関連する実験動画
Updated: Jul 17, 2026

10:37
Spatial Separation of Molecular Conformers and Clusters
Published on: January 9, 2014
高圧下での分子解離時に固体ヨウ素の調節された構造
Takemura Kenichi1, Sato Kyoko, Fujihisa Hiroshi
1Advanced Materials Laboratory, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan. takemura.kenichi@nims.go.jp
Nature
|June 27, 2003
まとめ
高圧は固体ヨウ素を単原子状態に変換する. 研究者は,この圧力誘発解離の間に,中間的,不均衡に調節された相を発見し,分子結晶の行動に関する新しい洞察を明らかにしました.
科学分野:
- 凝縮物質物理学 凝縮物質物理学
- マテリアルサイエンス 材料科学
- 高圧物理 高圧物理
背景:
- 固体ヨウ素は,極端な圧力下では分子解離を経験します.
- 以前の研究では,直接解離または中間分子相が示唆されていた.
- 分子結晶における圧力誘発の相変化を理解することは極めて重要です.
研究 の 目的:
- 固体ヨウ素の圧力誘発解離中の中間段階を調査する.
- この一時的な相の構造と性質を特徴づけるために.
- 圧力による解離の分子レベルのメカニズムを解明する.
主な方法:
- 準水静的粉末X線微分測定. 準水静的粉末X線微分測定. 準水静的粉末X線微分測定. 準水静的粉末X線微分測定. 準水静的粉末X線微分測定.
- 原子間距離と構造変調の分析.
- 既存のX線 difrractionとスペクトロスコピクデータとの比較.
主要な成果:
- ヨウ素解離中の中間段階の明らかな証拠.
- 中間段階は,不均衡に調節された構造を示します.
- この相における最も近い原子間距離は連続的に分布している (2.86-3.11 Å).
結論:
- 中間段階は,分子解離中の一時的な状態である.
- その不均衡な構造は,解離機構の洞察を提供します.
- その起源と安定性を理解するために,さらに温度に依存する研究が必要である.
関連する概念動画
Molecular Comparison of Gases, Liquids, and Solids
Particles in a solid are tightly packed together (fixed shape) and often arranged in a regular pattern; in a liquid, they are close together with no regular arrangement (no fixed shape); in a gas, they are far apart with no regular arrangement (no fixed shape). Particles in a solid vibrate about fixed positions (cannot flow) and do not generally move in relation to one another; in a liquid, they move past each other (can flow) but remain in essentially constant contact; in a gas, they move...
Intermolecular Forces
Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
Phase Transitions: Melting and Freezing
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
Mass Spectrometry: Molecular Fragmentation Overview
The ionization of a molecule into a molecular ion inside the mass spectrometer causes instability in the molecule's structure due to the loss of an electron. This eventually leads to the fragmentation or breaking of some bonds in the molecule. The fragmentation occurs predominantly at specific bonds to yield relatively stable fragments.
One type of fragmentation pattern is the cleavage of a single bond in the molecular ion. The cleavage leads to a radical and a cation. The cleavage can occur at...
One type of fragmentation pattern is the cleavage of a single bond in the molecular ion. The cleavage leads to a radical and a cation. The cleavage can occur at...
Disassembly of Intermediate Filaments
Intermediate filaments (IFs) do not undergo spontaneous disassembly. Enzymes, kinases, and phosphatases add and remove phosphates from specific sites to regulate their disassembly. The IF concentration in the cytoplasm also regulates the disassembly. If the concentration crosses a threshold, it activates the protein kinases in the vicinity, allowing the phosphorylation of IFs.
Keratin proteins, found at the cell periphery near cell junctions, undergo a cycle of assembly and disassembly. In Type...
Keratin proteins, found at the cell periphery near cell junctions, undergo a cycle of assembly and disassembly. In Type...
High-Performance Liquid Chromatography: Elution Process
In High-Performance Liquid Chromatography (HPLC), the elution process is critical to the separation of analytes and the quality of chromatographic results. Elution describes how compounds move through the column and separate based on their interactions with the mobile and stationary phases. This process determines the resolution, peak shape, and retention times in the chromatogram, which are essential for identifying and quantifying components in complex mixtures. Understanding the elution...

