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相关概念视频

Ligand Binding and Linkage00:49

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Allosteric proteins have more than one ligand binding site; the binding of a ligand to any of these sites influences the binding of ligands to the other sites. When a protein is allosteric, its binding sites are called coupled or linked.  In the case of enzymes, the site that binds to the substrate is known as the active site and the other site is known as the regulatory site. When a ligand binds to the regulatory site, this leads to conformational changes in the protein that can influence...
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A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
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Updated: May 24, 2025

In Situ SIMS and IR Spectroscopy of Well-defined Surfaces Prepared by Soft Landing of Mass-selected Ions
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在原子精确的白银集群组件中,链接器驱动的特定场所催化.

Priyanka Chandrashekar1, Arun Karmakar2, Ravari Kandy Aparna1

  • 1School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram Kerala 69551 India sukhendu@iisertvm.ac.in.

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概括
此摘要是机器生成的。

具有不同连接器的原子精确银 (Ag12) 纳米集群显示了可调节的催化活性,用于演化反应 (HER). 由于集群和链接器之间的协同效应,Ag12-pyrazine组件表现出卓越的性能.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 催化剂是一种催化剂.
  • 电化学 电化学 电化学

背景情况:

  • 金属纳米集群 (NCs) 提供了对催化机制的原子层次见解.
  • 构建具有分子理解的综合催化剂,特别是对于银 (Ag) 集群,仍然具有挑战性.

研究的目的:

  • 为了证明原子精确的Ag12集群组件作为进化反应 (HER) 的范式.
  • 调查集群核心和链接器功能单元如何微调催化活性.
  • 阐明这些组件中特定位点催化机制.

主要方法:

  • 合成和特征的Ag12集群组件与化物,化物,双化物, bis ((pyridyl) 乙,和阿佐化物连接器.
  • 电化学研究以评估演化反应 (HER) 活性.
  • 理论计算和结构分析以了解反应机制.

主要成果:

  • Ag12集群组件表现出基于链接器的可调节的HER催化活性.
  • Ag12-pyrazine (Ag12-pyz) 组件显示显著增强的催化活性和选择性吸附.
  • Ag12集群和pyrazine链接器之间的协同作用驱动了特定地点的催化.

结论:

  • 这项工作提供了一个结构模型,用于理解功能集群式组件中的催化剂活性位点和活动.
  • 这些发现推动了对HER的高效和选择性催化剂的开发.
  • 由于其独特的链接特性和集群间相互作用,Ag12-pyz作为高效的催化剂.