Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Chair Conformation of Cyclohexane02:02

Chair Conformation of Cyclohexane

14.6K
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...
14.6K
Conformations of Cyclohexane02:11

Conformations of Cyclohexane

12.5K
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...
12.5K
π Molecular Orbitals of 1,3-Butadiene01:24

π Molecular Orbitals of 1,3-Butadiene

8.9K
Conjugated dienes have lower heats of hydrogenation than cumulated and isolated dienes, making them more stable. The enhanced stabilization of conjugated systems can be understood from their π molecular orbitals.
The simplest conjugated diene is 1,3-butadiene: a four-carbon system where each carbon is sp2-hybridized and has an unhybridized p orbital that contains an unpaired electron. According to molecular orbital theory, atomic orbitals combine to form molecular orbitals such that the number...
8.9K
Stability of Substituted Cyclohexanes02:30

Stability of Substituted Cyclohexanes

12.6K
This lesson discusses the stability of substituted cyclohexanes with a focus on energies of various conformers and the effect of 1,3-diaxial interactions.
The two chair conformations of cyclohexanes undergo rapid interconversion at room temperature. Both forms have identical energies and stabilities, each comprising equal amounts of the equilibrium mixture. Replacing a hydrogen atom with a functional group makes the two conformations energetically non-equivalent.
For example, in...
12.6K
Stability of Conjugated Dienes01:28

Stability of Conjugated Dienes

3.4K
Introduction
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
3.4K
¹H NMR: Long-Range Coupling01:27

¹H NMR: Long-Range Coupling

1.7K
The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
1.7K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Naringin promotes angiogenesis in bone fracture healing via TAS2R39-Ca<sup>2+</sup>-autophagy axis.

Journal of translational medicine·2026
Same author

Estimates for sensory impairments requiring rehabilitation in China and globally: a comparative analysis of trends from 1990 to 2021 and future projections based on the GBD-WHO rehabilitation database 2021.

Journal of global health·2026
Same author

Structural Adaptability Driven by Nonuniform Ligand Torsion and Relocation Enables Microregulated Photothermal Conversion in a Coordination Framework.

ACS applied materials & interfaces·2026
Same author

Super-hydrophobic poly(L-lactic acid)/TiO<sub>2</sub> nanocomposite membrane with biomimetic microarchitectures for passive anti-icing via crystallization-driven assembly and breath figure strategy.

International journal of biological macromolecules·2026
Same author

Variation of active layer thickness and the driving factors in the permafrost region of the Daxing'anling Mountains, Northeast China.

Ying yong sheng tai xue bao = The journal of applied ecology·2026
Same author

WAT-to-BAT communication facilitates the sustained activation of BAT thermogenesis during cold exposure.

Cell discovery·2026

Related Experiment Video

Updated: Jun 28, 2025

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
07:45

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Published on: August 16, 2018

10.0K

Host-Host Interactions Enhanced the Structural Rigidity in a 6-Fold Interpenetrated Diamondoid Metal-Organic

Jia-Nuo Li1, Ding Chen1,2, Yunli Wang1

  • 1School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang 315211, China.

Inorganic Chemistry
|April 19, 2024
PubMed
Summary

Researchers developed a novel metal-organic framework (MOF) with enhanced rigidity for selective gas adsorption. This new material demonstrates superior performance in separating acetylene from ethylene, crucial for industrial applications.

More Related Videos

Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides
10:27

Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides

Published on: July 14, 2015

10.1K
Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs
08:25

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs

Published on: January 17, 2020

7.3K

Related Experiment Videos

Last Updated: Jun 28, 2025

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes
07:45

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Published on: August 16, 2018

10.0K
Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides
10:27

Preparation of Highly Porous Coordination Polymer Coatings on Macroporous Polymer Monoliths for Enhanced Enrichment of Phosphopeptides

Published on: July 14, 2015

10.1K
Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs
08:25

Development of Heterogeneous Enantioselective Catalysts using Chiral Metal-Organic Frameworks MOFs

Published on: January 17, 2020

7.3K

Area of Science:

  • Materials Science
  • Chemistry
  • Nanotechnology

Background:

  • Multi-interpenetrated metal-organic frameworks (MOFs) show promise in selective adsorption but are challenging to design and control.
  • Flexibility in MOFs can impact their performance in gas separation applications.

Purpose of the Study:

  • To design and synthesize a novel, rigid multi-interpenetrated MOF for enhanced gas separation.
  • To investigate the structural properties and stability of the new MOF.
  • To evaluate the MOF's performance in separating acetylene (C2H2) from ethylene (C2H4).

Main Methods:

  • Synthesis of a 3D 6-fold interpenetrated MOF (NBU-X1) using anthracene-based ligands (H2L1 and L2) and zinc ions.
  • Structural characterization using single-crystal X-ray diffraction and in situ variable-temperature powder X-ray diffraction.
  • Gas adsorption and separation performance evaluation using dynamic breakthrough tests.

Main Results:

  • A new MOF, NBU-X1, was successfully constructed with multiple C-H···π interactions contributing to structural rigidity.
  • The incorporation of anthracene rings created quasi-double pore windows, enhancing stability against heat and guest displacement.
  • NBU-X1 demonstrated excellent performance in purifying ethylene from acetylene/ethylene mixtures.

Conclusions:

  • The designed MOF, NBU-X1, exhibits enhanced structural rigidity and stability compared to typical flexible MOFs.
  • The unique pore structure and host-host interactions contribute to its selective adsorption capabilities.
  • This work provides a new strategy for developing robust MOFs for challenging gas separations.