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

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
Electron Paramagnetic Resonance (EPR) Spectroscopy: Organic Radicals01:17

Electron Paramagnetic Resonance (EPR) Spectroscopy: Organic Radicals

Ideally, an unpaired electron shows a single peak in the EPR spectrum due to the transition between the two spin energy states. However, coupling interactions can occur between the spins of the unpaired electron and any neighboring spin-active nuclei. This hyperfine coupling results in hyperfine splitting, where the EPR signal is split into multiplets. The signals split into 2nI + 1 peaks, where n is the number of equivalent nuclei and I is the nuclear spin. These splitting patterns provide...
The Pauli Exclusion Principle03:06

The Pauli Exclusion Principle

The arrangement of electrons in the orbitals of an atom is called its electron configuration. We describe an electron configuration with a symbol that contains three pieces of information:
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...
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.
Hybridization of Atomic Orbitals I03:24

Hybridization of Atomic Orbitals I

The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...

You might also read

Related Articles

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

Sort by
Same author

Magnetic properties induced by the Yb-valence inhomogeneity in the layered Kondo-lattice compound Yb<sub>4</sub>RuGe<sub>8</sub>.

Journal of physics. Condensed matter : an Institute of Physics journal·2023
Same author

Cloning, subcellular localization and expression of CHL1, a subunit of magnesium-chelatase in soybean.

Biochemical and biophysical research communications·1995
Same author

[A resected case of focal nodular hyperplasia of the liver which could be diagnosed before operation].

Nihon Shokakibyo Gakkai zasshi = The Japanese journal of gastro-enterology·1995
Same author

Molecular characterization of fusion regulatory protein-1 (FRP-1) that induces multinucleated giant cell formation of monocytes and HIV gp160-mediated cell fusion. FRP-1 and 4F2/CD98 are identical molecules.

Journal of immunology (Baltimore, Md. : 1950)·1995
Same author

[Evaluation of early colorectal cancer with submucosal invasion based on histological architecture].

Nihon Shokakibyo Gakkai zasshi = The Japanese journal of gastro-enterology·1995
Same author

CT-defined large subcortical infarcts: correlation of location with site of cerebrovascular occlusive disease.

AJNR. American journal of neuroradiology·1995
Same journal

Corrigendum: Shells of charge: a density functional theory for charged hard spheres (2016<i>J. Phys. Condens. Matter</i><b>28</b>244006).

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same journal

Nuclear spin coherence properties of<sup>151</sup>Eu<sup>3+</sup>and<sup>153</sup>Eu<sup>3+</sup>in a Y<sub>2</sub>O<sub>3</sub>transparent ceramic.

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same journal

Corrigendum: The Hubbard dimer: a density functional case study of a many-body problem (2015<i>J. Phys.: Condens. Matter</i><b>27</b>393001).

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same journal

Antibonding-induced counterintuitive thermal transport behavior: A first-principles study of quaternary compounds BaCdXF(X=As,P,Sb).

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same journal

Topological properties of curved spacetime extended Su-Schrieffer-Heeger model.

Journal of physics. Condensed matter : an Institute of Physics journal·2026
Same journal

Influence of lattice expansion on Cr ferromagnetism in Ce<sub>(1-x)</sub>La<sub>(x)</sub>CrGe<sub>3</sub>compounds revealed by atomic-scale measurements.

Journal of physics. Condensed matter : an Institute of Physics journal·2026
See all related articles

Related Experiment Video

Updated: May 28, 2026

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

Possible spin singlet quadrumerization in Pb2Re2O(7-δ).

C Michioka1, Y Kataoka, H Ohta

  • 1Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan. michioka@kuchem.kyoto-u.ac.jp

Journal of Physics. Condensed Matter : an Institute of Physics Journal
|October 19, 2011
PubMed
Summary
This summary is machine-generated.

Researchers synthesized pyrochlore Pb(2)Re(2)O(6.75), revealing metallic conduction and a structural phase transition. This material may host an unconventional spin singlet state, forming spin quadrumers to resolve pyrochlore lattice frustration.

More Related Videos

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)
10:42

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)

Published on: December 29, 2016

Related Experiment Videos

Last Updated: May 28, 2026

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

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser
09:00

Experimental Methods for Spin- and Angle-Resolved Photoemission Spectroscopy Combined with Polarization-Variable Laser

Published on: June 28, 2018

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)
10:42

Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of Chalcogenidoplumbates(II or IV)

Published on: December 29, 2016

Area of Science:

  • Solid State Physics
  • Materials Science
  • Inorganic Chemistry

Background:

  • Pyrochlore oxides are a class of materials with diverse electronic and magnetic properties.
  • Understanding structure-property relationships in novel pyrochlores is crucial for materials design.
  • Spin frustration in pyrochlore lattices can lead to exotic ground states.

Purpose of the Study:

  • To synthesize a single crystal of pyrochlore Pb(2)Re(2)O(6.75) using hydrothermal methods.
  • To investigate the magnetic and transport properties of Pb(2)Re(2)O(6.75).
  • To explore the nature of the structural phase transition and its implications for electronic and magnetic behavior.

Main Methods:

  • Hydrothermal synthesis for single crystal preparation of Pb(2)Re(2)O(6.75).
  • Magnetic susceptibility measurements to probe magnetic ordering.
  • Electrical resistivity measurements to investigate transport properties.
  • Analysis of atomic displacement to characterize structural phase transitions.

Main Results:

  • Pb(2)Re(2)O(6.75) exhibits metallic conduction.
  • An anomalous second-order structural phase transition was observed at T(s)=294 K.
  • The transition involves changes in magnetization and structure, similar to Cd(2)Re(2)O(7) at 200 K.
  • A three-dimensional Ising-like order parameter suggests an unconventional spin singlet ground state.

Conclusions:

  • Pb(2)Re(2)O(6.75) is a metallic pyrochlore with a unique structural phase transition.
  • The observed phenomena suggest the formation of spin quadrumers to mitigate spin frustration.
  • This provides evidence for an unconventional spin singlet state in the ground state of Pb(2)Re(2)O(6.75).