intermolecular Forces

Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
Introduction to Chemical Bonds01:01

Introduction to Chemical Bonds

Chemical Bonds
The electrons of the outermost energy level determine the energetic stability of the atom and its tendency to form chemical bonds with other atoms. The innermost electron shell has a maximum capacity of two electrons, but the next two electron shells can each have a maximum of eight electrons. This is known as the octet rule, which states that, with the exception of the innermost shell, atoms are most stable energetically when they have eight electrons in their valence shell, the...
Covalent Bonds01:08

Covalent Bonds

Overview
When two atoms share electrons to complete their valence shells, they create a covalent bond. An atom's electronegativity—the force with which shared electrons are pulled towards an atom—determines how the electrons are shared. Molecules formed with covalent bonds can be either polar or nonpolar. Atoms with similar electronegativities form nonpolar covalent bonds; the electrons are shared equally. Atoms with different electronegativities share electrons unequally, creating polar bonds.
Combining Functions01:16

Combining Functions

Functions can be combined to form new mathematical models that describe interactions between variables. These combinations are fundamental in understanding relationships between changing quantities and are commonly encountered in scientific and engineering contexts. The combination methods—addition, subtraction, multiplication, division, and composition—each have unique implications for the resulting function’s domain and behavior.When combining functions through arithmetic operations, such...

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関連する実験動画

Updated: Jul 8, 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

ハロゲン結合:液晶形成のための新しい相互作用.

H Loc Nguyen1, Peter N Horton, Michael B Hursthouse

  • 1Department of Chemistry, University of Exeter, Stocker Road, EXETER EX4 4QD, UK.

Journal of the American Chemical Society
|January 8, 2004
PubMed
まとめ

研究者は,ハロゲン結合が液晶の性質を誘導できることを実証しています. 特定の非メソモルフィック化合物を混合すると,初めて熱中性スメクティックAとネマティック相を示す複合体が生成されます.

科学分野:

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

背景:

  • 液晶は,従来の液体と固体結晶の間の性質を示しています.
  • ハロゲン結合は,ハロゲン原子と電子ドナーを含む非共性相互作用である.
  • 非メソモルフィックの材料で液晶性を誘導することは,大きな課題です.

研究 の 目的:

  • 液晶の振る舞いを誘導するハロゲン結合の可能性を調査する.
  • 新しいハロゲン結合複合体を合成し,特徴づけること.
  • 結果的な複合体の相行動を探求する.

主な方法:

  • 4アルコキシスティルバゾールとペンタフッ化オドベンゼン間の1:1複合体の合成.
  • 複雑な整合性を確認するために,X線単結晶分析.
  • 熱熱的相行動分析 (スメクティックAとネマティック相).

主要な成果:

  • 安定した1:1ハロゲン結合複合体の形成が確認されました.
  • 複合体は,熱心な液体結晶の振る舞いを示した.
  • 観察された特定のメソフェーズには,スメクティックAとネマティックフェーズが含まれています.

さらに関連する動画

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
06:24

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

関連する実験動画

Last Updated: Jul 8, 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

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets
06:26

Orientational Transition in a Liquid Crystal Triggered by the Thermodynamic Growth of Interfacial Wetting Sheets

Published on: May 15, 2017

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
06:24

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

結論:

  • ハロゲン結合は,非メソモルフィック化合物の液晶の振る舞いを誘導するための有効な戦略です.
  • 合成された複合体は,ハロゲン結合液晶の新しいクラスを表しています.
  • この発見は,調節可能な特性を有する機能的な材料の設計に新たな道を開きます.