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相关概念视频

Hydrogen Bonds01:04

Hydrogen Bonds

15.7K
A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...
15.7K
Hydrogen Bonds00:26

Hydrogen Bonds

135.9K
Hydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
135.9K
Chemical Bonds02:40

Chemical Bonds

23.7K

Atoms participate in a chemical bond formation to acquire a completed valence-shell electron configuration similar to that of the noble gas nearest to it in atomic number. Ionic, covalent, and metallic bonds are some of the important types of chemical bonds. Bond energy and bond length determine the strength of a chemical bond.
Types of Chemical Bonds
An ionic bond is formed due to electrostatic attraction between cations and anions. Often, the ions are formed by the transfer of electrons...
23.7K
Covalent Bonding and Lewis Structures02:46

Covalent Bonding and Lewis Structures

66.3K
Compared to ionic bonds, which results from the transfer of electrons between metallic and nonmetallic atoms, covalent bonds result from the mutual attraction of atoms for a “shared” pair of electrons.
66.3K
Radical Formation: Homolysis00:54

Radical Formation: Homolysis

4.6K
A bond is formed between two atoms by sharing two electrons. When this bond is broken by supplying sufficient energy, either two electrons can be taken up by one atom forming ions by the cleavage called heterolysis, or the two electrons are shared by two atoms, with one each creating radicals by the cleavage called homolysis.
4.6K
Hybridization of Atomic Orbitals II03:35

Hybridization of Atomic Orbitals II

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sp3d and sp3d 2 Hybridization
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相关实验视频

Updated: Mar 13, 2026

A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
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A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions

Published on: August 17, 2016

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为高性能能量化合物构建环间键.

Zihan Lin1, Xudong Xu1, Ning Ding1

  • 1School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.

Organic letters
|March 12, 2026
PubMed
概括
此摘要是机器生成的。

研究人员通过在单环结构中创建共振辅助键 (RAHB) 来开发出一种新的能量材料. 这种化合物具有高能量密度和爆炸性能,对机械刺激的敏感性降低.

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Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
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In Situ High Pressure Hydrogen Tribological Testing of Common Polymer Materials Used in the Hydrogen Delivery Infrastructure
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In Situ High Pressure Hydrogen Tribological Testing of Common Polymer Materials Used in the Hydrogen Delivery Infrastructure

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相关实验视频

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A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
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Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications
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In Situ High Pressure Hydrogen Tribological Testing of Common Polymer Materials Used in the Hydrogen Delivery Infrastructure
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科学领域:

  • 能量材料科学 能量材料科学
  • 有机化学 有机化学
  • 材料工程 材料工程 材料工程

背景情况:

  • 实现高能量密度和稳定性对于高能量的材料至关重要.
  • 响应辅助键 (RAHB) 是稳定分子的一个有希望的策略.
  • 由于其结构性质,单环化合物引起人们的兴趣.

研究的目的:

  • 合成一种新型的双循环能量材料,其中包含一个环间的RAHB.
  • 为了评估合成化合物的能量性能 (爆炸速度和压力).
  • 评估新能源材料的机械灵敏度.

主要方法:

  • 通过向分子设计合成双循环化合物5.
  • 在桥梁骨架内设计一个环间共振辅助的键.
  • 使用标准技术测量爆炸速度和压力.
  • 评估冲击灵敏度 (IS) 和摩擦灵敏度 (FS).

主要成果:

  • 成功合成了具有环间RAHB的化合物5.
  • 实现了9096米/秒的高爆炸速度.
  • 记录的爆炸压力为36.3 GPa.
  • 表现出低机械灵敏度,IS = 35 J和FS = 288 N. 显示出低机械灵敏度.

结论:

  • 设计的环间RAHB有效地提高了自行车能量材料的稳定性.
  • 化合物5显示出高能输出和低灵敏度的良好平衡.
  • 这项研究提出了一种可行的方法,用于设计更安全,高性能的能量材料.