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関連する概念動画

Stereoisomerism02:52

Stereoisomerism

13.8K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
13.8K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

30.4K
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...
30.4K
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

47.9K
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,...
47.9K
Properties of Enantiomers and Optical Activity02:24

Properties of Enantiomers and Optical Activity

21.0K
It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
21.0K
Hybridization of Atomic Orbitals II03:35

Hybridization of Atomic Orbitals II

47.5K
sp3d and sp3d 2 Hybridization
47.5K
Ionic Crystal Structures02:42

Ionic Crystal Structures

16.7K
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...
16.7K

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関連する実験動画

Updated: Jan 7, 2026

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids
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Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids

Published on: May 27, 2020

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二次元有機結晶における光ヘテロ構造

Kan Liao1,2, Junran Zhang1, Xiang-Long Yu3

  • 1State Key Laboratory of Flexible Electronics, School of Flexible Electronics (Future Technologies) & Institute of Advanced Materials, School of Physical and Mathematical Sciences, Nanjing Tech University, Nanjing, China.

Nature communications
|December 29, 2025
PubMed
まとめ

研究者らは、単一の有機ナノシート内に固有の光ヘテロ構造を作成しました。このブレークスルーにより、局在した固体状態遷移を介した蛍光増強が可能になり、先進的なフォトニックデバイスへの道が開かれます。

キーワード:
有機結晶光ヘテロ構造蛍光増強固体状態遷移フォトニックデバイス

さらに関連する動画

Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
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Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals

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Fabricating van der Waals Heterostructures with Precise Rotational Alignment
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Fabricating van der Waals Heterostructures with Precise Rotational Alignment

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関連する実験動画

Last Updated: Jan 7, 2026

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids
08:04

Excitonic Hamiltonians for Calculating Optical Absorption Spectra and Optoelectronic Properties of Molecular Aggregates and Solids

Published on: May 27, 2020

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Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
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Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals

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Fabricating van der Waals Heterostructures with Precise Rotational Alignment
09:25

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

10.0K

科学分野:

  • 材料科学
  • フォトニクス
  • 有機エレクトロニクス

背景:

  • 光ヘテロ構造は、次世代の集積フォトニクスにとって重要です。
  • 単一成分システムで不均一性を生成することは大きな課題です。
  • 既存の方法では、通常、異なる材料を接合します。

研究 の 目的:

  • 均一な有機ナノシートにおける固有の光ヘテロ構造を報告すること。
  • 空間的に不均一な光学特性の背後にあるメカニズムを調査すること。
  • 有機材料における光ヘテロ構造の新しいプラットフォームを確立すること。

主な方法:

  • 均一な有機ナノシートの作製。
  • マルチスケール構造および光学解析を用いた特性評価。
  • 根本的な相互作用を理解するための理論的モデリング。

主要な成果:

  • ナノシートの内側領域における蛍光増強を実証しました。
  • 中心上層における空間的に局在した固体状態遷移を特定しました。
  • この遷移が単結晶を面外双晶構造に変換し、放射効率を高めることを明らかにしました。

結論:

  • 固有の光ヘテロ構造のための単一成分システムを確立しました。
  • 観察された現象は、分子基板間および分子間相互作用の競合によって駆動されます。
  • 構造ダイナミクスによって制御される光現象および材料設計の探求への道を開きます。