毛穴のある塩の製造
Aeri J Gosselin1, Alexandra M Antonio1, Kyle J Korman1
1Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States.
Journal of the American Chemical Society
|September 9, 2021
まとめ
研究者達は 充電された調整ケージと 単純な反応を用いて 新しい多孔塩を作り出しました この方法により,調節可能な金属の識別,毛穴のサイズ,およびMOFのような材料の表面積を測定できます.
科学分野:
- 材料科学
- 超分子化学
- ナノテクノロジー
背景:
- メタル・オーガニック・フレームワーク (MOF) を含む多孔性材料は,ガス貯蔵や触媒などの用途に不可欠です.
- 調節可能な特性を有する新型の多孔性材料の開発は,材料科学における重要な課題です.
- 充電された調整ケージは,有秩序な多孔構造を構築するための有望な構成要素を提供します.
研究 の 目的:
- 充電コーディネーションケージを用いて新しい多孔塩のライブラリを合成する
- 合成された材料における金属の識別,毛穴の大きさ,表面積などの性質の調節性を調査する.
- 充電された分子前駆体に基づいた新しい多孔性の材料の合成のための設計原理を確立する.
主な方法:
- 単純な塩代謝反応による多孔塩の合成.
- メタル・オーガニック・フレームワーク (MOF) のような製品を沈殿するために,対照的に充電された調整ケージの溶液を混ぜる.
- 反応パラメータ (速度,ステキオメトリー) が粒子の大きさや製品の組成に及ぼす影響を調査する.
主要な成果:
- 充電コーディネーションケージを基に新しい多孔塩の大きなライブラリを合成しました.
- 金属の同一性,毛穴の大きさ,リガンドの機能群,および結果のMOFのような材料の表面積の高い調節性を実証した.
- 構成要素のケージは,その電荷に基づいて予測可能な比率で結合し,調整可能な粒子のサイズと組成を観察した.
結論:
- 塩の転移反応は,充電された調整ケージから新しい多孔性塩への汎用的で簡単な経路を提供します.
- 開発された設計原則は,多様な機能を持つ新しい多孔性材料の作成に広く適用されるものと期待されています.
- この研究は,様々な科学技術的な応用のための高度な多孔性の材料の設計と合成のためのツールキットを拡張します.
関連する概念動画
Ionic Strength: Effects on Chemical Equilibria
2.0K
The addition of an inert ionic compound increases the solubility of a sparingly soluble salt. For example, adding potassium nitrate to a saturated solution of calcium sulfate significantly enhances the solubility of calcium sulfate. Le Châtelier's principle cannot predict this shift in the equilibrium. Instead, this could be explained in terms of changes in the effective concentration of the ions in solution in the presence of added inert salt.
In this solution, the primary...
In this solution, the primary...
2.0K
Colloidal precipitates
1.2K
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...
1.2K
Precipitation Processes
947
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
947
Washing, Drying, and Ignition of Precipitates
1.6K
After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...
1.6K
Solubility Equilibria: Overview
1.0K
When a substance such as sodium chloride is added to water, it dissolves, forming an aqueous solution. The extent of dissolution is called solubility. The process of dissolution can exist in equilibrium, just like other chemical processes. Solubility equilibria are also called precipitation equilibria because the process of solubility can be reversible. The reverse of the solubility process is called precipitation.
Solubility is important in biological and environmental processes. A notable...
Solubility is important in biological and environmental processes. A notable...
1.0K
Precipitation Reactions
56.8K
In a precipitation reaction, aqueous solutions of soluble salts react to give an insoluble ionic compound – the precipitate. The reaction occurs when oppositely charged ions in solution overcome their attraction for water and bind to each other, forming a precipitate that separates out from the solution. Since such reactions involve the exchange of ions between ionic compounds in aqueous solution, they are also referred to as double displacement, double replacement, exchange reactions, or...
56.8K


