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相关概念视频

Molecular and Ionic Solids02:54

Molecular and Ionic Solids

20.2K
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...
20.2K
Ionic Radii03:10

Ionic Radii

33.8K
Ionic radius is the measure used to describe the size of an ion. A cation always has fewer electrons and the same number of protons as the parent atom; it is smaller than the atom from which it is derived. For example, the covalent radius of an aluminum atom (1s22s22p63s23p1) is 118 pm, whereas the ionic radius of an Al3+ (1s22s22p6) is 68 pm. As electrons are removed from the outer valence shell, the remaining core electrons occupying smaller shells experience a greater effective nuclear...
33.8K
Ionic Bonds00:42

Ionic Bonds

131.7K
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...
131.7K
Solubility of Ionic Compounds02:55

Solubility of Ionic Compounds

68.3K
Solubility is the measure of the maximum amount of solute that can be dissolved in a given quantity of solvent at a given temperature and pressure. Solubility is usually measured in molarity (M) or moles per liter (mol/L). A compound is termed soluble if it dissolves in water.
68.3K
Ionic Crystal Structures02:42

Ionic Crystal Structures

17.7K
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...
17.7K
Ionic Compounds: Formulas and Nomenclature03:34

Ionic Compounds: Formulas and Nomenclature

88.1K
An element composed of atoms that readily lose electrons (a metal) can react with an element composed of atoms that readily gain electrons (a nonmetal) to produce ions through complete electron transfer. The compound formed by this transfer is stabilized by the electrostatic attractions (ionic bonds) between the oppositely charged ions.
88.1K

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相关实验视频

Updated: Feb 12, 2026

Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids
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Pretreatment of Lignocellulosic Biomass with Low-cost Ionic Liquids

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设计用于PEDOT:PSS导电增强的离子液体

Ambroise de Izarra1,2, Seongjin Park1, Jinhee Lee1

  • 1Department of Energy Science and Engineering , DGIST , Daegu 42988 , Korea.

Journal of the American Chemical Society
|April 11, 2018
PubMed
概括
此摘要是机器生成的。

离子液体通过促进离子交换和PEDOT域的增长来增强Poly-3,4-乙烯二氧化硫 (PEDOT:PSS) 的导电性. 最有效的离子液体促进有效的离子交换,并保持均的电荷载体以提高导电性.

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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids
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From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
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科学领域:

  • 材料科学
  • 聚合物化学
  • 计算化学

背景情况:

  • 聚-3,4-乙烯二氧化:聚烯硫酸盐 (PEDOT:PSS) 是一个有前途的导电聚合物用于柔性电子.
  • 它的导电性受到环绕导电性Poly-3,4-乙烯二氧化 (PEDOT) 芯的绝缘聚硫酸盐 (PSS) 层的限制.
  • 离子液体 (ILs) 已经显示出增强PEDOT:PSS导电性的潜力,但机制尚不清楚.

研究的目的:

  • 阐明离子液体增强PEDOT:PSS导电性的机制.
  • 建立用于PEDOT:PSS应用的高性能离子液体的设计原则.
  • 为提高导电性确定新的离子液体候选物.

主要方法:

  • 在最小 PEDOT:PSS 模型上进行密度函数理论 (DFT) 自由能量计算.
  • 在溶液中使用较大的PEDOT:PSS模型进行分子动力学 (MD) 模拟.
  • 对离子交换效率,PEDOT形态和电荷载体分布的分析.

主要成果:

  • 最有效的IL是那些具有最低的结合能,促进有效的离子交换.
  • 离子交换导致PEDOT与PSS脱,形成由IL离子装饰的大规模导电PEDOT域.
  • 最佳的IL离子在PEDOT骨干中保持均的电荷载体分布,从而提高导电性.

结论:

  • 高性能IL必须促进有效的离子交换以改善PEDOT形态和统一的高水平p-doping以提高内在导电性.
  • 基于这些原则,提出了一种具有特定电子吸收,体积庞大,柔软和疏水性能的新IL对.