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: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

Coupling interactions are strongest between NMR-active nuclei bonded to each other, where spin information can be transmitted directly through the pair of bonding electrons. While nuclei polarize their electrons to the opposite spins, the bonding electron pair has opposite spins. Configurations with antiparallel nuclear spins are expected to be lower in energy. When coupling makes antiparallel states more favorable, J is considered to have a positive value. The one-bond coupling constant, 1J,...
Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

In bromoethane, the three methyl protons are coupled to the two methylene protons that are three bonds away. In accordance with the n+1 rule, the signal from the methyl protons is split into three peaks with 1:2:1 relative intensities. The methylene protons appear as a quartet, with the relative intensities of 1:3:3:1.
Qualitatively, any spin plus-half nucleus polarizes the spins of its electrons to the minus-half state. Consequently, the paired electron in the hydrogen–carbon bond must have a...
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...
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)01:22

Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)

Vicinal or three-bond coupling is commonly observed between protons attached to adjacent carbons. Here, nuclear spin information is primarily transferred via electron spin interactions between adjacent C‑H bond orbitals. This generally favors the antiparallel arrangement of spins, so 3J values are usually positive.
The extent of coupling depends on the C‑C bond length, the two H‑C‑C angles, any electron-withdrawing substituents, and the dihedral angle between the involved orbitals. The...
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...

You might also read

Related Articles

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

Sort by
Same author

Observation of magnon polarons in the van der Waals itinerant ferromagnet Fe<sub>3</sub>GeTe<sub>2</sub>.

Nature communications·2026
Same author

Electronic Signatures of the Multiple Moiré Components in the Two-Dimensional CrCl<sub>3</sub>/Au Heterostructure Observed by Scanning Tunneling Microscopy and Spectroscopy.

ACS nano·2026
Same author

Deposition of an Addressable Molecular Spin Qubit with Built-In Decoupling Structure.

Journal of the American Chemical Society·2026
Same author

Structurally robust quaterphenyl-dicarbonitrile 2D MOF nanopores on Cu(111) for cobalt spin-coordination motifs.

Nanoscale·2026
Same author

Gating Upconversion Electroluminescence in a Single Molecule via Adsorption-Induced Interaction of Unpaired Spin.

ACS nano·2026
Same author

Visualization of Defect-Induced Interband Proximity Effect at the Nanoscale.

Physical review letters·2026

Related Experiment Video

Updated: May 20, 2026

Assembly and Characterization of Biomolecular Memristors Consisting of Ion Channel-doped Lipid Membranes
08:07

Assembly and Characterization of Biomolecular Memristors Consisting of Ion Channel-doped Lipid Membranes

Published on: March 9, 2019

Robust spin crossover and memristance across a single molecule.

Toshio Miyamachi1, Manuel Gruber, Vincent Davesne

  • 1Karlsruhe Institute of Technology, Physikalisches Institut, Wolfgang-Gaede-Str. 1, 76131 Karlsruhe, Germany. toshio.miyamachi@kit.edu

Nature Communications
|July 5, 2012
PubMed
Summary

Researchers developed a nanoscale molecular switch using iron-based spin-crossover molecules. This switch can be controlled between high and low conduction states, paving the way for molecular spintronics.

More Related Videos

A Method for Growing Bio-memristors from Slime Mold
07:46

A Method for Growing Bio-memristors from Slime Mold

Published on: November 2, 2017

In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx
09:49

In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx

Published on: May 13, 2020

Related Experiment Videos

Last Updated: May 20, 2026

Assembly and Characterization of Biomolecular Memristors Consisting of Ion Channel-doped Lipid Membranes
08:07

Assembly and Characterization of Biomolecular Memristors Consisting of Ion Channel-doped Lipid Membranes

Published on: March 9, 2019

A Method for Growing Bio-memristors from Slime Mold
07:46

A Method for Growing Bio-memristors from Slime Mold

Published on: November 2, 2017

In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx
09:49

In Situ Transmission Electron Microscopy with Biasing and Fabrication of Asymmetric Crossbars Based on Mixed-Phased a-VOx

Published on: May 13, 2020

Area of Science:

  • Molecular electronics
  • Spintronics
  • Nanotechnology

Background:

  • Single-molecule switches are crucial for information storage.
  • Electrical detection of switching is established, but adding spin functionality is key for molecular spintronic devices.
  • Controlling spin states in single molecules is a significant challenge.

Purpose of the Study:

  • To demonstrate spin functionality in nanoscale molecular switches.
  • To achieve reproducible switching between distinct spin and conduction states at the single-molecule level.
  • To explore the potential of iron-based spin-crossover molecules for molecular spintronics.

Main Methods:

  • Utilized iron-based spin-crossover molecules.
  • Engineered individual molecules decoupled from a metallic substrate by a thin insulating layer.
  • Electrically detected the switching behavior between high-spin/high-conduction and low-spin/low-conduction states.

Main Results:

  • Successfully demonstrated individual and reproducible switching of iron-based spin-crossover molecules.
  • Achieved distinct high-spin, high-conduction and low-spin, low-conduction states.
  • Showed that decoupling the molecule from the substrate is essential for controlled switching.

Conclusions:

  • Iron-based spin-crossover molecules can function as nanoscale switches with combined spin and conduction control.
  • Decoupling molecules via an insulating layer enables reliable switching.
  • This work is a significant step towards realizing individual molecular spintronic devices.