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Related Concept Videos

Diamagnetism01:26

Diamagnetism

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.
Colors and Magnetism03:02

Colors and Magnetism

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 eye.
Valence Bond Theory02:42

Valence Bond Theory

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...
Ferromagnetism01:31

Ferromagnetism

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...
π Electron Effects on Chemical Shift: Overview01:27

π Electron Effects on Chemical Shift: Overview

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, resulting in...
Paramagnetism01:30

Paramagnetism

Paramagnets are materials with unpaired electrons that possess a finite magnetic moment. In the absence of a magnetic field, these moments are randomly oriented, and thus the net moment is zero. Under an external field, a torque acting on the moments tends to align them along the field's direction. However, the random thermal motion of electrons produces a torque opposite to the external field and tries to disorient the moments. These two competing effects align only a few moments along the...

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Related Experiment Video

Updated: May 12, 2026

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

Published on: June 9, 2023

A dysprosium alkylidene single molecule magnet.

Yin-Cong Kong1, Zi Yang1, Yi Liu1

  • 1School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, P. R. China. wangchen0@whut.edu.cn.

Dalton Transactions (Cambridge, England : 2003)
|May 11, 2026
PubMed
Summary

Researchers synthesized a novel dysprosium alkylidene complex, achieving the shortest Dy-C bond and demonstrating single-molecule magnet (SMM) properties. This highlights a promising strategy for developing advanced magnetic materials.

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Area of Science:

  • Organometallic Chemistry
  • Materials Science
  • Magnetism

Background:

  • Single-molecule magnets (SMMs) are crucial for developing advanced magnetic materials.
  • Dysprosium complexes are promising candidates for SMMs due to their magnetic properties.
  • Controlling the Dy-ligand bond is essential for optimizing SMM performance.

Purpose of the Study:

  • To synthesize and characterize a novel dysprosium alkylidene complex.
  • To investigate the magnetic properties and structure-property relationships of the complex.
  • To explore the role of the Dy-C bond in enhancing SMM behavior.

Main Methods:

  • Synthesis and characterization of a dysprosium alkylidene complex with a β-diketiminato ligand.
  • Magnetic measurements to determine SMM properties, including effective activation barrier (Ueff).
  • Ab initio calculations to analyze electronic structure, crystal-field effects, and magnetic anisotropy.

Main Results:

  • The synthesized complex exhibited the shortest reported Dy-C bond length (2.266(3) Å).
  • The complex demonstrated potent single-molecule magnet behavior with an effective activation barrier (Ueff) of 305 K.
  • Calculations revealed high crystal-field axiality and strong magnetic anisotropy, with relaxation occurring via excited states.

Conclusions:

  • The Dy-C bond significantly benefits the molecular magnetism of dysprosium alkylidene SMMs.
  • Creating dysprosium complexes with a Dy-ligand multiple bond is a viable strategy for achieving uniaxial magnetic anisotropy.
  • This research provides insights into designing high-performance dysprosium-based single-molecule magnets.