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Related Concept Videos

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...
Crystal Field Theory - Octahedral Complexes02:58

Crystal Field Theory - Octahedral Complexes

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...
Atomic Nuclei: Nuclear Magnetic Moment00:59

Atomic Nuclei: Nuclear Magnetic Moment

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Ionic Crystal Structures02:42

Ionic Crystal Structures

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Related Experiment Video

Updated: May 23, 2026

Stable Aqueous Suspensions of Manganese Ferrite Clusters with Tunable Nanoscale Dimension and Composition
10:45

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Published on: February 5, 2022

Magnetic structure variation in manganese-oxide clusters.

Kristen S Williams1, Joseph P Hooper, Jillian M Horn

  • 1Materials Science and Engineering Program, Texas A&M University, College Station, Texas 77843, USA.

The Journal of Chemical Physics
|April 10, 2012
PubMed
Summary
This summary is machine-generated.

Oxygen addition stabilizes low-spin magnetic structures in manganese oxide clusters (Mn(x)O(y)). Computational models must account for various magnetic arrangements (isomags) for accurate photoelectron spectroscopy predictions.

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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
08:55

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses

Published on: June 7, 2018

Area of Science:

  • Physical Chemistry
  • Computational Chemistry
  • Materials Science

Background:

  • Manganese oxide clusters (Mn(x)O(y)) exhibit complex magnetic properties.
  • Understanding their magnetic structure is crucial for materials design.

Purpose of the Study:

  • To investigate the magnetic structure variations in Mn(x)O(y) clusters.
  • To determine the influence of oxygen on magnetic ordering.
  • To correlate computational predictions with experimental spectroscopic data.

Main Methods:

  • Utilizing negative-ion photoelectron spectroscopy for experimental analysis.
  • Employing ab initio simulations for theoretical calculations.
  • Comparing energy differences between various magnetic isomers.

Main Results:

  • Ferrimagnetic and antiferromagnetic ground states are energetically favored over ferromagnetic states in Mn(x)O(y).
  • Oxygen incorporation stabilizes low-spin magnetic configurations compared to bare manganese clusters.
  • While clusters prefer a specific magnetic moment, non-degenerate isomers contribute spectral complexity.

Conclusions:

  • Oxygen plays a key role in dictating the magnetic ground state of Mn(x)O(y) clusters.
  • Accurate prediction of photoelectron spectra necessitates the inclusion of all relevant magnetic isomers.
  • This study provides insights into the fundamental magnetic behavior of transition metal oxide clusters.