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

π Electron Effects on Chemical Shift: Overview01:27

π Electron Effects on Chemical Shift: Overview

1.1K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.1K
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

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

1.1K
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...
1.1K
Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

1.0K
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,...
1.0K

You might also read

Related Articles

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

Sort by
Same author

Metallic Oxides and the Overlooked Role of Bandwidth.

Chemistry of materials : a publication of the American Chemical Society·2026
Same author

Activating Bismuth Nanosheets for Electrochemical CO<sub>2</sub> Reduction by Strain Engineering.

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

Nitrogen Engineered Carbon Paramagnetic Centers for Spin-Mediated Photocatalysis.

Journal of the American Chemical Society·2026
Same author

Size-dependent pyrolysis pathways of Co-triazolate MOFs tailor carbon-matrix morphology and catalytic site distribution.

Materials horizons·2026
Same author

Interlayer Slip Engineering Induces Unexpected Out-Of-Plane Piezoelectricity in Group-VA Nanosheets.

Small (Weinheim an der Bergstrasse, Germany)·2025
Same author

Strong, Yet Split Hydrogen Bonding with Ice Rules in Delafossite (H/D)RhO<sub>2</sub>.

Angewandte Chemie (International ed. in English)·2025

Related Experiment Video

Updated: Aug 15, 2025

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
10:57

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

18.3K

Electron Spin Catalysis with Graphene Belts.

Yulan Tian1, Huaqiang Cao1, Haijun Yang1

  • 1Department of Chemistry, Tsinghua University, Beijing, 100084, China.

Angewandte Chemie (International Ed. in English)
|January 8, 2023
PubMed
Summary
This summary is machine-generated.

Graphene belts act as efficient spin catalysts, utilizing radical species for reactions like oxygen reduction and organic synthesis. This novel approach demonstrates high performance and stability, opening new avenues in spin catalysis research.

Keywords:
Electron Spin ResonanceGraphene BeltsMechanismRadical Coupling ReactionSpin Catalysis

More Related Videos

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
11:42

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Published on: July 24, 2015

15.6K
Simultaneous Synthesis of Single-walled Carbon Nanotubes and Graphene in a Magnetically-enhanced Arc Plasma
09:48

Simultaneous Synthesis of Single-walled Carbon Nanotubes and Graphene in a Magnetically-enhanced Arc Plasma

Published on: February 2, 2012

15.4K

Related Experiment Videos

Last Updated: Aug 15, 2025

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
10:57

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction

Published on: April 10, 2018

18.3K
Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities
11:42

Fabrication of Gate-tunable Graphene Devices for Scanning Tunneling Microscopy Studies with Coulomb Impurities

Published on: July 24, 2015

15.6K
Simultaneous Synthesis of Single-walled Carbon Nanotubes and Graphene in a Magnetically-enhanced Arc Plasma
09:48

Simultaneous Synthesis of Single-walled Carbon Nanotubes and Graphene in a Magnetically-enhanced Arc Plasma

Published on: February 2, 2012

15.4K

Area of Science:

  • Materials Science
  • Catalysis
  • Physical Chemistry

Background:

  • Spin catalysis is an emerging field utilizing electron spin properties for chemical transformations.
  • Graphene-based materials offer unique electronic and structural properties for catalytic applications.

Purpose of the Study:

  • To investigate the spin catalysis mechanism of graphene belts synthesized via radical coupling.
  • To evaluate the performance of graphene belt spin catalysts in oxygen reduction reactions (ORR) and organic synthesis.

Main Methods:

  • Kinetic studies using electron spin resonance (ESR) spectroscopy.
  • Synthesis of graphene belts using a radical coupling method.
  • Electrochemical evaluation of catalytic activity and stability.

Main Results:

  • σ-type free radical species on graphene belts are identified as dominant catalytic sites via spin-spin interactions.
  • The graphene belt catalyst exhibits a high ORR half-wave potential (0.81 V) and exceptional long-term stability (>50,000 cycles).
  • Efficient benzylamine coupling to imine formation with ≈97.7% conversion and ≈97.9% yield was achieved.

Conclusions:

  • Graphene belts function as effective spin catalysts, driven by radical species and spin-spin interactions.
  • The demonstrated performance in ORR and organic synthesis highlights the broad applicability of this spin catalysis mechanism.
  • This research establishes a new direction for exploring aerobic processes within spin catalysis.