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

Colors and Magnetism03:02

Colors and Magnetism

11.7K
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...
11.7K
Valence Bond Theory02:42

Valence Bond Theory

8.6K
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...
8.6K
Metal-Ligand Bonds02:51

Metal-Ligand Bonds

20.8K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
20.8K
Crystal Field Theory - Tetrahedral and Square Planar Complexes02:46

Crystal Field Theory - Tetrahedral and Square Planar Complexes

42.5K
Tetrahedral Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
42.5K
Atomic Nuclei: Nuclear Magnetic Moment00:59

Atomic Nuclei: Nuclear Magnetic Moment

1.1K
All atomic nuclei are positively charged. When they have a nonzero spin, they behave like rotating charges. As a consequence of their charge and spin, these nuclei generate a magnetic field (B). This, in turn, gives rise to a magnetic moment (μ), which is randomly oriented in the absence of an external magnetic field. When an external magnetic field (B0) is applied, the magnetic moment vectors can align with the field or against it in 2 + 1 orientations. A hydrogen nucleus, which is just a...
1.1K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

26.5K
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
26.5K

You might also read

Related Articles

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

Sort by
Same author

Light-responsive spin-crossover iron(II) complexes with azo-pyridyl-benzimidazole ligands for molecular thin films.

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

Practical and scalable access to halogenated 1,4-thiazines through a domino Morin-rearrangement/halogenation of <i>N</i>,<i>S</i>-acetals and their arylation based on Suzuki-Miyaura coupling.

Organic & biomolecular chemistry·2026
Same author

Influence of Carboxylate Ligand Variation on Structure, Magnetic Exchange, and Magnetocaloric Performance in Hexanuclear Gd(III) Complexes.

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

Thermally and Light-Induced Spin-Crossover in Iron(III) Complexes with Benzophenone-Based Saltrien Ligands: Hysteresis, Two-Step Transitions, and the LIESST Effect.

Inorganic chemistry·2025
Same author

Thermal monomerization unlocks 3/2 ↔ 5/2 spin crossover in a kinetically trapped high-spin Fe(III) dimer.

Dalton transactions (Cambridge, England : 2003)·2025
Same author

Effect of the counter anion to slow magnetic relaxation of hexacoordinate Co(II) complexes.

Dalton transactions (Cambridge, England : 2003)·2025

Related Experiment Video

Updated: Jul 2, 2025

Single-molecule Manipulation of G-quadruplexes by Magnetic Tweezers
08:28

Single-molecule Manipulation of G-quadruplexes by Magnetic Tweezers

Published on: September 19, 2017

8.0K

A heptanuclear {Dy2Cu5} complex as a single-molecule magnet.

Romana Mičová1, Cyril Rajnák1, Ján Titiš1

  • 1Department of Chemistry, Faculty of Natural Sciences, University of Ss. Cyril and Methodius, 917 01 Trnava, Slovakia. cyril.rajnak@ucm.sk.

Dalton Transactions (Cambridge, England : 2003)
|February 21, 2024
PubMed
Summary

Researchers synthesized a novel dysprosium-copper complex with a {Dy2Cu5} core. This complex exhibits single-molecule magnet behavior, showing slow magnetic relaxation without an external magnetic field.

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

2.0K
Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells
10:23

Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells

Published on: December 13, 2016

10.0K

Related Experiment Videos

Last Updated: Jul 2, 2025

Single-molecule Manipulation of G-quadruplexes by Magnetic Tweezers
08:28

Single-molecule Manipulation of G-quadruplexes by Magnetic Tweezers

Published on: September 19, 2017

8.0K
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

2.0K
Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells
10:23

Synthesis of Cationized Magnetoferritin for Ultra-fast Magnetization of Cells

Published on: December 13, 2016

10.0K

Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Magnetism

Background:

  • Dysprosium (Dy) and Copper (Cu) complexes are investigated for their unique magnetic properties.
  • Single-molecule magnets (SMMs) are of interest for potential applications in high-density data storage and quantum computing.

Purpose of the Study:

  • To synthesize and characterize a novel complex featuring a {Dy2Cu5} core.
  • To investigate the structural and magnetic properties of this complex.
  • To determine if the complex exhibits SMM behavior.

Main Methods:

  • X-ray crystallography was used to determine the precise atomic arrangement.
  • Magnetic susceptibility measurements were performed to understand magnetic interactions.
  • Direct current (DC) and alternating current (AC) magnetic measurements were conducted to probe relaxation dynamics.

Main Results:

  • A complex with a {Dy2Cu5} core was successfully synthesized and structurally characterized.
  • Dy(III) ions were found to be 9-coordinated, while Cu(II) ions exhibited 4-, 5-, and 6-coordination.
  • Antiferromagnetic interactions were observed, leading to an irregular energy spectrum with a ground state J = 25/2.
  • The complex demonstrated slow magnetic relaxation in the absence of an applied magnetic field, confirming SMM behavior.

Conclusions:

  • The synthesized {Dy2Cu5} complex is a single-molecule magnet.
  • Its magnetic properties are governed by antiferromagnetic interactions and a specific energy spectrum.
  • The observed slow magnetic relaxation at zero field highlights its potential for future magnetic applications.