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関連する概念動画

Complexometric Titration: Ligands00:43

Complexometric Titration: Ligands

Different monodentate and polydentate ligands are used as complexing agents in complexometric titration reactions. The formation of complexes by mono- and bidentate ligands involves two or more intermediate steps, limiting their use as complexing agents. In comparison, polydentate ligands can form complexes with metal ions in a single-step process, facilitating sharper end points. This means polydentate ligands, such as amino carboxylic acid derivatives, are most commonly employed in...
Complexation Equilibria: The Chelate Effect01:19

Complexation Equilibria: The Chelate Effect

In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
¹H NMR: Complex Splitting01:13

¹H NMR: Complex Splitting

A proton M that is coupled to a proton X results in doublet signals for M. However, NMR-active nuclei can be simultaneously coupled to more than one nonequivalent nucleus. When M is coupled to a second proton A, such as in styrene oxide, each peak in the doublet is split into another doublet.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied first.
Complexation Equilibria: Factors Influencing Stability of Complexes01:09

Complexation Equilibria: Factors Influencing Stability of Complexes

In complexation reactions, metal cations are the electron pair acceptors, and the ligands are the electron pair donors. The stability of the metal complexes depends primarily on the complexing ability of the central metal ion and the nature of the ligands. Generally, the complexing ability of the metal ion depends on the size and charge of the ion. As the metal ion size increases, the stability of the metal complexes decreases, provided that the valency of the metal ion and the ligands remain...
The Equilibrium Binding Constant and Binding Strength02:18

The Equilibrium Binding Constant and Binding Strength

The equilibrium binding constant (Kb) quantifies the strength of a protein-ligand interaction. Kb can be calculated as follows when the reaction is at equilibrium:
2D NMR: Overview of Heteronuclear Correlation Techniques01:18

2D NMR: Overview of Heteronuclear Correlation Techniques

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 axis.

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関連する実験動画

Updated: Jul 5, 2026

Measuring Interactions of Globular and Filamentous Proteins by Nuclear Magnetic Resonance Spectroscopy (NMR) and Microscale Thermophoresis (MST)
10:28

Measuring Interactions of Globular and Filamentous Proteins by Nuclear Magnetic Resonance Spectroscopy (NMR) and Microscale Thermophoresis (MST)

Published on: November 2, 2018

分子複合と結合は,電泳性NMRスペクトロスコピーによって研究されました.

Fredrik Hallberg1, Christoph F Weise, Pavel V Yushmanov

  • 1Division of Physical Chemistry, Department of Chemistry, Royal Institute of Technology, SE-10044 Stockholm, Sweden.

Journal of the American Chemical Society
|May 27, 2008
PubMed
まとめ

エレクトロフォレティック核磁気共振 (NMR) は,分子複合体の組成とステキオメトリーに関する定量的な洞察を提供します. このテクニックは,充電された表面活性物質と充電されていないサイクロデクストリンの複合体を特徴付けます.

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Exploring Protein-Glycan Interactions: Advances in Nuclear Magnetic Resonance
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Exploring Protein-Glycan Interactions: Advances in Nuclear Magnetic Resonance

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Disentangling Glycan-Protein Interactions: Nuclear Magnetic Resonance (NMR) to the Rescue
07:40

Disentangling Glycan-Protein Interactions: Nuclear Magnetic Resonance (NMR) to the Rescue

Published on: May 17, 2024

関連する実験動画

Last Updated: Jul 5, 2026

Measuring Interactions of Globular and Filamentous Proteins by Nuclear Magnetic Resonance Spectroscopy (NMR) and Microscale Thermophoresis (MST)
10:28

Measuring Interactions of Globular and Filamentous Proteins by Nuclear Magnetic Resonance Spectroscopy (NMR) and Microscale Thermophoresis (MST)

Published on: November 2, 2018

Exploring Protein-Glycan Interactions: Advances in Nuclear Magnetic Resonance
10:07

Exploring Protein-Glycan Interactions: Advances in Nuclear Magnetic Resonance

Published on: August 26, 2025

Disentangling Glycan-Protein Interactions: Nuclear Magnetic Resonance (NMR) to the Rescue
07:40

Disentangling Glycan-Protein Interactions: Nuclear Magnetic Resonance (NMR) to the Rescue

Published on: May 17, 2024

科学分野:

  • アナリティカル・ケミストリー (Analytical Chemistry) とは
  • 超分子化学 超分子化学
  • 物理化学 物理化学

背景:

  • 分子複合体の特徴化は,様々な科学分野において極めて重要です.
  • エレクトロフォレティックテクニックは,分子相互作用を分析するための方法を提供します.
  • 核磁共振 (NMR) は,構造的解明のための強力なツールです.

研究 の 目的:

  • 分子複合体の定量的な特徴化のための電泳性NMRの有用性を実証する.
  • サイクロデクストリンと表面活性物質の間に形成される複合体の組成とステキオメトリーを調査する.
  • 無電荷の宿主分子と有電荷のゲスト分子を含むシステムを分析する方法を確立する.

主な方法:

  • 電気誘発性NMRを用いて,分子的に選択的な電気誘発的運動性を得ること.
  • 充電されていないサイクロデクストリンと充電された表面活性物質の間の複合体の形成.
  • 複合的な特性を決定するために,電泳性移動性のデータの定量分析.

主要な成果:

  • エレクトロフォレティックNMRは,分子複合体の定量的な特徴を成功裏に提供しました.
  • この方法は,サイクロデクストリン-表面活性物質複合体の組成とステキオメトリーを正確に決定しました.
  • 充電されていないサイクロデクストリンは,充電された表面活性物質と複合すると,電泳性の運動性を獲得することが示されました.

結論:

  • エレクトロフォレティックNMRは,分子複合組成とステキオメトリーの定量分析のための貴重な技術です.
  • このアプローチは,中立のホストと有料のゲストを含む複合体を特徴付けるのに有効です.
  • この発見は,超分子化学と分析科学における電泳性NMRの可能性を強調しています.