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

Ferromagnetism01:31

Ferromagnetism

3.2K
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...
3.2K
Valence Bond Theory02:42

Valence Bond Theory

11.4K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
11.4K
Colors and Magnetism03:02

Colors and Magnetism

14.2K
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...
14.2K
Radicals: Electronic Structure and Geometry01:07

Radicals: Electronic Structure and Geometry

5.2K
This lesson delves into the geometry of a radical, which is influenced by the electronic structure of the molecule. The principle is similar to that of a lone pair, where the unpaired electron influences the geometry at the radical center.
Accordingly, the structure of a trivalent radical lies between the geometries of carbocations and carbanions. An sp2-hybridized carbocation is trigonal planar, while an sp3-hybridized carbanion is trigonal pyramidal. Here, the difference in geometry is...
5.2K
Radical Reactivity: Overview01:11

Radical Reactivity: Overview

2.8K
Radicals, the highly reactive species, gain stability by undergoing three different reactions. The first reaction involves a radical-radical coupling, in which a radical combines with another radical, forming a spin‐paired molecule. The second reaction is between a radical and a spin‐paired molecule, generating a new radical and a new spin‐paired molecule. The third reaction is radical decomposition in a unimolecular reaction, forming a new radical and a spin‐paired...
2.8K
Diamagnetism01:26

Diamagnetism

3.1K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
3.1K

You might also read

Related Articles

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

Sort by
Same author

Thermally Activated Fluxionality Accelerates Nonradiative Decay in Titania Nanoclusters.

The journal of physical chemistry letters·2026
Same author

Aromaticity-Induced Spin State Switching and High-Spin States in Non-Alternant Polyradicals.

Journal of computational chemistry·2026
Same author

High-Spin Porphyrin Polyradicals.

ACS omega·2026
Same author

Computational insights into the structural and electronic properties of first-row transition metal-doped In<sub>2</sub>O<sub>3</sub> systems.

Physical chemistry chemical physics : PCCP·2026
Same author

Selective Hydrodemethylation of Methylalkylbenzenes on Potassium Hydride.

Angewandte Chemie (International ed. in English)·2025
Same author

Insight into the prospects and limitations of mechanochemically-synthesised lithium tetrahalogallates, LiGaX<sub>4</sub> (X = Cl, Br, I), as Li-ion conductors.

Chemical science·2025

Related Experiment Video

Updated: Feb 23, 2026

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units
09:35

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units

Published on: September 18, 2016

12.1K

Calix[n]arene-based polyradicals: enhancing ferromagnetism by avoiding edge effects.

Daniel Reta1, Ibério de P R Moreira2, Francesc Illas2

  • 1Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, C/Martí i Franquès 1, 08028 Barcelona, Spain and School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, UK. daniel.reta@manchester.ac.uk.

Physical Chemistry Chemical Physics : PCCP
|August 30, 2017
PubMed
Summary

Ring-like organic polyradicals, unlike linear ones, exhibit enhanced stability for high-spin states due to border absence. These structures show promise for developing high-spin single-molecule toroics.

More Related Videos

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
06:53

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

2.7K
Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
10:52

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex

Published on: July 27, 2022

3.4K

Related Experiment Videos

Last Updated: Feb 23, 2026

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units
09:35

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units

Published on: September 18, 2016

12.1K
Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks
06:53

Author Spotlight: Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

Published on: June 9, 2023

2.7K
Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex
10:52

Line Shape Analysis of Dynamic NMR Spectra for Characterizing Coordination Sphere Rearrangements at a Chiral Rhenium Polyhydride Complex

Published on: July 27, 2022

3.4K

Area of Science:

  • Organic chemistry
  • Materials science
  • Quantum physics

Background:

  • Organic polyradicals are crucial for studying spin topologies.
  • Customizable synthetic routes enable the creation of diverse polyradical systems.
  • Understanding factors influencing high-spin ground states is key for spintronic applications.

Purpose of the Study:

  • To investigate the impact of structural arrangement (linear vs. ring-like) on the stability of high-spin ground states in arylmethyl polyradicals.
  • To explore the role of borders in stabilizing spin topologies.
  • To identify potential candidates for advanced molecular magnetic materials.

Main Methods:

  • Synthesis of linear and ring-like arylmethyl polyradical derivatives.
  • Computational analysis of electronic structures and spin states.
  • Evaluation of structural flexibility and energy minima.

Main Results:

  • Ring-like polyradicals exhibit increased spin-alternation rule violations compared to linear counterparts, stabilizing the high-spin ground state.
  • Structural flexibility in ring systems leads to multiple energy minima, all maintaining a ferromagnetic ground state.
  • Absence of borders in ring structures is critical for enhanced spin state stability.

Conclusions:

  • Ring-like arylmethyl polyradicals offer superior stability for high-spin ground states.
  • These compounds are promising candidates for the development of high-spin single-molecule toroics.
  • The findings provide insights into designing molecular materials with tailored magnetic properties.