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関連する概念動画

Factors Affecting Solubility04:01

Factors Affecting Solubility

32.2K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
32.2K
Formation of Complex Ions03:45

Formation of Complex Ions

18.8K
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...
18.8K
Precipitation of Ions03:11

Precipitation of Ions

25.4K
Predicting Precipitation
The equation that describes the equilibrium between solid calcium carbonate and its solvated ions is:
25.4K
Precipitation and Co-precipitation01:17

Precipitation and Co-precipitation

4.8K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
4.8K
Extraction: Advanced Methods00:56

Extraction: Advanced Methods

1.3K
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...
1.3K
Gravimetry: Inorganic And Organic Precipitating Agents00:49

Gravimetry: Inorganic And Organic Precipitating Agents

5.9K
In gravimetry, the precipitant is chosen carefully to obtain a pure solid that can be easily filtered. Common inorganic precipitants can be used to determine several cations and anions. In some cases, the formation of the same precipitate can be used to determine the cation and the anion. For example, the reaction of barium and chromate ions to give barium chromate is used to determine both barium and chromate. However, precipitates such as hydroxides, oxalates, and metal ammonium phosphates...
5.9K

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関連する実験動画

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Synthesis and Characterization of Functionalized Metal-organic Frameworks
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Synthesis and Characterization of Functionalized Metal-organic Frameworks

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48.3K

C2炭化水素からCO2を捕獲するための調整可能な柔軟性を持つ多変性硫酸柱状金属アゾラートフレームワーク

Hanze Wang1, Weixiang Zuo1, Zhe Wang1

  • 1School of Physical Science and Technology, Shanghai Key Laboratory of High-Resolution Electron Microscopy, State Key Laboratory of Advanced Medical Materials and Devices, ShanghaiTech University, Shanghai, 201210, China.

Angewandte Chemie (International ed. in English)
|August 22, 2025
PubMed
まとめ

研究者は,強化されたガス分離のための多変量戦略を使用して,柔軟な金属アゾラートフレームワーク (MAF) を開発しました. このアプローチは,ガス混合物からエチレンとエタンのCO2の吸収と浄化を最適化します.

キーワード:
アルカンの浄化炭素を捕獲するダイナミックな突破メタル・オーガニック・フレーム構造的なロック

さらに関連する動画

Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange
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Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange

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Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture
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関連する実験動画

Last Updated: May 3, 2026

Synthesis and Characterization of Functionalized Metal-organic Frameworks
11:27

Synthesis and Characterization of Functionalized Metal-organic Frameworks

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48.3K
Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange
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Author Spotlight: Functionalizing Metal-Organic Frameworks: Advancements, Challenges, and the Power of Post-Synthetic Ligand Exchange

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Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture
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Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture

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科学分野:

  • 材料科学
  • 化学工学
  • ナノテクノロジー

背景:

  • メタルアゾラートフレームワーク (MAF) は,ガス分離のための有望な多孔性材料です.
  • 調節枠の柔軟性は,ガス吸収と選択性を最適化するために不可欠です.
  • 多変量合成 (MTV) 戦略は,MAF特性を体系的に制御するための経路を提供します.

研究 の 目的:

  • フレームワークの柔軟性とガス分離性能を調整するMTV戦略を用いて硫酸柱型MAFを合成する.
  • これらのMAFにおけるガス吸附と分離を制御する構造-特性関係を調査する.
  • CO2を軽炭化水素から分離し,特にエチレンを浄化する.

主な方法:

  • リンカー組成の異なる硫酸柱MAFのMTV合成
  • 吸収と選択性を評価するためのガス吸附実験 (CO2,C2H4,C2H6).
  • 現実世界での分離性能を評価する 画期的な実験
  • 構造分析 (例えば,X線微分) と相互作用エネルギー計算.

主要な成果:

  • 単調な硫酸塩柱のMAF,Zn2 ((daTz) 2SO4は,効率的なCO2,C2H4,およびC2H6の吸収のためのダイナミックな構造変化を示した.
  • 非対称なリンク器を組み込み,炭化水素に対するCO2の選択性を強化しました.
  • MTVのアプローチにより,精密な構造制御が可能になり,優れたCO2 / C2H6およびCO2 / C2H4の分離につながりました.
  • 特定のMAF組成は,エチレン浄化に17倍もの改善を達成しました.

結論:

  • MTV戦略は,MAFの柔軟性とガス分離性能の調整に有効です.
  • 構造のダイナミクスとリンク器の変更は,CO2捕獲と炭化水素分離の最適化に不可欠です.
  • これらの発見は,選択的なガス分離アプリケーションのための高度な多孔性の材料の設計のための洞察を提供します.