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関連する概念動画

Molecular and Ionic Solids02:54

Molecular and Ionic Solids

16.4K
Crystalline solids are divided into four types: molecular, ionic, metallic, and covalent network based on the type of constituent units and their interparticle interactions.
Molecular Solids
Molecular crystalline solids, such as ice, sucrose (table sugar), and iodine, are solids that are composed of neutral molecules as their constituent units. These molecules are held together by weak intermolecular forces such as London dispersion forces, dipole-dipole interactions, or hydrogen bonds, which...
16.4K
Intermolecular Forces in Solutions02:28

Intermolecular Forces in Solutions

30.5K
The formation of a solution is an example of a spontaneous process, a process that occurs under specified conditions without energy from some external source.
When the strengths of the intermolecular forces of attraction between solute and solvent species in a solution are no different than those present in the separated components, the solution is formed with no accompanying energy change. Such a solution is called an ideal solution. A mixture of ideal gases (or gases such as helium and argon,...
30.5K
Vapor Pressure Lowering03:28

Vapor Pressure Lowering

25.2K
The equilibrium vapor pressure of a liquid is the pressure exerted by its gaseous phase when vaporization and condensation are occurring at equal rates: Dissolving a nonvolatile substance in volatile liquid results in a lowering of the liquid’s vapor pressure. This phenomenon can be explained by considering the effect of added solute molecules on the liquid's vaporization and condensation processes. To vaporize, solvent molecules must be present at the surface of the solution. The...
25.2K
Le Chatelier's Principle: Changing Volume (Pressure)02:32

Le Chatelier's Principle: Changing Volume (Pressure)

31.9K
For gas-phase equilibria, changes in the concentrations of reactants and products can occur with altered volume and pressure. The partial pressure, P, of an ideal gas is proportional to its molar concentration, M.
31.9K
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
Chemical Shift: Internal References and Solvent Effects01:17

Chemical Shift: Internal References and Solvent Effects

1.5K
In an NMR sample, precise measurement of the absolute absorption frequencies of nuclei is difficult. A standard internal reference compound is added, and the frequency difference between the reference signal and sample signals is measured.
The internal reference compound generally used in NMR spectroscopy is tetramethylsilane (TMS). TMS is preferred because it is chemically inert, soluble in NMR solvents, and easily removable. Also, the highly shielded methyl protons in TMS yield an intense...
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関連する実験動画

Updated: May 2, 2026

Metal-silicate Partitioning at High Pressure and Temperature: Experimental Methods and a Protocol to Suppress Highly Siderophile Element Inclusions
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Metal-silicate Partitioning at High Pressure and Temperature: Experimental Methods and a Protocol to Suppress Highly Siderophile Element Inclusions

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溶媒によって誘発される内圧の変化 VOPO4·2H2Oとインターケレーション反応への影響

Jiahui Liu1, Yuan Liu2, Timothy Yoo2

  • 1Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States.

Journal of the American Chemical Society
|March 28, 2025
PubMed
まとめ

溶媒の選択は,伝統的な溶媒とゲストの相互作用ではなく,主体の内部圧力の変化によって反応速度と製品形成に影響を及ぼします.

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Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
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Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance

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Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
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Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films

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関連する実験動画

Last Updated: May 2, 2026

Metal-silicate Partitioning at High Pressure and Temperature: Experimental Methods and a Protocol to Suppress Highly Siderophile Element Inclusions
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Influence of Hybrid Perovskite Fabrication Methods on Film Formation, Electronic Structure, and Solar Cell Performance
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Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
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科学分野:

  • 材料科学
  • 電気化学
  • 固体化学

背景:

  • 層状のバナジウムリン酸二酸化物 (VOPO4·2H2O) は,インターケレーションのための潜在的な宿主物質である.
  • フェロセンは,インターケレーション研究のための一般的なゲスト分子です.
  • 溶媒がインターケレーション運動と製品選択性に与える影響は完全に理解されていません.

研究 の 目的:

  • VOPO4·2H2Oへのフェロセンのインターキャラ化に対する溶媒-宿主および溶媒-ゲストの相互作用の影響を調査する.
  • 異なる溶媒がインターケレーション率と結果の製品段階 (1 段階と 2 段階) にどのように影響するかを決定する.
  • インターケレーションプロセスを媒介する内部宿主圧の役割を探求する.

主な方法:

  • フェロセンのVOPO4·2H2Oへのインターケレーションは7つの非反応性溶剤で実施された.
  • インターケレーション動態と産物分布は,PXRDを用いて分析された.
  • 溶媒効果は,内部圧力 (Peff) と宿主における構造的変化を含む溶媒特性と相関していた.
  • 密度関数理論 (DFT) は,フェロセンの拡散に対する圧力効果をモデル化するために使用されました.

主要な成果:

  • 7つの溶媒のうち6つの溶媒でインターケレーションが起き,フェロセニウム製品1段階と2段階の混合物が生じた.
  • 反応速度と産物比は,溶剤のシリーズによって著しく変化した.
  • より速い運動はステージ1の製品に好み,より遅い運動はステージ2に好みだった.
  • 伝統的な溶媒-ゲスト性質は運動と相関しないが,溶媒によるホスト内圧の変化 (Peff) は相関する.
  • 溶媒はVOPO4·2H2Oの層間間隔を変化させ,Peffに影響を与えた.

結論:

  • 溶媒環境は,インターケレーションホスト内の有効圧力を変化させ,インターケレーション運動と製品選択に影響を与えます.
  • これらの溶媒による圧力変化は,典型的な溶媒-ゲストの相互作用を上回る重要な要因です.
  • 内部主体の圧力を理解し制御することは,層状の材料におけるインターケレーションプロセスを最適化するために不可欠です.