新型金属有机框架材料的实验验证的Ab Initio晶体结构预测
Yizhi Xu1, Joseph M Marrett2, Hatem M Titi2
1Faculty of Chemistry, University of Warsaw; 1 Pasteura Street, Warsaw 02-093, Poland.
Journal of the American Chemical Society
|January 31, 2023
概括
第一原理的晶体结构预测成功发现了新的金属有机框架 (MOF). 这种计算方法加速了材料的发现和属性评估,绕过了传统的方法.
科学领域:
- 材料科学
- 计算化学
- 固态化学
背景情况:
- 第一原理晶体结构预测 (CSP) 是一种用于材料发现的强大计算工具.
- 传统的金属有机框架 (MOF) 设计依赖于几何学,直觉和实验选.
- 由于众多可能的网络拓,灵活的金属节点对传统的MOF设计构成挑战.
研究的目的:
- 引入CSP的第一个应用程序,用于发现新的金属有机框架 (MOF).
- 使用CSP探索具有灵活Cu (II) 节点的系统的相景.
- 为传统的MOF设计策略提供计算替代方案.
主要方法:
- 使用第一原理晶体结构预测 (CSP) 来探索相景.
- 对具有灵活 Cu (II) 节点的 MOF 计算了潜在的网络拓.
- 用实验合成预测的MOF结构进行验证.
主要成果:
- 使用CSP成功发现了新的MOF结构.
- 合成的材料符合预测的最低能量结构.
- 从预测结构中立即评估材料属性,例如燃烧能量.
结论:
- CSP是一个可行的和强大的方法来发现新的MOF,特别是那些具有灵活组件的MOF.
- 这种方法比传统的MOF设计技术有显著的进步.
- 通过快速结构预测和属性评估,CSP加速了材料发现管道.
相关概念视频
02:58Crystal Field Theory - Octahedral Complexes
27.1K
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...
27.1K
02:46Crystal Field Theory - Tetrahedral and Square Planar Complexes
43.6K
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,...
43.6K
02:37Metallic Solids
18.6K
Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
18.6K