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関連する概念動画

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...
Noncovalent Attractions in Biomolecules02:35

Noncovalent Attractions in Biomolecules

Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
Noncovalent Attractions in Biomolecules02:35

Noncovalent Attractions in Biomolecules

Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
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...
Complexation Equilibria: Overview01:23

Complexation Equilibria: Overview

Complexation reactions take place when dative or coordinate covalent bonds form between metal ions and ligands. The compounds formed in these reactions are called coordination compounds. The number of bonds formed between the metal ion and the ligands is called its coordination number. Generally, most metal ions in an aqueous solution are solvated by water molecules and thus exist as aqua complexes.
The equilibrium constant of the complexation reaction is represented as the formation constant...
Colloidal precipitates01:09

Colloidal precipitates

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...

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関連する実験動画

Updated: Jun 10, 2026

Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

超分子ナノアセンブリにおける非共性封じ込め安定性

Siriporn Jiwpanich1, Ja-Hyoung Ryu, Sean Bickerton

  • 1Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, USA.

Journal of the American Chemical Society
|August 5, 2010
PubMed
まとめ

私たちは,ナノアセンブリでゲスト分子がどれくらい速く交換されるかを測定するために,光法を開発しました. これは,薬物の配達車両の安定性と潜在的な漏れを評価するのに役立ちます.

科学分野:

  • 超分子化学とは
  • 材料科学は材料科学である.
  • バイオフィジックス 生物物理学

背景:

  • ナノアセンブリにおけるゲスト分子の交換ダイナミクスは,薬物投与器の安定性にとって極めて重要です.
  • 高い為替レートは,ナノキャリアが漏れやすい傾向を示し,薬物投与を危うくします.
  • これらのダイナミクスを理解することは,効果的で安定したナノキャリアを設計する鍵です.

研究 の 目的:

  • 水溶液中のゲスト交換ダイナミクスを評価するための新しい方法を開発し,提示する.
  • 様々なナノアセンブリ内のゲスト分子封じ込めの安定性を定量化するために.
  • 薬剤投与システムの完全性を評価するための信頼できるテクニックを確立する.

主な方法:

  • 核検出メカニズムとして,光共振エネルギー転送 (FRET) を利用しました.
  • リポフィルのゲスト分子の交換運動を監視するためにFRETを使用した.
  • ポリマーナノゲルとアンフィフィリックナノアセンブリにおける封じ込めの安定性を分析するために,この方法を適用した.

主要な成果:

  • ゲスト交換のダイナミクスを測定するためのFRETベースのアプローチを成功裏に実証しました.
  • 通貨レートを定量化し,封じ込めの安定性についての洞察を提供した.

さらに関連する動画

Directed Assembly of Elastin-like Proteins into defined Supramolecular Structures and Cargo Encapsulation In Vitro
10:01

Directed Assembly of Elastin-like Proteins into defined Supramolecular Structures and Cargo Encapsulation In Vitro

Published on: April 8, 2020

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
16:24

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

関連する実験動画

Last Updated: Jun 10, 2026

Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

Directed Assembly of Elastin-like Proteins into defined Supramolecular Structures and Cargo Encapsulation In Vitro
10:01

Directed Assembly of Elastin-like Proteins into defined Supramolecular Structures and Cargo Encapsulation In Vitro

Published on: April 8, 2020

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water
16:24

Controlling the Size, Shape and Stability of Supramolecular Polymers in Water

Published on: August 2, 2012

  • 異なるタイプのナノアセンブリにおける方法の適用性を検証した.

    • 結論:

    • FRETベースの方法は,水性ナノアセンブリにおけるゲスト交換ダイナミクスを評価するための強力なツールを提供します.
    • このテクニックは,薬物の配達車両の安定性と潜在的な漏れを評価するのに価値があります.
    • この発見は,薬物投与のためのより安定的かつ効率的なナノキャリアシステムの開発に寄与します.