挫折した有機固体は,予期せぬガソリン吸収を示します
Praveen K Thallapally1, Scott J Dalgarno, Jerry L Atwood
1Department of Chemistry, University of Missouri, Columbia, Missouri 65211, USA.
Journal of the American Chemical Society
|November 23, 2006
まとめ
研究者らは,p-tert-butylcalix[5]arene.areneに新しい多孔性の結晶物質を発見した. この中間形は,急速なガス吸収を示し,従来の材料科学の理解に挑戦しています.
科学分野:
- マテリアルサイエンス 材料科学
- 超分子化学 超分子化学
- クリスタログラフィーです.
背景:
- カリキサレンは,多様な用途を持つマクロサイクル化合物です.
- 結晶の形とその性質を理解することは,材料設計において極めて重要です.
- 伝統的なガスソープション分析では,すべての活性物質の振る舞いを捉えることはできません.
研究 の 目的:
- p-tert-butylcalix[5]areneの非吸収ソルバートとデソルバート形態の間の結晶領域を調査するために.
- この中間結晶形のガス吸収特性を特徴づけるために.
- この形が新型の多孔性材料のクラスであるかどうかを判断する.
主な方法:
- ガス吸収の研究が行われました.
- 結晶構造の分析が行われました.
- 伝統的なガスソープションのトレンドと比較した.
主要な成果:
- ソルバートとデソルバート状態の間の"挫折型"と呼ばれる明確な結晶領域が特定されました.
- この挫折した形は,急速なガス吸収能力を発揮します.
- 中途半端な形は,これまで認識されていなかった,多孔性を示しています.
結論:
- p-tert-butylcalix[5]areneの挫折した結晶形は,多孔性である.
- この材料は,新種の多孔性材料を表しています.
- 結晶系におけるガス吸収の理解を広げています.
関連する概念動画
Adsorption of Gases on Solids
Adsorption is a process where molecules, known as the adsorbates, accumulate on a surface, which is referred to as the adsorbent or substrate. Occurring at the solid-gas interface, this phenomenon is crucial in various scientific and industrial contexts. The reverse of adsorption is desorption.Two types of adsorptions exist: physical (physisorption) and chemical (chemisorption). Physisorption involves gas molecules held to the solid's surface by relatively weak intermolecular van der Waals...
Gas Solubility
Gas solubility in liquids forms liquid-gas solutions, such as soft drinks, where carbon dioxide is dissolved in water, and the ocean, where the solubility of oxygen and carbon dioxide supports marine life. The ability of oceans to dissolve gases impacts weather conditions in the troposphere.However, gas-liquid interactions vary. For instance, hydrogen chloride gas is highly soluble in water, while oxygen's solubility is much lower. Because these solutions are non-ideal, Raoult’s law, which...
Adsorption Isotherms II
Brunauer, Emmett, and Teller (BET) introduced a theory in 1938 that modified Langmuir's assumptions to explain multilayer physical adsorption. This theory is applicable to Type II isotherms and provides a more realistic picture of adsorption processes. The BET theory assumes a uniform solid surface with localized adsorption sites, where adsorption at one site doesn't affect adsorption at neighboring sites. This theory also allows for the possibility of additional molecules being adsorbed on top...
Physical Properties Affecting Solubility
Solutions of Gases in Liquids
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
As for any solution, the solubility of a gas in a liquid is affected by the attractive intermolecular forces between solute and solvent species. Unlike solid and liquid solutes, however, there is no solute-solute intermolecular attraction to overcome when a gaseous solute dissolves in a liquid solvent since the atoms or molecules comprising a gas are far separated and experience negligible interactions. Consequently, solute-solvent interactions are the sole...
Solubility Equilibria: Overview
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...
Solubility
Solution, Solubility, and Solubility Equilibrium
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules, atoms, and/or ions)...
A solution is a homogeneous mixture composed of a solvent, the major component, and a solute, the minor component. The physical state of a solution—solid, liquid, or gas—is typically the same as that of the solvent. Solute concentrations are often described with qualitative terms such as dilute (of relatively low concentration) and concentrated (of relatively high concentration).
In a solution, the solute particles (molecules, atoms, and/or ions)...


