三体相互作用对酸盐玻璃结构特征的影响,来自分子动力学模拟
Navid Marchin1, Shingo Urata2, Jincheng Du1
1Department of Materials Science and Engineering, University of North Texas, Denton, Texas 76203, USA.
The Journal of chemical physics
|October 16, 2024
概括
在分子动力学模拟中添加三体术语对于准确建模酸盐玻璃结构至关重要. 这种增强改进了四面体间角和物种的描述,将模拟与实验数据对齐.
科学领域:
- 材料科学 材料科学 材料科学
- 计算化学的计算化学
- 凝聚物质物理学 凝聚物质物理学
背景情况:
- 酸盐玻璃对于许多技术应用至关重要.
- 分子动力学 (MD) 模拟是玻璃结构建模的标准.
- 对于酸盐和酸玻璃,部分电荷双向电位已经成功.
研究的目的:
- 调查三体术语在MD模拟中对于酸玻璃的必要性.
- 为了提高酸盐玻璃结构建模的准确性.
- 为了验证模拟结果与实验数据对比.
主要方法:
- 利用了带有和没有三体术语的分子动力学模拟.
- 将模拟输出与实验数据进行比较,包括中子结构因子.
- 与第一原则密度函数理论 (DFT) 计算对比的验证结果.
主要成果:
- 添加一个三体项显著改善了四面体间键角的调节.
- 三体术语对于准确预测Qn物种化至关重要.
- 使用三体术语的模拟结果与实验数据更好地一致.
结论:
- 三体术语对于准确的酸盐玻璃分子动力学建模至关重要.
- 这个术语大大增强了短距离和中距离结构和属性的描述.
- 改进的模型对于理解酸盐玻璃在应用中的行为至关重要.
相关概念视频
02:36Molecular Geometry and Dipole Moments
12.7K
The VSEPR theory can be used to determine the electron pair geometries and molecular structures as follows:
12.7K
02:27Predicting Molecular Geometry
34.1K
VSEPR Theory for Determination of Electron Pair Geometries
34.1K
02:35Noncovalent Attractions in Biomolecules
49.3K
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,...
49.3K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
41.7K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
41.7K
02:58Crystal Field Theory - Octahedral Complexes
26.2K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.2K
01:26Variables Affecting Phosphorescence and Fluorescence
491
Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
491