Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Entropy and Solvation02:05

Entropy and Solvation

6.9K
The process of surrounding a solute with solvent is called solvation. It involves evenly distributing the solute within the solvent. The rule of thumb for determining a solvent for a given compound is that like dissolves like. A good solvent has molecular characteristics similar to those of the compound to be dissolved. For example, polar solutions dissolve polar solutes, and apolar solvents dissolve apolar solutes. A polar solvent is a solvent that has a high dielectric constant (ϵ...
6.9K
Chemical and Solubility Equilibria02:21

Chemical and Solubility Equilibria

4.0K
The free energy change associated with dissolving a solute in a liter of solvent is called the free energy of a solution, ΔGsolution. The overall ΔGsolution is expressed as the balance of ΔGinteraction against the always-favorable free-energy of mixing, ΔGmixing. Solution formation is favorable if  ΔGsolution is less than zero, whereas it is unfavorable if ΔGsolution is greater than zero. In short, for a solution to form and complete dissolution to take place,...
4.0K
Intermolecular Forces and Physical Properties02:56

Intermolecular Forces and Physical Properties

20.2K
20.2K
Solvents01:12

Solvents

63.9K
A solvent is a substance, most often a liquid, that can dissolve other substances. Here, the substance being dissolved is called a solute. When a solvent and a solute combine, they form a solution - a homogenous mixture of both the solvent and the solute. Water is a universal biological solvent. Its polar structure allows it to dissolve many other polar compounds. The ability of water to dissolve is governed by a balance between water molecules binding to each other and binding to the solute.
A...
63.9K
Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility02:34

Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility

43.5K
Intermolecular forces are attractive forces that exist between molecules. They dictate several bulk properties, such as melting points, boiling points, and solubilities (miscibilities) of substances. Molar mass, molecular shape, and polarity affect the strength of different intermolecular forces, which influence the magnitude of physical properties across a family of molecules.
Temporary attractive forces like dispersion are present in all molecules, whether they are polar or nonpolar. They...
43.5K
Energetics of Solution Formation02:35

Energetics of Solution Formation

6.7K
The formation of a solution is an example of a spontaneous process, which is a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Formation of the solution requires the solute–solute and solvent–solvent...
6.7K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Microplastic Contamination in Salted Dried Beef.

Scientifica·2026
Same author

Dependency of Morphology and Wetting on Alkyl Chain Length in Vacuum-Evaporated [C<i><sub>n</sub></i>py][NTf<sub>2</sub>] (<i>n</i> = 2-9) Pyridinium Ionic Liquid Films.

Langmuir : the ACS journal of surfaces and colloids·2026
Same author

Can Gas Absorption be Tuned in a Multifunctional Ionic Liquid?

ChemSusChem·2025
Same author

Cyanopyridinium-Based Ionic Liquids and Their Mixtures for Ethylene and Ethane Separation.

ACS sustainable chemistry & engineering·2025
Same author

Unveiling the Effect of Aqueous-Phase Dynamics on Chitosan Hydrogel Film Mechanical Properties Through AFM Nanoindentation and Tensile Testing.

Gels (Basel, Switzerland)·2025
Same author

Stepwise Conformational Disorder in an Ionic Plastic Crystal.

The journal of physical chemistry. B·2025

相关实验视频

Updated: May 13, 2025

Preparation of Binary and Ternary Deep Eutectic Systems
06:15

Preparation of Binary and Ternary Deep Eutectic Systems

Published on: October 31, 2019

11.7K

揭示了基于糖醇的深度欧性溶剂中的分子相互作用.

Letícia A Souza1, Beatriz R de Moraes1, Rafael M de Souza1

  • 1Laboratório de Espectroscopia Molecular, Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, São Paulo, 05508000, Brazil. raando@iq.usp.br.

Physical chemistry chemical physics : PCCP
|April 15, 2025
PubMed
概括

阴离子显著影响深层性溶剂 (DES) 的结构和动态. 较强的甘-离子相互作用,特别是与化物相互作用,会影响局部液态动力学和整体溶剂特性.

更多相关视频

In vitro Digestion of Emulsions in a Single Droplet via Multi Subphase Exchange of Simulated Gastrointestinal Fluids
10:20

In vitro Digestion of Emulsions in a Single Droplet via Multi Subphase Exchange of Simulated Gastrointestinal Fluids

Published on: November 18, 2022

2.4K
Highly Stereoselective Synthesis of 1,6-Ketoesters Mediated by Ionic Liquids: A Three-component Reaction Enabling Rapid Access to a New Class of Low Molecular Weight Gelators
06:31

Highly Stereoselective Synthesis of 1,6-Ketoesters Mediated by Ionic Liquids: A Three-component Reaction Enabling Rapid Access to a New Class of Low Molecular Weight Gelators

Published on: November 27, 2015

8.7K

相关实验视频

Last Updated: May 13, 2025

Preparation of Binary and Ternary Deep Eutectic Systems
06:15

Preparation of Binary and Ternary Deep Eutectic Systems

Published on: October 31, 2019

11.7K
In vitro Digestion of Emulsions in a Single Droplet via Multi Subphase Exchange of Simulated Gastrointestinal Fluids
10:20

In vitro Digestion of Emulsions in a Single Droplet via Multi Subphase Exchange of Simulated Gastrointestinal Fluids

Published on: November 18, 2022

2.4K
Highly Stereoselective Synthesis of 1,6-Ketoesters Mediated by Ionic Liquids: A Three-component Reaction Enabling Rapid Access to a New Class of Low Molecular Weight Gelators
06:31

Highly Stereoselective Synthesis of 1,6-Ketoesters Mediated by Ionic Liquids: A Three-component Reaction Enabling Rapid Access to a New Class of Low Molecular Weight Gelators

Published on: November 27, 2015

8.7K

科学领域:

  • 物理化学 物理化学
  • 材料科学 材料科学 材料科学
  • 超分子化学 超分子化学

背景情况:

  • 深度浸泡溶剂 (DES) 是具有独特性质的可调节材料.
  • 了解DES的液体结构是其应用的关键.
  • 特定离子在DES结构和动态中的作用需要进一步研究.

研究的目的:

  • 调查阴离子 (化物与化物) 对液体结构和DES的局部相互作用的影响.
  • 为了探索四甲基盐-甘油混合物的相态度和结合.
  • 为了阐明阴离子-甘油相互作用对DES动态的影响.

主要方法:

  • 不同扫描热量计 (DSC) 用于相位行为分析.
  • 红外 (IR) 和远红外 (FIR) 光谱用于探测键和动态.
  • 量子化学计算和分子动力学 (MD) 模拟用于结构和动态洞察力.

主要成果:

  • 甲基化/化与甘油的混合物在室温下形成稳定的液体,并具有特定的盐成分 (x_盐 = 0.25).
  • 对化物而言,与化物相比,在甘和离子之间观察到更强的键.
  • MD模拟证实了持续的甘油-甘油键,并揭示了由于受限效应而导致局部动态的阳离子诱导的变化.

结论:

  • 阴离子在决定DES内的液体结构和局部相互作用方面发挥着关键作用.
  • 阳离子-甘油相互作用显著影响溶剂的特性和动态.
  • 这项研究提供了对DES结构-属性关系的基本见解,这对于设计新材料至关重要.