Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Heterogeneous Catalysis01:22

Heterogeneous Catalysis

Heterogeneous catalysis involves a catalyst in a different phase from the reactants. It is a process where the catalyst and the reactants are in distinct phases, typically solid and gas or liquid.Most heterogeneous catalysts are metals, metal oxides, or acids. The list includes transition metals like iron (Fe), cobalt (Co), nickel (Ni), palladium (Pd), platinum (Pt), chromium (Cr), manganese (Mn), tungsten (W), silver (Ag), and copper (Cu). These metals possess partially vacant d orbitals that...
Catalysis02:50

Catalysis

The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
Catalysis01:27

Catalysis

Catalysis influences the rate of chemical reactions by providing an alternative reaction pathway with lower activation energy. A catalyst speeds up a reaction, but it is not consumed during the process. The fundamental principle of catalysis is the ability of a catalyst to alter the reaction mechanism, often introducing a more efficient pathway than the uncatalyzed process.In a catalyzed reaction, the catalyst participates directly in the reaction mechanism. It interacts with reactants to form...
Cooperative Allosteric Transitions01:58

Cooperative Allosteric Transitions

Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
Cooperative Allosteric Transitions01:58

Cooperative Allosteric Transitions

Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...
Cooperative Allosteric Transitions01:58

Cooperative Allosteric Transitions

Cooperative allosteric transitions can occur in multimeric proteins, where each subunit of the protein has its own ligand-binding site. When a ligand binds to any of these subunits, it triggers a conformational change that affects the binding sites in the other subunits; this can change the affinity of the other sites for their respective ligands. The ability of the protein to change the shape of its binding site is attributed to the presence of a mix of flexible and stable segments in the...

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

The Role of Structural Enthalpy in Spherical Nucleic Acid Hybridization.

Journal of the American Chemical Society·2018
Same author

The Weak-Link Approach to the Synthesis of Inorganic Macrocycles.

Angewandte Chemie (International ed. in English)·2018
Same author

Ligand Design for Electrochemically Controlling Stoichiometric and Catalytic Reactivity of Transition Metals.

Angewandte Chemie (International ed. in English)·2018
Same author

The Electrical Properties of Gold Nanoparticle Assemblies Linked by DNA.

Angewandte Chemie (International ed. in English)·2018
Same author

Directed Assembly of Periodic Materials from Protein and Oligonucleotide-Modified Nanoparticle Building Blocks.

Angewandte Chemie (International ed. in English)·2018
Same author

PLGA Spherical Nucleic Acids.

Advanced materials (Deerfield Beach, Fla.)·2018

相关实验视频

Updated: Jun 8, 2026

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes
12:08

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes

Published on: June 24, 2022

亚洛斯特超分子三层催化剂

Hyo Jae Yoon1, Junpei Kuwabara, Jun-Hyun Kim

  • 1Department of Chemistry and the International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208-3113, USA.

Science (New York, N.Y.)
|October 9, 2010
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种全性超分子复合物来控制有机金属催化剂. 这种可逆系统精确地打开和关闭催化活性,使得聚合物分子重量的调节.

更多相关视频

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
10:57

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
09:34

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly

Published on: February 6, 2020

相关实验视频

Last Updated: Jun 8, 2026

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes
12:08

Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes

Published on: June 24, 2022

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
10:57

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
09:34

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly

Published on: February 6, 2020

科学领域:

  • 超分子化学 超分子化学
  • 催化剂是一种催化剂.
  • 聚合物科学 聚合物科学

背景情况:

  • 有机金属催化剂提供了精确反应控制的潜力.
  • 整体调节提供了一个调节生物和化学系统的机制.
  • 开发具有可控制的催化活性的合成系统是一个关键的挑战.

研究的目的:

  • 为控制有机金属催化而设计和合成一个全超分子结构.
  • 通过小分子和离子来研究超分子复合体的可逆开关.
  • 为了证明这个系统在调节 ε-caprolactone 的环开放聚合物的应用.

主要方法:

  • 合成一个三层超分子复合体,封装一个单金属催化站点.
  • 使用小分子和元素离子 (例如,化物) 作为效应器来控制复杂的组装和拆卸.
  • 在聚合和效应器添加/删除过程中实时监测催化活性.
  • 聚合物分子重量和分散性的表征.

主要成果:

  • 一个超分子复合体成功地用埋藏的催化站点构建.
  • 该复合体证明了可逆的打开和关闭,由化物离子的存在或不存在控制.
  • ε-caprolactone的环开放聚合在复杂开放时被启动,在关闭时被灭.
  • 在多个开/关周期后,催化活性仍然很高,聚合物分子重量得到了有效调节.

结论:

  • 对有机金属催化剂的整体控制可以通过超分子结构来实现.
  • 这种可逆系统为催化过程提供了精确的时间和活动控制.
  • 开发的方法为调节聚合物合成和分子量提供了一个新的策略.