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相关概念视频

Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

934
Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.
934
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

26.1K
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...
26.1K
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

20.5K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
20.5K
Valence Bond Theory02:42

Valence Bond Theory

8.4K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
8.4K
Metallic Solids02:37

Metallic Solids

18.2K
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....
18.2K

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相关实验视频

Updated: Jun 2, 2025

Synthesis and Characterization of Functionalized Metal-organic Frameworks
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Synthesis and Characterization of Functionalized Metal-organic Frameworks

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对于金属有机框架的可通用机器学习潜力

Yifei Yue1,2,3, Saad Aldin Mohamed2, N Duane Loh1,3,4

  • 1Graduate School for Integrative Sciences and Engineering Programme, National University of Singapore, Singapore119077, Singapore.

ACS nano
|January 15, 2025
PubMed
概括

研究人员为成千上万的基于的金属有机框架 (MOF) 开发了通用机器学习潜力 (MLP). 这大大降低了模拟MOF属性的计算成本,加速了材料发现.

关键词:
强力场的力量场.机器学习的潜力.金属-有机的框架.分子模拟,分子模拟.物理属性 物理属性

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Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
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相关实验视频

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Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
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科学领域:

  • 计算化学计算化学
  • 材料科学 材料科学 材料科学
  • 机器学习 机器学习

背景情况:

  • 机器学习潜能 (MLP) 提供了具有线性时间复杂性的"量子精确"分子模拟,超过了实证力场.
  • 从初始计算中为MLP生成训练数据仍然是昂贵的计算.
  • 为各种纳米孔金属有机框架 (MOFs) 开发通用MLP是一个尚未探索的领域.

研究的目的:

  • 调查创建适用于具有不同化学和几何特征的基于Zn的多种MOF的单一,通用MLP的可行性.
  • 为了减少与MOFs高通量选相关的计算负担.

主要方法:

  • 杆化数据效率等价的MLPs.
  • 使用密度函数理论 (DFT) 优化MOF结构策划了一个训练数据集.
  • 验证了MLP在化学多样化的测试集上预测力和能量的准确性.

主要成果:

  • 成功开发了近3000个基于Zn的MOF的一般MLP.
  • MLP可靠地预测大MOF样本的物理性质 (振动,热力学,机械).
  • 实现了对高通量选的计算成本的显著降低,使得以前无法访问的Zn-MOFs的调查成为可能.

结论:

  • 一个一般的MLP可以有效地为一组庞大而多样化的基于Zn的MOF开发.
  • 这种方法大大降低了计算成本,促进了新型MOF的加速发现.
  • 开发的数据集和代码是公开可用的,以帮助未来的复杂化学结构研究.