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相关概念视频

Ionic Crystal Structures02:42

Ionic Crystal Structures

Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

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 - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

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...

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相关实验视频

Updated: Jun 8, 2026

Synthesis of Zeolites Using the ADOR (Assembly-Disassembly-Organization-Reassembly) Route
08:26

Synthesis of Zeolites Using the ADOR (Assembly-Disassembly-Organization-Reassembly) Route

Published on: April 3, 2016

烯酸框架和烯石

Jennifer A Armstrong1, Mark T Weller

  • 1School of Chemistry, University of Southampton, Southampton SO17 1BJ, UK.

Journal of the American Chemical Society
|October 19, 2010
PubMed
概括
此摘要是机器生成的。

研究人员合成了新的框架基酸盐,包括新的焦岩结构和nabesite类似物. 这项工作扩大了对酸化学和潜在应用的理解.

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Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides
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Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides

Published on: July 14, 2015

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

Published on: September 5, 2014

相关实验视频

Last Updated: Jun 8, 2026

Synthesis of Zeolites Using the ADOR (Assembly-Disassembly-Organization-Reassembly) Route
08:26

Synthesis of Zeolites Using the ADOR (Assembly-Disassembly-Organization-Reassembly) Route

Published on: April 3, 2016

Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides
10:27

Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides

Published on: July 14, 2015

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

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科学领域:

  • 材料科学 材料科学 材料科学
  • 矿物学是什么?矿物学是什么?
  • 晶体学 晶体学是指结晶学.

背景情况:

  • 自然存在的矿物质激发了新型合成材料的设计.
  • 石和相关框架酸盐具有独特的结构和化学特性.

研究的目的:

  • 以矿物结构为灵感,合成新的基酸盐框架.
  • 描述合成材料的结构化学,多孔性和热稳定性.

主要方法:

  • 烯酸酸盐的热水合成.
  • 使用X射线衍射和其他分析技术进行表征.
  • 分析四面体网络和框架拓.

主要成果:

  • 成功合成了两种新的焦石拓和一个分层的酸.
  • 第一次合成纳贝西特类别的基酸盐 (和衍生物).
  • 发现五角形开罗地板在一个新的热岩框架.

结论:

  • 这项研究扩大了已知的基酸框架的库.
  • 合成的材料表现出有趣的结构特征和应用潜力.
  • 了解框架拓是设计新材料的关键.