Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Spin–Spin Coupling: One-Bond Coupling

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,...

¹H NMR: Interpreting Distorted and Overlapping Signals

¹H NMR: Interpreting Distorted and Overlapping Signals

Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are slanted or...

NMR Spectroscopy: Spin–Spin Coupling

NMR Spectroscopy: Spin–Spin Coupling

The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment. This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei up to three bonds away; occasionally, even farther. This phenomenon is called spin–spin coupling or J-coupling. Coupling interactions are mutual and result in small changes in the absorption frequencies of both nuclei involved. While nuclei of the same element are involved in...

Atomic Nuclei: Nuclear Spin State Overview

Atomic Nuclei: Nuclear Spin State Overview

NMR-active nuclei have energy levels called 'spin states' that are associated with the orientations of their nuclear magnetic moments. In the absence of a magnetic field, the nuclear magnetic moments are randomly oriented, and the spin states are degenerate. When an external magnetic field is applied, the spin states have only 2 + 1 orientations available to them. A proton with = ½ has two available orientations. Similarly, for a quadrupolar nucleus with a nuclear spin value of one, the...

Spin–Spin Coupling Constant: Overview

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...

You might also read

Related Articles

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

Sort by

Same author

Crystal structure of <i>catena</i>-poly[2-bromo-ethyl-ammonium [tin(II)-tri-μ-bromido]].

Acta crystallographica. Section E, Crystallographic communications·2026

Same author

Stepwise C-H bond activations and assembly of binuclear Ln<sup>3+</sup> species coordinated by a hexaanionic <i>anti</i>-η<sup>5</sup>:η<sup>5</sup>-dibenzopentalene-bridged bis(carbazolyl) framework.

Dalton transactions (Cambridge, England : 2003)·2026

Same author

Tuning single-molecule magnetism in Dy<sup>3+</sup> complexes <i>via</i> a tris(aryl)alkoxide ligand.

Dalton transactions (Cambridge, England : 2003)·2026

Same author

Fe(0)-catalyzed alkyne carboxylation with CO<sub>2</sub> involving spin crossover.

Chemical communications (Cambridge, England)·2026

Same author

4D-Printed Spin Crossover Metamaterials with Giant Programmable Positive or Negative Thermal Expansion.

Advanced materials (Deerfield Beach, Fla.)·2026

Same author

Conserved Kir channel mechanisms governing intrinsic excitability in human and rodent parvalbumin neurons.

Communications biology·2026

Search research articles

Related Experiment Video

Updated: May 29, 2026

Evaluating Plasmonic Transport in Current-carrying Silver Nanowires

Evaluating Plasmonic Transport in Current-carrying Silver Nanowires

Published on: December 11, 2013

Surface plasmons reveal spin crossover in nanometric layers.

Gautier Félix¹, Khaldoun Abdul-Kader, Tarik Mahfoud

¹LCC, CNRS, and Université de Toulouse (UPS, INP), 205 route de Narbonne, F-31077 Toulouse, France.

Journal of the American Chemical Society

|September 10, 2011

Summary

Investigating molecular spin crossover at the nanoscale is challenging. This study shows surface plasmon polaritons can detect spin-state changes in thin films with high sensitivity, even at the nanometer scale.

More Related Videos

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Published on: January 3, 2016

Fabrication of Periodic Gold Nanocup Arrays Using Colloidal Lithography

Fabrication of Periodic Gold Nanocup Arrays Using Colloidal Lithography

Published on: September 2, 2017

Related Experiment Videos

Last Updated: May 29, 2026

Evaluating Plasmonic Transport in Current-carrying Silver Nanowires

Evaluating Plasmonic Transport in Current-carrying Silver Nanowires

Published on: December 11, 2013

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

Published on: January 3, 2016

Fabrication of Periodic Gold Nanocup Arrays Using Colloidal Lithography

Fabrication of Periodic Gold Nanocup Arrays Using Colloidal Lithography

Published on: September 2, 2017

Area of Science:

Materials Science
Nanotechnology
Condensed Matter Physics

Background:

Molecular spin crossover (SCO) materials are of great interest for advanced applications.
Investigating SCO phenomena at reduced dimensions (nanoscale) presents significant challenges.
Existing methods struggle with sensitivity and resolution at the nanometer scale for SCO detection.

Purpose of the Study:

To demonstrate a novel method for detecting molecular spin-state changes at the nanoscale.
To leverage surface plasmon polariton waves for high-sensitivity SCO detection.
To overcome limitations in studying spin crossover in nano-objects and thin films.

Main Methods:

Utilizing surface plasmon polariton (SPP) waves propagating at a metal-dielectric interface.
Developing a detection scheme based on SPP interactions with SCO materials.
Investigating SCO phenomena in thin films and nano-objects at the nanometer scale.

Main Results:

SPP waves enable highly sensitive detection of spin-state transitions in dielectric layers.
The proposed method is effective even for SCO phenomena at the nanometer scale.
Demonstrated feasibility of using plasmonics for nanoscale SCO characterization.

Conclusions:

Surface plasmon polaritons offer a promising route for nanoscale spin crossover detection.
This technique enhances the study of spin crossover in reduced dimensions.
Opens new avenues for developing nanoscale SCO-based devices and sensors.