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

Chair Conformation of Cyclohexane02:02

Chair Conformation of Cyclohexane

14.7K
The chair conformation is the most stable form of cyclohexane due to the absence of angle and torsional strain. The absence of angle strain is a result of cyclohexane’s bond angle being very close to the ideal tetrahedral bond angle of 109.5° in its chair conformer. Similarly, the torsional strain is also absent owing to the perfectly staggered arrangement of bonds.
The hydrogen atoms linked to carbons are arranged in two different axial and equatorial orientations to achieve this...
14.7K
Conformations of Cyclohexane02:11

Conformations of Cyclohexane

12.6K
Cyclohexane does not exist in a planar form due to the high angle and torsional strain it would experience in the planar structure. Instead, it adopts non-planar chair and boat conformations.
The chair form is the most stable and derives its name from its resemblance to the “easy chair.” In the chair conformation, two carbon atoms are arranged out-of-plane — one above and one below, minimizing the torsional strain. In the chair form, the bond angle is very close to the ideal...
12.6K
Newman Projections02:06

Newman Projections

16.9K
Different notations are used to represent the three-dimensional structure of molecules on two-dimensional surfaces. One of the most commonly used representations is the dash-wedge formula. The dashed wedges, solid wedges, and the plane lines indicate the groups situated behind the plane, coming out of the plane, and in the plane, respectively.
The organic molecules rotate across the single bonds leading to numerous temporary three-dimensional structures of varying energy known as...
16.9K
Hybridization of Atomic Orbitals II03:35

Hybridization of Atomic Orbitals II

32.3K
sp3d and sp3d 2 Hybridization
32.3K
Hydrogen Bonds01:04

Hydrogen Bonds

8.6K
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...
8.6K
Carbon Skeletons01:12

Carbon Skeletons

107.7K
Life on Earth is carbon-based, as all macromolecules that make up living organisms contain carbon atoms. All organic compounds have a carbon backbone. Each carbon atom is tetravalent and can bond with four other atoms, making it an extraordinarily flexible component of biological molecules. Because carbon’s valence electrons are stable, it rarely becomes an ion. As the carbon chain increases in length, structural modifications such as ring structures, double bonds, and branching side...
107.7K

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 authorSame Topic

Negative linear compressibility of a one-dimensional interpenetrated metal-organic framework.

Chemical science·2026
Same author

RobInHood: a robotic chemist in a fume hood.

Digital discovery·2026
Same author

Structural modification of functionalized carbazoles: from Z' = 1 to Z' = 6.

Acta crystallographica Section B, Structural science, crystal engineering and materials·2026
Same author

Cyclo-Polyproline: Chameleonic All-Peptide Macrocycles With Induced-Fit Host-Guest Recognition.

Angewandte Chemie (International ed. in English)·2026
Same author

Chemist Eye: a visual language model-powered system for safety monitoring and robot decision-making in self-driving laboratories.

Digital discovery·2026
Same author

Low-Temperature and High-Pressure Phase Transitions in Two 2‑Amino-4'-halobenzophenones: Incommensurate Modulation and a Case of Temperature-Induced Twinning.

Crystal growth & design·2026

相关实验视频

Updated: Jul 13, 2025

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
08:42

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Published on: July 10, 2017

13.4K

使用柔性有机链架构的软有机链架构

Qiang Zhu1,2, Lei Wei3, Chengxi Zhao1,4

  • 1Department of Chemistry and Materials Innovation Factory, University of Liverpool, Liverpool L7 3NY, U.K.

Journal of the American Chemical Society
|October 12, 2023
PubMed
概括

研究人员开发了一种灵活的有机分子Cage-6-COOH,形成结有机框架 (HOF). 这种分子具有独特的结构转变和自我修复特性,

更多相关视频

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
07:14

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Published on: May 12, 2023

2.8K
Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes
09:09

Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes

Published on: December 15, 2015

9.4K

相关实验视频

Last Updated: Jul 13, 2025

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
08:42

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface

Published on: July 10, 2017

13.4K
Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers
07:14

Author Spotlight: Experimental Approaches for the Synthesis of Low-Valent Metal-Organic Frameworks from Multitopic Phosphine Linkers

Published on: May 12, 2023

2.8K
Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes
09:09

Layer-by-layer Synthesis and Transfer of Freestanding Conjugated Microporous Polymer Nanomembranes

Published on: December 15, 2015

9.4K

科学领域:

  • 材料科学
  • 超分子化学
  • 晶体学

背景情况:

  • 柔软的多孔晶体对刺激提供可调的反应,但在分子晶体中实现灵活性和多孔性是困难的.
  • 分子晶体中的弱分子相互作用往往限制结构稳定性和多孔性.

研究的目的:

  • 设计和合成具有链状运动的柔性有机分子,用于构建结有机框架 (HOF).
  • 研究由柔性所衍生的HOF的结构多样性和特性,重点是孔隙性和响应性.
  • 探索这些新型HOF的自我愈合和结构性记忆能力.

主要方法:

  • 一种灵活的氧桥式晶格式有机分子 (Cage-6-COOH) 的合成.
  • 在不同的条件下使用Cage-6-COOH形成有机框架.
  • 由此产生的HOF的结构特征,包括两个相互透的结构 (CageHOF-2α和CageHOF-2β),使用像X射线衍射这样的技术.
  • 孔隙性和表面积的评估 (例如,对CageHOF-2β进行BET分析).

主要成果:

  • 一个灵活的有机,Cage-6-COOH,由于其链式运动而具有67°二面角范围,已成功合成.
  • 形成了两个新的相互透的HOF,即CageHOF-2α (无孔) 和CageHOF-2β (有孔,表面积为458 m2/g).
  • 通过溶剂蒸汽处理,Cage-6-COOH很容易转化为这些HOF,在CageHOF-2β中表现出快速的自我愈合和选择性结构记忆.

结论:

  • 灵活的Cage-6-COOH分子可以构建具有可调的多孔性结构的HOF.
  • 固有的分子灵活性和非共价相互作用促进了显著的结构转变和自我愈合.
  • 这些发现突显了灵活的有机设计适应性和响应性的多孔材料的潜力.