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相关概念视频

Ionic Crystal Structures02:42

Ionic Crystal Structures

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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...
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Ion Exchange01:17

Ion Exchange

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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...
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Anionic Chain-Growth Polymerization: Overview01:20

Anionic Chain-Growth Polymerization: Overview

2.1K
The polymerization process that involves carbanion as an intermediate is called anionic polymerization. It is also a type of addition or chain-growth polymerization. Anionic polymerization gets initiated by a strong nucleophile such as an organolithium or a Grignard reagent. The most commonly used initiator for anionic polymerization is butyl lithium. Monomers involved in anionic polymerization must possess a vinyl group bonded to one or two electron-withdrawing groups. For instance,...
2.1K
Cationic Chain-Growth Polymerization: Mechanism00:57

Cationic Chain-Growth Polymerization: Mechanism

2.4K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
2.4K
Anionic Chain-Growth Polymerization: Mechanism01:04

Anionic Chain-Growth Polymerization: Mechanism

2.1K
The mechanism for anionic chain-growth polymerization involves initiation, propagation, and termination steps. In the initiation step, a nucleophilic anion, such as butyl lithium, initiates the polymerization process by attacking the π bond of the vinylic monomer. As a result, a carbanion, stabilized by the electron‐withdrawing group, is generated. The resulting carbanion acts as a Michael donor in the propagation step and attacks the second vinylic monomer, which acts as a Michael...
2.1K
Molecular and Ionic Solids02:54

Molecular and Ionic Solids

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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...
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Updated: Jul 26, 2025

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

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新的有机离子塑料晶体利用了形态酸.

Azra Sourjah1, Colin S M Kang1, Cara M Doherty2

  • 1Institute for Frontier Materials, Deakin University, Burwood, VIC 3125, Australia. jenny.pringle@deakin.edu.au.

Physical chemistry chemical physics : PCCP
|June 12, 2023
PubMed
概括
此摘要是机器生成的。

新的基于形态的有机离子塑料晶体 (OIPC) 为电池提供了更安全,准固态离子导电. 酸中的以太功能组增强了用于清洁能源应用的电解质特性.

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Synthesis and Exfoliation of Discotic Zirconium Phosphates to Obtain Colloidal Liquid Crystals
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科学领域:

  • 材料科学 材料科学 材料科学
  • 电化学 电化学 电化学
  • 固态化学 固态化学

背景情况:

  • 有机离子塑料晶体 (OIPC) 是下一代电池的有希望的准固态电解质.
  • 更深入地了解OIPC中的结构-属性关系对于优化其性能至关重要.
  • 目前正在探索以功能组的酸盐以增强离子运输.

研究的目的:

  • 合成和描述基于形态的新型OIPC.
  • 研究阴离子结构和离子选择对OIPC特性的影响.
  • 评估OIPC的潜在应用在先进的能源存储.

主要方法:

  • 不同扫描热量计 (DSC) 和热重量计分析 (TGA) 测量热行为.
  • 电化学阻抗光谱 (EIS) 用于离子导电.
  • 位子灭绝寿命光谱 (PALS) 用于自由体积分析.
  • 固态核磁共振 (NMR) 用于离子动态.
  • 循环电压计 (CV) 用于电化学稳定性.

主要成果:

  • [C2mmor][FSI]表现出最广泛的I相范围 (11129 °C).
  • [C(i3)mmor][FSI]显示了最高的导电性 (1 × 10−6 S cm−1 在30 °C).
  • [C2mmor][TFSI]显示了最大的空缺体积 (132 Å3).

结论:

  • 以甲基基的OIPC与以太功能组显示可调节的热和传输特性.
  • 这些OIPC显示出作为清洁能源应用,特别是电池的电解质的潜力.
  • 了解阴离子/离子效应是设计优化OIPC电解质的关键.