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Metal-Ligand Bonds02:51

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid 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...
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...
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...
Properties of Organometallic Compounds01:23

Properties of Organometallic Compounds

Organometallic compounds are compounds that contain a carbon–metal bond. Carbon belongs to an organyl group like alkyl, aryl, allyl, or benzyl groups. The metal can be from Group I or Group II of the periodic table, a transition metal, or a semimetal.

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Updated: May 20, 2026

Synthesis of a Water-soluble Metal–Organic Complex Array
06:40

Synthesis of a Water-soluble Metal–Organic Complex Array

Published on: October 8, 2016

バイオアクティブポリマーメタロゾームは,ブロックコポリマー-金属複合による自己組み立てによる.

Kensuke Osada1, Horacio Cabral, Yuki Mochida

  • 1Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.

Journal of the American Chemical Society
|July 28, 2012
PubMed
まとめ

研究者らは,抗がん剤とブロックコポリマーを使用して,新しいポリマー金属体を開発しました. これらの自己組み立て構造は,効果的に腫瘍に薬を投与し,光成像を可能にし,多機能薬媒介として有望であることを示しています.

さらに関連する動画

Using Polystyrene-block-poly(acrylic acid)-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization
09:02

Using Polystyrene-block-poly(acrylic acid)-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization

Published on: July 9, 2015

Synthesis and Characterization of Self-Assembled Metal-Organic Framework Monolayers Using Polymer-Coated Particles
06:48

Synthesis and Characterization of Self-Assembled Metal-Organic Framework Monolayers Using Polymer-Coated Particles

Published on: June 14, 2024

関連する実験動画

Last Updated: May 20, 2026

Synthesis of a Water-soluble Metal–Organic Complex Array
06:40

Synthesis of a Water-soluble Metal–Organic Complex Array

Published on: October 8, 2016

Using Polystyrene-block-poly(acrylic acid)-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization
09:02

Using Polystyrene-block-poly(acrylic acid)-coated Metal Nanoparticles as Monomers for Their Homo- and Co-polymerization

Published on: July 9, 2015

Synthesis and Characterization of Self-Assembled Metal-Organic Framework Monolayers Using Polymer-Coated Particles
06:48

Synthesis and Characterization of Self-Assembled Metal-Organic Framework Monolayers Using Polymer-Coated Particles

Published on: June 14, 2024

科学分野:

  • バイオマテリアル科学 バイオマテリアル科学
  • ナノテクノロジー ナノテクノロジー
  • ポリマー化学のポリマー化学について

背景:

  • ポリメラルメタロゾームは,標的型薬剤投与の可能性を秘めています.
  • 薬剤の放出を制御した自己組み立てナノ構造の開発は,がん治療において極めて重要です.

研究 の 目的:

  • ポリマーメタルゾームの自発的形成を調査する.
  • 薬剤の投与と腫瘍画像の潜在能力を評価する.

主な方法:

  • (1,2-ダイアミノサイクロヘキサン) プラチナ (II) (DACHPt) がY形ブロックコポリマー (PEGasus-PLGA-Chole) と反応する.
  • 円形の二重化スペクトロスコーピーを用いた特徴化.
  • 薬剤投与と腫瘍イメージングのためのマウスでのin vivo研究.

主要な成果:

  • 均一な (~100 nm) ポリマースメタロゾームは,水中環境で自発的に形成された.
  • PLGAセグメントはα-ヘリックス構造を採用し,自己組み立てを膀構造に推進しました.
  • メタロソームはマクロモレキュルを成功裏に封じ込み,腫瘍に届け,抗腫瘍活性が実証された光成像を可能にしました.

結論:

  • セルフ・アセンブリされたポリマー・メタロゾームは,多機能薬媒体の可能性を示している.
  • このシステムは,抗がん剤と画像処理剤を標的として腫瘍に投与することを容易にする.
  • PLGAセグメントの二次構造形成は,自己組み立てプロセスにおいて重要な役割を果たします.