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

π Electron Effects on Chemical Shift: Overview01:27

π Electron Effects on Chemical Shift: Overview

1.6K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.6K
Colors and Magnetism03:02

Colors and Magnetism

13.9K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
13.9K
Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

1.4K
In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must...
1.4K
Ferromagnetism01:31

Ferromagnetism

2.9K
Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
2.9K
Thermal Electrocyclic Reactions: Stereochemistry01:17

Thermal Electrocyclic Reactions: Stereochemistry

2.5K
The stereochemistry of electrocyclic reactions is strongly influenced by the orbital symmetry of the polyene HOMO. Under thermal conditions, the reaction proceeds via the ground-state HOMO.
Selection Rules: Thermal Activation
Conjugated systems containing an even number of π-electron pairs undergo a conrotatory ring closure. For example, thermal electrocyclization of (2E,4E)-2,4-hexadiene, a conjugated diene containing two π-electron pairs, gives trans-3,4-dimethylcyclobutene.
2.5K
Stability of Substituted Cyclohexanes02:30

Stability of Substituted Cyclohexanes

14.6K
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...
14.6K

You might also read

Related Articles

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

Sort by
Same author

Ce(III) containing tricobalt-substituted silico-tungstate [CeCo<sub>3</sub>Si<sub>2</sub>W<sub>20</sub>O<sub>74</sub>(NO<sub>3</sub>)(OH)(H<sub>2</sub>O)]<sup>13-</sup>: a versatile nano-cluster with a multitude of applications.

Dalton transactions (Cambridge, England : 2003)·2026
Same author

How Much Chirality is Enough?

Chimia·2026
Same author

π-Radical Cascades to Peri-Fused Triangulene Dimers.

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

Double encapsulation of C<sub>60</sub>, [6]CPP and Li<sup>+</sup>@C<sub>60</sub> inside a peropyrene-linked, CPP-based double nanohoop.

Organic chemistry frontiers : an international journal of organic chemistry·2026
Same author

Strong Coupling in Orthogonal Nanographenes.

Chemistry (Weinheim an der Bergstrasse, Germany)·2026
Same author

Crystal structure and Hirshfeld surface analysis of 2,6-bis-[1-(prop-2-yn-1-yl)-1<i>H</i>-benzo[<i>d</i>]imidazol-2-yl]pyridine 0.144-hydrate.

Acta crystallographica. Section E, Crystallographic communications·2026

Related Experiment Video

Updated: Jan 9, 2026

Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene
08:25

Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene

Published on: July 3, 2015

12.0K

Cethrene's Catch-22: Is Trading Magnetism for Bistability Inevitable?

Pauline Pfister1, Daniel Čavlović1, Tamara Trajkovic1

  • 1Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland.

Organic Letters
|December 9, 2025
PubMed
Summary
This summary is machine-generated.

Cethrenes offer potential for organic magnetic photoswitches. Researchers are exploring solutions to a paradox where achieving magnetic properties may hinder bistability, a key requirement for photoswitch functionality.

More Related Videos

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
07:03

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Published on: August 15, 2018

9.2K
Fabrication Procedures and Birefringence Measurements for Designing Magnetically Responsive Lanthanide Ion Chelating Phospholipid Assemblies
09:38

Fabrication Procedures and Birefringence Measurements for Designing Magnetically Responsive Lanthanide Ion Chelating Phospholipid Assemblies

Published on: January 3, 2018

7.5K

Related Experiment Videos

Last Updated: Jan 9, 2026

Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene
08:25

Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene

Published on: July 3, 2015

12.0K
Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals
07:03

Measuring Magnetically-Tuned Ferroelectric Polarization in Liquid Crystals

Published on: August 15, 2018

9.2K
Fabrication Procedures and Birefringence Measurements for Designing Magnetically Responsive Lanthanide Ion Chelating Phospholipid Assemblies
09:38

Fabrication Procedures and Birefringence Measurements for Designing Magnetically Responsive Lanthanide Ion Chelating Phospholipid Assemblies

Published on: January 3, 2018

7.5K

Area of Science:

  • Organic chemistry
  • Materials science
  • Photochemistry

Background:

  • Cethrenes are a class of organic molecules with potential for magnetic photoswitch applications.
  • All-organic magnetic photoswitches require specific properties for functionality.

Purpose of the Study:

  • To investigate the feasibility of cethrenes as all-organic magnetic photoswitches.
  • To address the paradoxical requirements for achieving magnetic properties and bistability in cethrenes.

Main Methods:

  • Theoretical analysis of molecular properties.
  • Computational modeling of energy landscapes.
  • Exploration of structure-property relationships.

Main Results:

  • Fulfilling requirements for magnetic properties (thermally accessible triplet state, specific energy difference) appears to conflict with achieving high energy barriers for bistability.
  • A potential "Catch-22" situation exists where optimizing for magnetic switching may compromise the stability of the switch.

Conclusions:

  • Solving the "Catch-22" is crucial for realizing practical cethrene-based magnetic photoswitches.
  • Further research is needed to design cethrene derivatives that overcome these conflicting requirements.