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

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
Valence Bond Theory02:42

Valence Bond Theory

11.1K
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...
11.1K
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

30.5K
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...
30.5K
Variables Affecting Phosphorescence and Fluorescence01:26

Variables Affecting Phosphorescence and Fluorescence

1.2K
Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
1.2K
Diamagnetic Shielding of Nuclei: Local Diamagnetic Current01:14

Diamagnetic Shielding of Nuclei: Local Diamagnetic Current

1.4K
An applied magnetic field causes the electrons present in the molecule to circulate, setting up a local diamagnetic current within the molecule. The local diamagnetic current arising from circulating sigma-bonding electrons induces a magnetic field, Blocal that opposes the applied magnetic field, B0. The effective magnetic field experienced by these nuclei is given by the difference between the applied and local magnetic fields in a phenomenon called local diamagnetic shielding. Essentially,...
1.4K

You might also read

Related Articles

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

Sort by
Same author

Electronic Structure Study of Rhombic Mn<sup>II</sup> Complexes with Hexadentate N<sub>4</sub>O<sub>2</sub> Chelate Ligands.

Inorganic chemistry·2026
Same author

Inverse-Sandwich Rare Earth Metal Complexes Comprising a Planar Toluene Dianion.

Inorganic chemistry·2026
Same author

Stabilization of the Benzene Radical Trianion in an Inverse-Sandwich Yttrium Complex.

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

Synthesis and Electronic Structure of a Tetraazanaphthalene Radical-Bridged Yttrium Complex.

ACS organic & inorganic Au·2025
Same author

A tetraazanaphthalene radical-bridged dysprosium single-molecule magnet with a large coercive field.

Chemical science·2025
Same author

A Neutral Dy(II) Bis(amide): Synthesis, Magnetism, and a P<sub>4</sub><sup>2-</sup> Complex.

Inorganic chemistry·2025

Related Experiment Video

Updated: Jan 9, 2026

Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
13:21

Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging

Published on: July 21, 2011

15.3K

Magnetic Blocking in Fluoflavine Radical-Bridged Dilanthanide Complexes.

Florian Benner1, Saroshan Deshapriya1, Jakub Hrubý2

  • 1Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, United States.

Journal of the American Chemical Society
|December 10, 2025
PubMed
Summary

Researchers developed new lanthanide (Ln) complexes with radical bridges, creating the first single-molecule magnets (SMMs) with radicals in distinct oxidation states. Complex 3-Dy shows record magnetic blocking temperatures for SMMs with organic radical bridges.

More Related Videos

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
Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells
08:31

Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells

Published on: September 16, 2014

12.5K

Related Experiment Videos

Last Updated: Jan 9, 2026

Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
13:21

Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging

Published on: July 21, 2011

15.3K
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
Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells
08:31

Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells

Published on: September 16, 2014

12.5K

Area of Science:

  • Coordination Chemistry
  • Materials Science
  • Magnetism

Background:

  • Fostering magnetic exchange coupling in lanthanide (Ln) complexes is challenging due to weak interactions via closed-shell ligands.
  • Open-shell ligands enhance coupling, leading to single-molecule magnets (SMMs) with potential for magnetic memory.
  • The effect of radical bridges in different oxidation states on magnetic blocking in Ln SMMs remains unexplored.

Purpose of the Study:

  • To synthesize and characterize novel dilanthanide complexes featuring fluoflavine (flv) radical bridges in distinct oxidation states.
  • To investigate the magnetic properties, particularly single-molecule magnet behavior, of these complexes.
  • To explore the influence of radical bridge oxidation states on magnetic blocking and SMM performance.

Main Methods:

  • Synthesis of dilanthanide complexes with fluoflavine bridges in z=1-•, z=2-, and z=3-• oxidation states.
  • Structural characterization using single-crystal X-ray diffraction (SCXRD).
  • Magnetic property measurements including SQUID magnetometry and high-field electron paramagnetic resonance (HF-EPR) spectroscopy.
  • Computational analysis using broken-symmetry density functional theory (BS-DFT).

Main Results:

  • First report of dilanthanide complexes with fluoflavine radical bridges in two distinct oxidation states (flv1-• and flv3-•).
  • Complexes 1-Dy and 3-Dy are the first SMMs incorporating radicals in differing oxidation states.
  • Complex 3-Dy exhibits a significantly enhanced spin-reversal barrier (Ueff = 143(2) cm-1) and record magnetic hysteresis up to 9.5 K for dilanthanide SMMs with organic radical bridges.
  • Complex 1-Dy shows a Ueff of 28.36 cm-1 with hysteresis below 3 K.

Conclusions:

  • The study demonstrates the successful synthesis of dilanthanide complexes with tunable radical bridges, enabling the creation of advanced SMMs.
  • The oxidation state of the radical bridge critically influences SMM performance, with the flv3-• bridge yielding superior magnetic blocking properties.
  • The enhanced performance in 3-Dy is attributed to spin-phonon coupling and optimized frontier orbital structure, paving the way for rational design of polynuclear Ln SMMs.