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関連する概念動画

Formation of Complex Ions03:45

Formation of Complex Ions

A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
Colors and Magnetism03:02

Colors and Magnetism

Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
Aryldiazonium Salts to Azo Dyes: Diazo Coupling01:11

Aryldiazonium Salts to Azo Dyes: Diazo Coupling

The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para position.
Complexometric Titration: Overview00:39

Complexometric Titration: Overview

Complexometric titration involves the formation of a complex by reacting a metal ion with one or more ligands. A visual indicator often detects the end point of a complexometric titration. It is added to the metal solution before the titration, forming a stable metal–indicator complex and imparting color to the solution. As the titration approaches the equivalence point, the excess of the added ligand displaces the indicator from the metal–indicator complex, releasing the free indicator. The...
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...

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関連する実験動画

Updated: Jul 15, 2026

Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles
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Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles

Published on: March 2, 2016

Cu[Au][CN]2]2[DMSO]2:黄色のポリモルフで,バポクロミックな振る舞いを表している.

Julie Lefebvre1, Raymond J Batchelor, Daniel B Leznoff

  • 1Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, B.C., Canada, V5A 1S6.

Journal of the American Chemical Society
|December 9, 2004
PubMed
まとめ

銅-金協調ポリマーの2つのポリモルフは,構造が異なるにもかかわらず,同一の蒸気染色反応を示す. これらの材料は,可逆的に溶媒分子を交換し,センサーアプリケーションの可能性を実証しています.

科学分野:

  • マテリアルサイエンス 材料科学
  • 無機化学 無機化学とは
  • クリスタログラフィーです.

背景:

  • [Au(CN) 2) -単位に基づくコーディネーションポリマーは,構造的多様性および潜在的な応用により興味を惹きます.
  • ポリモルフィズム,つまり固体の物質が複数の形または結晶構造で存在する能力は,材料の特性に大きな影響を与える可能性があります.
  • 構造と性質の関係を理解することは,機能的な材料を設計する上で極めて重要です.

研究 の 目的:

  • 銅−[Au(CN) 2−ベースのコーディネーションポリマー,Cu[Au(CN) 2) 2 (DMSO) 2. 2の2つの異なるポリモルフを合成し,特徴づけました.
  • 特定されたポリモルフの構造的差異,磁気特性,熱安定性,および蒸気色の振る舞いを調査する.
  • 溶媒の交換能力と溶媒の組み込み時の構造的変化を調査する.

主な方法:

  • 単結晶X線 difraktionにより,2つのポリモルフの固体構造を決定する.
  • 溶剤の組み込みに関連した変化を分析するためのスペクトル検査技術 (UV-Vis,IR)
  • 熱安定性を評価するための熱重力測定分析.
  • 磁気結合を検出するための磁気感受性測定.

主要な成果:

さらに関連する動画

Luminophore Formation in Various Conformations of Bovine Serum Albumin by Binding of Gold(III)
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Luminophore Formation in Various Conformations of Bovine Serum Albumin by Binding of Gold(III)

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Synthesis and Characterization of Amphiphilic Gold Nanoparticles
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Synthesis and Characterization of Amphiphilic Gold Nanoparticles

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関連する実験動画

Last Updated: Jul 15, 2026

Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles
08:19

Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles

Published on: March 2, 2016

Luminophore Formation in Various Conformations of Bovine Serum Albumin by Binding of Gold(III)
08:26

Luminophore Formation in Various Conformations of Bovine Serum Albumin by Binding of Gold(III)

Published on: August 31, 2018

Synthesis and Characterization of Amphiphilic Gold Nanoparticles
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Synthesis and Characterization of Amphiphilic Gold Nanoparticles

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  • Cu[Au(CN) 2) 2の緑色 (1) と青色 (2) の2つのポリモルフは,異なるCu(II) 調整環境 (1の5座標,2の6座標) と次元 (1の1の2Dチェーン,2の2Dシート) を有する2つのポリモルフが特定されました.
  • 両ポリモルフは,オーロフィル相互作用によって3Dネットワークを形成し,同様の弱い反鉄磁気結合を示しているが,異なる熱分解温度を示している.
  • 構造的な違いにもかかわらず,両方のポリモルフは同一のバポクロミック特性を示し,溶媒交換時に同じCu[Au(CN) 2) 2 ((溶媒) x複合体に変換する.
  • 溶媒の分子はCu(II) センターに結合し,可視スペクトルと振動周波数 (nu(CN) を変化させ,室温で観察される可逆的な溶媒交換をします.

結論:

  • この研究では,銅-[Au(CN) 2) 基調整ポリマーの2つのポリモルフを成功裏に特定し,特徴づけました.
  • この発見は,固体構造が異なることが,金属の中心への溶媒結合によって引き起こされる,同様の蒸気色反応につながる可能性があることを強調しています.
  • Cu ((II) の柔軟な調整とネットワークを安定させるアオロフィリック相互作用は,可逆的なバポクロミズムを促進し,センシングアプリケーションの可能性を示唆しています.