関連する実験動画
Updated: Jul 13, 2026

09:00
Cargo Loading onto Kinesin Powered Molecular Shuttles
Published on: November 3, 2010
ダイナミックなヴァン・デル・ワールズの協同組合を通じて,無孔の有機固体でのゲスト輸送
Jerry L Atwood1, Leonard J Barbour, Agoston Jerga
1Department of Chemistry, University of Missouri-Columbia, Columbia, MO 65211, USA. atwoodj@missouri.edu
まとめ
有機宿主化合物は,ゲストの吸収と放出のためにその構造を変形させることができます. 弱いヴァン・デル・ワールズの力は,これらの固体状態のダイナミクスを駆動し,結晶内の分子再配置を可能にします.
科学分野:
- 固体化学 固体化学
- 超分子化学とは
- クリスタログラフィーです.
背景:
- 有機宿主化合物は,単結晶から単結晶への相変化を示すことができる.
- これらの移行には,ゲスト分子の吸収と放出が含まれ,ホストの構造が変化します.
- ホスト材料は多孔性がないが,ゲストの移動を容易にする.
研究 の 目的:
- オーガニック結晶におけるゲスト誘発構造変化を誘発する分子メカニズムを調査する.
- 固体状態のダイナミクスを促進する分子間力の役割を理解する.
- 弱い分散力が結晶格子の再配置にどのように影響するかを示すために.
主な方法:
- 構造変化を監視するための単結晶X線 difraktion.
- ゲストとホストの相互作用の分析.
- 協力的な分子運動を理解するための計算モデリング.
主要な成果:
- オーガニックホストは,相変化の間にホスト分子の大幅な位置的および方向的再配置を経験します.
- 客の輸送は,多孔性の欠如にもかかわらず,容易に発生します.
- 弱いヴァン・デル・ワールスの相互作用は,格子変換の主なトリガーとして特定されています.
- 分子間の広範な協力性は,再配置中に結晶の整合性を維持するために不可欠です.
結論:
- 弱い分散力は,結晶性物質の固体状態のダイナミクスを大きく影響する.
- 協力的な分子再編成は,多孔性でない有機宿主におけるゲストの吸収と放出に不可欠である.
- 単結晶から単結晶への移行は,分子間相互作用と分子協力性の微妙なバランスによって支配されます.
関連する概念動画
Facilitated Transport
The chemical and physical properties of plasma membranes cause them to be selectively permeable. Since plasma membranes have both hydrophobic and hydrophilic regions, substances need to be able to transverse both regions. The hydrophobic area of membranes repels substances such as charged ions. Therefore, such substances need special membrane proteins to cross a membrane successfully. In facilitated transport, also known as facilitated diffusion, molecules and ions travel across a membrane via...
Facilitated Transport
The chemical and physical properties of plasma membranes cause them to be selectively permeable. Since plasma membranes have both hydrophobic and hydrophilic regions, substances need to be able to transverse both regions. The hydrophobic area of membranes repels substances such as charged ions. Therefore, such substances need special membrane proteins to cross a membrane successfully. In facilitated transport, also known as facilitated diffusion, molecules and ions travel across a membrane via...
Facilitated Transport
The chemical and physical properties of plasma membranes cause them to be selectively permeable. Since plasma membranes have both hydrophobic and hydrophilic regions, substances need to be able to transverse both regions. The hydrophobic area of membranes repels substances such as charged ions. Therefore, such substances need special membrane proteins to cross a membrane successfully. In facilitated transport, also known as facilitated diffusion, molecules and ions travel across a membrane via...
Carrier Transport
The generation of electrical current in semiconductors is fundamentally driven by two mechanisms: drift and diffusion. These processes are essential for the functionality and performance of semiconductor-based devices.
Drift Current:
The drift of charge carriers is started by an external electric field (E). Charged particles, such as electrons and holes, experience an acceleration between collisions with lattice atoms. For electrons, this results in a drift velocity (vd) given by:
Drift Current:
The drift of charge carriers is started by an external electric field (E). Charged particles, such as electrons and holes, experience an acceleration between collisions with lattice atoms. For electrons, this results in a drift velocity (vd) given by:
Carrier-Mediated Transport
Carrier-mediated transport is a pivotal process in drug absorption, particularly for lipid-insoluble drugs, and encompasses facilitated diffusion and active transport. Facilitated diffusion allows drugs to move along their concentration gradient without energy expenditure, while active transport utilizes ATP to drive drug movement against this gradient.
Active transport involves two types of membrane-spanning transporters: uptake and efflux. Uptake transporters are expressed in the small...
Active transport involves two types of membrane-spanning transporters: uptake and efflux. Uptake transporters are expressed in the small...
Site-Targeted Drug Delivery Systems: Polymeric Carriers
Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...

