在聚合物Zwitterions附近,盐屏过渡到散装水动力学
Shawn D Mengel1, Audra J DeStefano1, Thomas Webber1
1Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States.
ACS macro letters
|July 12, 2024
概括
兹维特里欧尼克材料是采用的.
科学领域:
- 材料科学 材料科学 材料科学
- 表面化学 表面化学
- 生物材料是一种生物材料.
背景情况:
- 兹维特里昂材料表现出优异的防性质,这归因于它们的表面水化结构.
- 有限的实验数据存在于zwitterionic部分周围的水化水动态.
- 了解远程水化效应对于调节聚合物表面与溶解物相互作用至关重要.
研究的目的:
- 实验性地研究各种zwitterion化学的水合水结构和动态.
- 探测离子环境对zwitterion表面水分的影响.
- 为了阐明紫外线材料抗性能背后的机制.
主要方法:
- 使用Overhauser动态核极化 (ODNP) 放松计来研究水分子动态.
- 这项研究的重点是水的扩散在zwitterionic表面大约1nm内.
- 与未充电的水友和阴离子侧链进行了比较.
主要成果:
- 与其他水友或阴离子组相比,zwitterions附近的水动力学受到最小的抑制.
- 发现特定的溶解离子可以在zwitterions附近增强水的扩散性.
- 兹维特里昂的水化外的行为与散装水的行为类似.
结论:
- 兹维特里昂的表面水分几乎无法与散装水区分,这挑战了以前的假设.
- 防性能受离子环境和zwitterionic表面设计的影响.
- 兹维特里昂表面对生物分子来说可能是"看不见的",可以通过离子条件来调整.
相关概念视频
02:42Aqueous Solutions and Heats of Hydration
14.6K
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...
14.6K
03:13Intermolecular Forces
58.1K
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...
58.1K
03:00Solubility
17.4K
Solution, Solubility, and Solubility Equilibrium
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).
In a solution, the solute particles (molecules,...
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).
In a solution, the solute particles (molecules,...
17.4K
01:17Ion Exchange
573
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...
573
02:34Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility
44.2K
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...
Temporary attractive forces like dispersion are present in all molecules, whether they are polar or nonpolar. They...
44.2K
02:05Entropy and Solvation
7.0K
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...
7.0K