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関連する概念動画

Electron Configurations02:46

Electron Configurations

19.9K
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,...
19.9K
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

291
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
291
Electron Orbital Model01:18

Electron Orbital Model

69.0K
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...
69.0K
¹³C NMR: ¹H–¹³C Decoupling01:04

¹³C NMR: ¹H–¹³C Decoupling

1.2K
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
1.2K
The Aufbau Principle and Hund's Rule03:02

The Aufbau Principle and Hund's Rule

61.9K
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...
61.9K
π Molecular Orbitals of 1,3-Butadiene01:24

π Molecular Orbitals of 1,3-Butadiene

9.8K
Conjugated dienes have lower heats of hydrogenation than cumulated and isolated dienes, making them more stable. The enhanced stabilization of conjugated systems can be understood from their π molecular orbitals.
The simplest conjugated diene is 1,3-butadiene: a four-carbon system where each carbon is sp2-hybridized and has an unhybridized p orbital that contains an unpaired electron. According to molecular orbital theory, atomic orbitals combine to form molecular orbitals such that the number...
9.8K

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関連する実験動画

Updated: Sep 10, 2025

Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
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Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene

Published on: August 22, 2017

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単一のフルレンの軌道解析段階的な単一電子捕獲ダイナミクス

Zezhou Yang1, Boyu Wang2, Xinmiao Xie1

  • 1Beijing National Laboratory for Molecular Sciences, National Biomedical Imaging Center, College of Chemistry and Molecular Engineering, Peking University, 292 Chengfu Road, Haidian District, Beijing 100871, P. R. China.

Journal of the American Chemical Society
|August 21, 2025
PubMed
まとめ

研究者は単一のフルレン (C60) 分子による単一の電子の捕獲を正確に監視した. この研究は,異なる電荷状態を明らかにし,分子電子の電子の振る舞いを制御する振動と電気場の役割を強調しています.

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Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics
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Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics

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Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F&#8722;
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Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

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関連する実験動画

Last Updated: Sep 10, 2025

Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
08:44

Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene

Published on: August 22, 2017

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Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics
13:58

Probing C84-embedded Si Substrate Using Scanning Probe Microscopy and Molecular Dynamics

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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

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科学分野:

  • 材料科学
  • 量子化学について
  • 凝縮物質物理学

背景:

  • フラーレン (C60) は,独特のケージ状の構造と強い電子受容能力を有し,有機電子と太陽光発電の応用につながる.
  • スピントロニクスと量子技術の新興アプリケーションは,C60における電子の振る舞いの正確な制御の必要性を強調しています.
  • 個々のC60分子による複数の電子の捕獲を制御することは大きな課題です.

研究 の 目的:

  • 単一のC60分子の一連の単一の電子捕獲プロセスを正確に監視する.
  • C60における多電子捕獲の基本的メカニズムを調査する.
  • 先進的な電子と量子応用における C60 の可能性を探求する.

主な方法:

  • グラフェン電極間の単一のC60分子結合の製造.
  • 充電状態を検出するために,冷凍温度 (2K) でリアルタイムで電流を測定する.
  • 電子振動結合と電場効果を理解するための理論的計算.

主要な成果:

  • 特定のフロンティア軌道を持つ4つの異なる電荷状態 (0, 1, 2, 3電子を捕獲) を観測した.
  • 分子振動と電子の結合が多電子捕獲を促進することを示した.
  • 電子捕獲のダイナミクスを正確に制御する 重要な役割を示しました

結論:

  • 単一のC60分子におけるダイナミックで段階的な電子捕獲プロセスに関する洞察を提供した.
  • 分子電子と量子技術の C60 ベースの材料の潜在能力を確認しました
  • 単一分子装置における電子状態を正確に制御する方法を確立した.