碳化合物阿达曼坦在无形冰中的疏水性水合
Sukhpreet K Talewar1, Luis Carlos Pardo2, Thomas F Headen3
1Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, UK. c.salzmann@ucl.ac.uk.
Faraday discussions
|October 5, 2023
概括
疏水性阿达曼坦分子可以在无形冰中水,形成一个由28个水分子组成的结构子. 化改善了水分子的方向和水结合在这种疏水性水化外.
科学领域:
- 物理化学 物理化学
- 材料科学 材料科学 材料科学
- 天体化学是天体化学.
背景情况:
- 疏水分子本质上很难在水中水.
- 以前的研究经常使用两性分子来实现溶解性.
- 对各种科学领域来说,了解疏水性水合是非常重要的.
研究的目的:
- 为了研究疏水性阿达曼坦分子的完全水.
- 描述水分子在无形冰中围绕阿达曼坦的结构.
- 探索对疏水水和天体物理环境的影响.
主要方法:
- 亚达曼坦和水的蒸汽编解在冷却基板 (80K) 上.
- 通过同位素置换和经验潜能结构精细化进行中子衍射.
- 里埃变换红外光谱 (FT-IR) 和样本回火 (140K).
主要成果:
- 阿达曼坦形成了一个结构良好的28个水分子的第一个水合外,类似于克拉特酸盐.
- 水分子的方向最初是混合的,但在回火后得到了改进.
- 在无形冰矩阵中加入阿达曼坦削弱了键.
结论:
- 在无形冰中对阿达曼坦的矩阵分离为疏水性水合提供了一个模型.
- 这项研究揭示了与天体物理环境相关的水-冰-碳化合物相互作用的见解.
- 观察到的结构和光谱变化为疏水性水化提供了一个独特的视角.
相关概念视频
Entropy and Solvation
7.1K
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...
7.1K
Aldehydes and Ketones with Water: Hydrate Formation
3.3K
An oxygen-based nucleophile, like water, can undergo addition reactions with aldehydes and ketones. The reaction leads to the formation of hydrates, also referred to as 1,1-diols or geminal diols.
The formation of hydrates is a reversible reaction. Hydrate formation is influenced by steric and electronic factors accompanying the alkyl substituents on the carbonyl group: The rate of hydrate formation increases with a decrease in the number of alkyl groups attached to the carbonyl carbon. Hence,...
The formation of hydrates is a reversible reaction. Hydrate formation is influenced by steric and electronic factors accompanying the alkyl substituents on the carbonyl group: The rate of hydrate formation increases with a decrease in the number of alkyl groups attached to the carbonyl carbon. Hence,...
3.3K
States of Water
50.9K
Water exists in any one of the three classical states: solid (ice), liquid (water), and gas (steam or water vapor). The state of water depends on i) the intermolecular forces that draw molecules together and ii) the kinetic energy that leads to movements that pull them apart.
Water freezes when the intermolecular forces are greater than the kinetic energy. Unlike most other substances, water is less dense in its solid state than in its liquid state. This is because each water molecule can form...
Water freezes when the intermolecular forces are greater than the kinetic energy. Unlike most other substances, water is less dense in its solid state than in its liquid state. This is because each water molecule can form...
50.9K
Regioselectivity and Stereochemistry of Acid-Catalyzed Hydration
8.5K
The rate of acid-catalyzed hydration of alkenes depends on the alkene's structure, as the presence of alkyl substituents at the double bond can significantly influence the rate.
8.5K
Aqueous Solutions and Heats of Hydration
14.7K
Water and other polar molecules are attracted to ions. The electrostatic attraction between an ion and a molecule with a dipole is called an ion-dipole attraction. These attractions play an important role in the dissolution of ionic compounds in water.
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process...
14.7K
Intermolecular Forces
58.6K
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...
58.6K


