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相关概念视频

Van der Waals Interactions01:24

Van der Waals Interactions

Atoms and molecules interact with each other through intermolecular forces. These electrostatic forces arise from attractive or repulsive interactions between particles with permanent, partial, or temporary charges. The intermolecular forces between neutral atoms and molecules are ion–dipole, dipole–dipole, and dispersion forces, collectively known as van der Waals forces.Polar molecules have a partial positive charge on one end and a partial negative charge on the other end of the molecule,...
Intermolecular Forces03:13

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...
Intermolecular Forces03:13

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...
Noncovalent Attractions in Biomolecules02:35

Noncovalent Attractions in Biomolecules

Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
Noncovalent Attractions in Biomolecules02:35

Noncovalent Attractions in Biomolecules

Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...

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相关实验视频

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Spatial Separation of Molecular Conformers and Clusters
10:37

Spatial Separation of Molecular Conformers and Clusters

Published on: January 9, 2014

基于可收缩凝的多点相互作用的可逆分子吸附.

T Oya1, T Enoki, A Y Grosberg

  • 1Department of Physics and Center for Materials Science and Engineering, Department of Chemistry, George R. Harrison Spectroscopy Laboratory, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. toyo@mit.edu

Science (New York, N.Y.)
|November 24, 1999
PubMed
概括

研究人员使用多点相互作用开发了聚合物凝用于分子捕获. 这些智能凝可以反向调整它们的结合强度,提供可调节的分子识别功能.

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Covalent Attachment of Single Molecules for AFM-based Force Spectroscopy

Published on: March 16, 2020

相关实验视频

Last Updated: Jul 13, 2026

Spatial Separation of Molecular Conformers and Clusters
10:37

Spatial Separation of Molecular Conformers and Clusters

Published on: January 9, 2014

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

Covalent Attachment of Single Molecules for AFM-based Force Spectroscopy
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科学领域:

  • 聚合物化学 聚合物化学
  • 材料科学 材料科学 材料科学
  • 分子识别分子识别

背景情况:

  • 开发用于选择性分子捕获的材料对于各种应用至关重要.
  • 现有的方法往往缺乏可调的亲和力或高效的捕获机制.

研究的目的:

  • 为设计聚合物凝具有针对目标分子可调的亲和力而创建一种通用方法.
  • 为了使聚合物凝和点分子之间的可逆,多点相互作用.

主要方法:

  • 合成聚合物凝,结合特定的单体,用于可逆的膨胀和收缩.
  • 纳入作为目标分子的多点吸附中心设计的少数单体.
  • 通过分析有关亲和力和单体度的功率定律,通过实验验证多点相互作用.

主要成果:

  • 展示了能够通过多点相互作用识别和捕获目标分子的聚合物凝的创建.
  • 在目标分子亲和力中实现可逆变化,超过一个数量级.
  • 通过观察到的权力与法律关系,证实了多点的相互作用.

结论:

  • 提出的方法为设计具有可调节分子识别特性的智能聚合物凝提供了一个多功能平台.
  • 这些凝显示出需要选择性和可逆捕获目标分子的应用的潜力.
  • 这些发现提供了对刺激响应的聚合物网络中结构属性关系的基本理解.