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関連する概念動画

Ionic Crystal Structures02:42

Ionic Crystal Structures

16.9K
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...
16.9K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

30.8K
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...
30.8K
Crystal Growth: Principles of Crystallization01:25

Crystal Growth: Principles of Crystallization

4.9K
Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
Initiating crystallization involves manipulating the concentration of the solute and the temperature of the solution. Since crystal growth occurs when the ratio of concentration and solubility of the solute in the solvent...
4.9K
Conduct Disorder01:28

Conduct Disorder

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Conduct disorder is a complex mental health diagnosis characterized by a repetitive and persistent pattern of behavior that violates societal norms, the rights of others, or age-appropriate rules. The diagnostic criteria for conduct disorder require the presence of at least three problematic behaviors within the past 12 months, with at least one occurring in the past six months. These behaviors are grouped into four categories: aggression toward people and animals; destruction of property;...
513
Conduction System of the Heart01:19

Conduction System of the Heart

12.8K
Autorhythmicity is a term that refers to the heart's inherent ability to generate electrical signals and instigate muscle contractions. This self-regulating conduction system within the heart consists of two key components: the pacemaker cells and specialized conducting cells.
The pacemaker cells are located in two primary nodes: the sinoatrial (SA) node and the atrioventricular (AV) node. The SA node pacemaker cells can autonomously depolarize, triggering an action potential that leads to the...
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Conduction System of the Heart01:20

Conduction System of the Heart

3.6K
The cardiac conduction system produces and transmits electrical impulses that prompt myocardial contraction, ensuring efficient heart function. This intricate system ensures that the heart beats in a coordinated and efficient manner, beginning with the atria and then the ventricles. The conduction system optimizes cardiac output by maintaining this precise sequence, which is crucial for adequate blood circulation.
This system relies on the unique properties of nodal and Purkinje cells:...
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Updated: Jan 24, 2026

Transport Properties of Ibuprofen Encapsulated in Cyclodextrin Nanosponge Hydrogels: A Proton HR-MAS NMR Spectroscopy Study
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Transport Properties of Ibuprofen Encapsulated in Cyclodextrin Nanosponge Hydrogels: A Proton HR-MAS NMR Spectroscopy Study

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プロトン伝導のためのアンフィフィリックサイクロデクストリンベースの液晶

Pier-Luc Champagne, David Ester1, Danielle Polan

  • 1Department of Chemistry , Simon Fraser University , 8888 University Drive , Burnaby , British Columbia V5A 1S6 , Canada.

Journal of the American Chemical Society
|May 24, 2019
PubMed
まとめ

新型サイクロデクストリンベースの材料は,プロトン伝導のための液晶を形成します. これらの環境に優しいアンフィフィリックポリ ((カーボキシル酸) は,高伝導性を示し,新しい陽子伝導材料の道を開く.

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Synthesis of Biocompatible Liquid Crystal Elastomer Foams as Cell Scaffolds for 3D Spatial Cell Cultures
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Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
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Transport Properties of Ibuprofen Encapsulated in Cyclodextrin Nanosponge Hydrogels: A Proton HR-MAS NMR Spectroscopy Study
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Transport Properties of Ibuprofen Encapsulated in Cyclodextrin Nanosponge Hydrogels: A Proton HR-MAS NMR Spectroscopy Study

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Synthesis of Biocompatible Liquid Crystal Elastomer Foams as Cell Scaffolds for 3D Spatial Cell Cultures
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Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
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科学分野:

  • 材料科学
  • ポリマー化学
  • 超分子化学

背景:

  • サイクロデキストリン (CD) は,ユニークな構造特性を有する多用途の循環性オリゴサッカリドです.
  • 燃料電池のような エネルギー利用に不可欠です
  • 持続可能な資源から新しい陽子伝導材料を開発することは重要な研究分野です.

研究 の 目的:

  • 新型サイクロデクストリン (CD) 基のアンフィフィリックポリ ((カーボキシル酸) をプロトン伝導体として調査する.
  • これらの新材料の自己組織化と 液晶の性質を研究する
  • これらのCDベースの材料の質素伝導性を固体状態で評価する.

主な方法:

  • 毒性のないサイクロデクストリンを用いたアンフィフィリックポリ (炭酸) の合成.
  • 高度に秩序付けられたスメクティック液晶メソフェーズへの自己組み立ての特徴.
  • 温度と湿度が異なる条件下での陽子伝導性の測定.

主要な成果:

  • 合成された材料は,明確に定義された液体結晶メソフェーズに自己組み立てられました.
  • メソフェーズ内で長距離2Dの水素結合ネットワークが形成された.
  • 70 °Cと95%の湿度で1.4 × 10−2 S cm−1までの印象的な固体陽子伝導性が達成された.

結論:

  • アンフィフィリックサイクロデクストリンベースの液晶は,新種の陽子伝導材料を表しています.
  • 独特の構造と水素結合ネットワークは高プロトン伝導性に寄与する.
  • この環境に優しい材料は 陽子伝導装置の応用に 有望な代替材料となります