分子尺度纹理表面的疏水性:地质石灰石模酸框架的案例,一个原子学的视角
Andrea Le Donne1, Josh D Littlefair1, Marco Tortora2
1Dipartimento di Scienze Chimiche, Farmaceutiche ed Agrarie (DOCPAS), Università degli Studi di Ferrara (Unife), Via Luigi Borsari 46, I-44121 Ferrara, Italy.
The Journal of chemical physics
|November 13, 2023
概括
在ZIF-8材料中,疏水性是由亚纳米级表面波纹增强的,而不仅仅是化学成分. 修改连接器终结和化可以调整水相互作用,用于先进的材料应用.
科学领域:
- 材料科学 材料科学 材料科学
- 表面化学 表面化学
- 计算化学计算化学
背景情况:
- 材料的疏水性对于许多应用程序至关重要,受表面化学和几何学的影响.
- 表面粗性可以放大材料内在的疏水性.
- 晶体多孔材料,如金属有机框架 (MOF),具有分子尺度的纹理.
研究的目的:
- 为了研究ZIF-8的疏水性质,MOF具有显著的疏水性.
- 了解化学成分和亚纳米级表面波纹对ZIF-8的疏水性有何影响.
- 探索在复杂的多孔材料中表征疏水性的方法.
主要方法:
- 利用"几何"和"能量"计算方法来确定接触角度.
- 使用Young-Dupré公式来计算液体-固体粘附能量.
- 研究了表面链接器终结 (sp3 N vs. sp2 N) 和化类似物的影响.
主要成果:
- ZIF-8的疏水性是由其化学构成及其独特的亚纳米级表面波纹驱动的.
- 计算方法揭示了纳米级的温泽尔样湿在波纹ZIF-8表面.
- 表面连接器终结显著影响疏水性,与sp3 N相比,sp2 N的性能降低了.
- 化链接剂促进了向纳米Cassie-Baxter类状态的过渡,增强了疏水性.
结论:
- 增强的ZIF-8的疏水性源于内在特性和纳米物理特征的结合.
- 该研究强调了在复杂的多孔材料中表征疏水性的挑战和方法.
- 定制表面链接器化学和结构为调整MOF的疏水行为提供了一条途径.
相关概念视频
Intermolecular Forces
58.5K
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...
58.5K
Noncovalent Attractions in Biomolecules
51.6K
Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
51.6K


