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関連する概念動画

Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

49.4K
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,...
49.4K
Ionic Crystal Structures02:42

Ionic Crystal Structures

19.9K
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...
19.9K
Valence Bond Theory02:42

Valence Bond Theory

11.5K
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...
11.5K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

31.5K
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...
31.5K
Predicting Molecular Geometry02:27

Predicting Molecular Geometry

46.8K
VSEPR Theory for Determination of Electron Pair Geometries
46.8K
Properties of Transition Metals02:58

Properties of Transition Metals

30.6K
Transition metals are defined as those elements that have partially filled d orbitals. As shown in Figure 1, the d-block elements in groups 3–12 are transition elements. The f-block elements, also called inner transition metals (the lanthanides and actinides), also meet this criterion because the d orbital is partially occupied before the f orbitals.
30.6K

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関連する実験動画

Updated: Mar 16, 2026

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates

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水溶性ペンタゴナルプリズマチタンオクソクラスター

Guanyun Zhang1, Caiyun Liu1, De-Liang Long2

  • 1Key Lab for Colloid and Interface Science of Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University , Ji'Nan 250100, P. R. China.

Journal of the American Chemical Society
|August 16, 2016
PubMed
まとめ

研究者らは,独特の{Ti18O27}コアを持つ新しいチタンオクソクラスタを結晶化しました. これらの安定した溶解性クラスターは,表面改変と均質な光触媒の用途に希望を示しています.

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Synthesis of a Water-soluble Metal&#8211;Organic Complex Array
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Synthesis of a Water-soluble Metal–Organic Complex Array

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Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
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Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition

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関連する実験動画

Last Updated: Mar 16, 2026

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
06:35

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates

Published on: February 15, 2016

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Synthesis of a Water-soluble Metal&#8211;Organic Complex Array
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Synthesis of a Water-soluble Metal–Organic Complex Array

Published on: October 8, 2016

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Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
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科学分野:

  • 無機化学
  • 材料科学
  • ナノテクノロジー

背景:

  • 酸化チタンは,触媒と表面改変において極めて重要です.
  • 新材料の合成には 結晶化前クラスターの制御が不可欠です

研究 の 目的:

  • タイタニウムオクソクラスタの新家族を合成し,特徴づけること.
  • 表面改変と光触媒におけるこれらのクラスターの潜在的応用を探求する.

主な方法:

  • 核前クラスターの結晶化のための溶解性制御.
  • エレクトロスプレーイオン化質量スペクトロスコーピー (ESI-MS).
  • (17) 核磁共振 (NMR) と振動スペクトロスコーピー

主要な成果:

  • トリプルデッキの五角形のプリズマに配置された{Ti18O27}コアを持つチタン-オクソクラスターの成功合成.
  • 合成されたクラスターは,アセトニトリルや水などの様々な溶媒に良好な溶解性と安定性を示す.
  • タイタニウムオクソクラスターの独特の構造と特性を確認しました.

結論:

  • この研究は,チタン-オクソクラスターを合成するための新しい方法を示しています.
  • これらのクラスターは,表面改変と均質光触媒における先進的なアプリケーションの有望な候補です.
  • この発見は,機能的なチタンベースの材料の設計に新しい道を開きます.