大量与二碳氧化二离子体的界面水溶解相比,二氧化二离子体的水溶解相比
Babak Minofar1, Martin Mucha, Pavel Jungwirth
1Contribution from the Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, Flemingovo nam. 2, 16610 Prague 6, Czech Republic.
Journal of the American Chemical Society
|September 16, 2004
概括
我们使用光谱学和模拟研究了二碳酸二离子与水的相互作用. 较长的二碳酸盐链从散水转移到表面,影响其结构和溶解.
科学领域:
- 物理化学 物理化学
- 计算化学的计算化学
- 频谱学是一种光谱学.
背景情况:
- 双碳酸二离子在各种化学和生物系统中都很重要.
- 了解它们的溶解对于预测它们在水环境中的行为至关重要.
研究的目的:
- 为了研究在水集群和延伸板块中具有不同异形链长度的二氧化酸二的溶解行为.
- 为了阐明二碳酸盐溶解中的水友和水害相互作用之间的相互作用.
主要方法:
- 采用光电子光谱法探测水合二碳酸二离子.
- 用分子动力学模拟来建模溶解结构和动力学.
主要成果:
- 在与电荷分布相关的解法中观察到偶奇效应.
- 确定了从散装水到水/蒸汽接口的溶解过渡,用于较长的二碳酸盐.
- 形状的变化和形链的折叠与溶解模式有关.
结论:
- 酸链的长度显著影响二碳酸盐溶解,决定它们在水系中的位置.
- 水友和疏水性相互作用相互竞争,导致不同的溶解和结构安排.
- 结果提供了有关充电有机分子在水溶液和接口中的行为的见解.
相关概念视频
01:12Solvents
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...
A...
03:37Molecular Shape and Polarity
Dipole Moment of a Molecule
02:28Intermolecular Forces in Solutions
The formation of a solution is an example of a spontaneous process, a process that occurs under specified conditions without energy from some external source.
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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. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
02:56Intermolecular Forces and Physical Properties
03:00Solubility
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A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
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02:05Entropy and Solvation
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 ≥ 15); an...