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関連する概念動画

Electron Configurations02:46

Electron Configurations

Electron configurations and orbital diagrams can be determined by applying the Aufbau principle (each added electron occupies the subshell of lowest energy available), Pauli exclusion principle (no two electrons can have the same set of four quantum numbers), and Hund’s rule of maximum multiplicity (whenever possible, electrons retain unpaired spins in degenerate orbitals).
The relative energies of the subshells determine the order in which atomic orbitals are filled (1s, 2s, 2p, 3s, 3p, 4s,...
The Aufbau Principle and Hund's Rule03:02

The Aufbau Principle and Hund's Rule

To determine the electron configuration for any particular atom, we can build the structures in the order of atomic numbers. Beginning with hydrogen, and continuing across the periods of the periodic table, we add one proton at a time to the nucleus and one electron to the proper subshell until we have described the electron configurations of all the elements. This procedure is called the aufbau principle, from the German word aufbau (“to build up”). Each added electron occupies the subshell of...
The Pauli Exclusion Principle03:06

The Pauli Exclusion Principle

The arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:
Electron Orbital Model01:18

Electron Orbital Model

Orbitals are the areas outside of the atomic nucleus where electrons are most likely to reside. They are characterized by different energy levels, shapes, and three-dimensional orientations. The location of electrons is described most generally by a shell or principal energy level, then by a subshell within each shell, and finally, by individual orbitals found within the subshells.
The first shell is closest to the nucleus, and it has only one subshell with a single spherical orbital called the...
Atomic Orbitals02:44

Atomic Orbitals

An atomic orbital represents the three-dimensional regions in an atom where an electron has the highest probability to reside. The radial distribution function indicates the total probability of finding an electron within the thin shell at a distance r from the nucleus. The atomic orbitals have distinct shapes which are determined by l, the angular momentum quantum number. The orbitals are often drawn with a boundary surface, enclosing densest regions of the cloud.
VSEPR Theory02:37

VSEPR Theory

Valence shell electron-pair repulsion theory (VSEPR theory) enables us to predict the molecular structure around a central atom from an examination of the number of bonds and lone electron pairs in its Lewis structure. The VSEPR model assumes that electron pairs in the valence shell of a central atom will adopt an arrangement that minimizes repulsions between these electron pairs by maximizing the distance between them. The electrons in the valence shell of a central atom form either bonding...

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Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F&#8722;
06:53

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

Published on: July 27, 2018

2次元におけるπ-電子結合

Rico Gutzler1, Dmitrii F Perepichka

  • 1Max Planck Institute for Solid State Research , Heisenbergstrasse 1, 70569 Stuttgart, Germany.

Journal of the American Chemical Society
|September 20, 2013
PubMed
まとめ
この要約は機械生成です。

二次元 (2D) ポリマーを合成することでπ結合が拡張され,一次元 (1D) ポリマーよりもバンドギャップが小さい新しい有機電子材料が生成されます. この研究は,高度な有機電子機器のための2Dポリマーバンドギャップエンジニアリングを調査しています.

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Finite Element Modelling of a Cellular Electric Microenvironment
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Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene

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関連する実験動画

Last Updated: May 7, 2026

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F&#8722;
06:53

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

Published on: July 27, 2018

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科学分野:

  • マテリアルサイエンス 材料科学
  • 有機化学 オーガニック・ケミストリー
  • 凝縮物質物理学 凝縮物質物理学

背景:

  • 有機電子機器は,π結合オリゴーマーやポリマーに依存しています.
  • 最近の進歩により,平面の二次元 (2D) ポリマーの合成が可能になりました.
  • オーガニック・マテリアルが次世代の電子機器に不可欠です.

研究 の 目的:

  • 1Dポリマーと比較した2Dポリマーの電子特性を調査する.
  • 2次元の π 結合の拡張が物質の性質にどのように影響するかを理解する.
  • 有機材料における新しいバンドギャップエンジニアリング戦略を探求する.

主な方法:

  • 密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.密度関数理論 (DFT) の計算.
  • 実験的に合成された2Dポリマーの計算モデリング.
  • 結合長,交叉結合,二面曲線を含む構造-性質関係の分析.

主要な成果:

  • π結合を第2次元に拡張すると,最も高い占有分子軌道と最も低い無占有分子軌道 (HOMO-LUMO) のギャップが減少します.
  • 1Dおよび2Dポリマー間のバンドギャップエンジニアリングの有意な違いは観察されています.
  • オリゴーマーサイズ,交叉結合,二面曲線は,電子帯域の隙間を決定的に影響する.

結論:

  • 2Dポリマーは,有機材料の電子特性を調整するための有望なプラットフォームを提供します.
  • この発見は,2Dバンドギャップエンジニアリングに関する根本的な洞察を提供します.
  • この研究は,カスタマイズされた光電子特性を持つ高度な有機電子材料の設計への道を開く.