Jove
Visualize
お問い合わせ
JoVE
x logofacebook logolinkedin logoyoutube logo
JoVEについて
概要リーダーシップブログJoVEヘルプセンター
著者向け
出版プロセス編集委員会範囲と方針査読よくある質問投稿
図書館員向け
推薦の声購読アクセスリソース図書館諮問委員会よくある質問
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experimentsアーカイブ
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教員リソースセンター教員サイト
利用規約
プライバシーポリシー
ポリシー

関連する概念動画

Atomic Nuclei: Nuclear Spin01:08

Atomic Nuclei: Nuclear Spin

5.1K
All atomic particles possess an intrinsic angular momentum, or 'spin'. Electrons, protons, and neutrons each have a spin value of ½, although protons and neutrons in nuclei may have higher half-integer spins owing to energetic factors.
Atomic nuclei have a net nuclear spin, , which can have an integer or half-integer value. In atomic nuclei, the spins of protons are paired against each other but not with neutrons, and vice versa. Consequently, an even number of protons does not contribute...
5.1K
Atomic Nuclei: Nuclear Magnetic Moment00:59

Atomic Nuclei: Nuclear Magnetic Moment

3.0K
All atomic nuclei are positively charged. When they have a nonzero spin, they behave like rotating charges. As a consequence of their charge and spin, these nuclei generate a magnetic field (B). This, in turn, gives rise to a magnetic moment (μ), which is randomly oriented in the absence of an external magnetic field. When an external magnetic field (B0) is applied, the magnetic moment vectors can align with the field or against it in 2 + 1 orientations. A hydrogen nucleus, which is just a...
3.0K
Atomic Nuclei: Nuclear Spin State Population Distribution01:14

Atomic Nuclei: Nuclear Spin State Population Distribution

1.7K
Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
1.7K
NMR Spectroscopy: Spin–Spin Coupling01:08

NMR Spectroscopy: Spin–Spin Coupling

3.5K
The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment. This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei up to three bonds away; occasionally, even farther. This phenomenon is called spin–spin coupling or J-coupling. Coupling interactions are mutual and result in small changes in the absorption frequencies of both nuclei involved. While nuclei of the same element are involved...
3.5K
2D NMR: Overview of Homonuclear Correlation Techniques01:16

2D NMR: Overview of Homonuclear Correlation Techniques

811
Homonuclear correlation spectroscopy (COSY) is a powerful technique used in Nuclear Magnetic Resonance (NMR) spectroscopy to study the correlations between nuclei of the same type within a molecule. It provides information about scalar couplings between adjacent nuclei, which helps determine connectivity and structural information. There are several COSY variants, each with its unique strengths and experimental parameters.
COSY90 is the standard two-dimensional (2D) COSY experiment that...
811
2D NMR: Overview of Heteronuclear Correlation Techniques01:18

2D NMR: Overview of Heteronuclear Correlation Techniques

912
Heteronuclear correlation spectroscopy is an analytical technique that investigates the coupling between different types of nuclei, often a proton and an X-nucleus, such as carbon-13 or nitrogen-15. This method is commonly used in nuclear magnetic resonance (NMR) spectroscopy to gain insights into complex chemical compounds' structural and compositional aspects. A typical heteronuclear correlation spectrum displays X-nucleus chemical shifts on one axis and a proton spectrum on the other...
912

こちらも読む

関連記事

共著者、ジャーナル、引用グラフによってこの研究に関連する記事。

並び替え
Same author

Probing Li-ion conduction in glassy Li<sub>2</sub>S-P<sub>2</sub>S<sub>5</sub> electrolytes using NMR.

Solid state nuclear magnetic resonance·2026
Same author

Moving NMR infrastructures to remote access capabilities.

Progress in nuclear magnetic resonance spectroscopy·2026
Same author

Distinguishing Hydrogen Bonding in Structurally Similar Pharmaceutical Compounds With <sup>1</sup>H-<sup>14</sup>N HMQC MAS NMR at 100 kHz.

Magnetic resonance in chemistry : MRC·2026
Same author

Equivariant machine learning of electric field gradients-Predicting the quadrupolar coupling constant in the MAPbI3 phase transition.

The Journal of chemical physics·2025
Same author

Transforming solid-state nuclear magnetic resonance towards a chemistry-ready technique.

Solid state nuclear magnetic resonance·2025
Same author

Automated wide-line nuclear quadrupole resonance of mixed-cation lead-halide perovskites.

Magnetic resonance (Gottingen, Germany)·2025

関連する実験動画

Updated: May 6, 2026

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

9.3K

多重量子技術を用いた半整数四極核の同核相関実験で,魔法の角度P(4) で回転する.

T G Ajithkumar1, Arno P M Kentgens

  • 1Department of Physical Chemistry, NSRIM Center, University of Nijmegen, Toernooiveld 1, The Netherlands.

Journal of the American Chemical Society
|February 27, 2003
PubMed
まとめ

この研究は,修飾されたマジック・アングル・スピニング技術を使用して,半整数四極核の構造分析のための新しい方法を導入しています. このアプローチは,効率的なホモ核相関実験を可能にするために,四極の拡大を効果的に再焦点を当てました.

科学分野:

  • 固体核磁共振 (NMR) スペクトロスコーピー. 固体核磁共振 (NMR) スペクトロスコーピー. 固体核磁共振 (NMR) スペクトロスコーピー.
  • 材料科学と構造分析.

背景:

  • 半整数四極核は,重要な四極相互作用のために,構造的決定に課題を提示します.
  • 従来の固体NMR方法は,これらの核の複雑な構造情報を解明するのにしばしば苦労します.

研究 の 目的:

  • 半整数四極核から詳細な構造情報を得るために新しいNMRアプローチを開発し,実証する.
  • 二極相互作用を保持しながら四極の拡大に再焦点を当てることで,既存の技術の限界を克服する.

主な方法:

  • 2次元の複数の量子 (MQ) NMR実験の実施.
  • "P4 マジック・アングル"を使って,第4位のレジェンデール多項式が消える.
  • 多数量子/単一量子 (MQ-1Q) 相関スキームを用いて,二次四極の拡大を再フォーカスする.
  • 標準的なマジック・アングル・スピニング (MAS) 探査機にわずかな変更を加えた効率的な同核相関実験のための交換期間を組み込む.

主要な成果:

  • 提案された方法をモデル化合物で成功裏に実証した.
  • 二次四極拡大の効果的な再フォーカシング.
  • 構造的な洞察のための重要な二極相互作用情報の保持.

さらに関連する動画

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

9.8K
Isotopic Effect in Double Proton Transfer Process of Porphycene Investigated by Enhanced QM/MM Method
05:51

Isotopic Effect in Double Proton Transfer Process of Porphycene Investigated by Enhanced QM/MM Method

Published on: July 19, 2019

5.8K

関連する実験動画

Last Updated: May 6, 2026

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

9.3K
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

9.8K
Isotopic Effect in Double Proton Transfer Process of Porphycene Investigated by Enhanced QM/MM Method
05:51

Isotopic Effect in Double Proton Transfer Process of Porphycene Investigated by Enhanced QM/MM Method

Published on: July 19, 2019

5.8K
  • 修正されたパルススキームによって達成された効率的なホモ核相関.

    • 結論:

    • 開発されたNMRアプローチは,半整数四極核の構造的解明のための実行可能で効率的な戦略を提供します.
    • この技術は,複雑な材料の分析のための固体NMRの能力を強化します.
    • 標準的なMASプローブとのメソッドの互換性は,広範な適用可能性を示唆しています.