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

NMR Spectroscopy: Spin–Spin Coupling01:08

NMR Spectroscopy: Spin–Spin Coupling

3.9K
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...
3.9K
Spin–Spin Coupling: One-Bond Coupling01:17

Spin–Spin Coupling: One-Bond Coupling

1.6K
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,...
1.6K
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

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

2.0K
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...
2.0K
Spin–Spin Coupling Constant: Overview01:08

Spin–Spin Coupling Constant: Overview

1.7K
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...
1.7K
¹H NMR: Long-Range Coupling01:27

¹H NMR: Long-Range Coupling

2.9K
The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
2.9K
Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)01:22

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

1.7K
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...
1.7K

You might also read

Related Articles

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

Sort by
Same author

Self-Powered Smart Textiles for Accelerated Wound Healing through Band Alignment in Piezoelectric Heterojunctions.

ACS nano·2026
Same author

Methylation-regulated miR-374a-5p and miR-374b-5p suppress glycolysis and malignant progression of head and neck squamous cell carcinoma by targeting DEPDC1.

Frontiers in oncology·2026
Same author

A pH-responsive layered double hydroxide nanoradiosensitizer for bone metastasis tumor.

Materials today. Bio·2026
Same author

Integrated radiopathomics nomogram for predicting angiogenic microvascular patterns in NSCLC: a dual-center validation study.

Annals of medicine·2026
Same author

High-Accuracy Temporal Prediction via Experimental Quantum Reservoir Computing in Correlated Spins.

Physical review letters·2026
Same author

Nanoscale Icelike Water Layer on a Diamond Surface under Ambient Conditions.

Physical review letters·2026

Related Experiment Video

Updated: Apr 15, 2026

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
05:39

Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

Published on: August 2, 2019

10.5K

Nonlinear coupling between a nitrogen-vacancy-center ensemble and a superconducting qubit.

Qiong Chen, Jun Wen, W L Yang

    Optics Express
    |April 4, 2015
    PubMed
    Summary

    Researchers achieved enhanced nonlinear interaction between nitrogen-vacancy-center ensembles and superconducting qubits using circuit quantum electrodynamics. This method enables practical schemes for nitrogen-vacancy-center squeezing with current technology.

    More Related Videos

    Gradient Echo Quantum Memory in Warm Atomic Vapor
    10:00

    Gradient Echo Quantum Memory in Warm Atomic Vapor

    Published on: November 11, 2013

    13.3K
    Generation and Coherent Control of Pulsed Quantum Frequency Combs
    06:42

    Generation and Coherent Control of Pulsed Quantum Frequency Combs

    Published on: June 8, 2018

    9.8K

    Related Experiment Videos

    Last Updated: Apr 15, 2026

    Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform
    05:39

    Scalable Quantum Integrated Circuits on Superconducting Two-Dimensional Electron Gas Platform

    Published on: August 2, 2019

    10.5K
    Gradient Echo Quantum Memory in Warm Atomic Vapor
    10:00

    Gradient Echo Quantum Memory in Warm Atomic Vapor

    Published on: November 11, 2013

    13.3K
    Generation and Coherent Control of Pulsed Quantum Frequency Combs
    06:42

    Generation and Coherent Control of Pulsed Quantum Frequency Combs

    Published on: June 8, 2018

    9.8K

    Area of Science:

    • Quantum physics
    • Quantum computing
    • Solid-state physics

    Background:

    • Circuit quantum electrodynamics enables control over quantum systems.
    • Nitrogen-vacancy centers (NVE) and superconducting qubits are key quantum components.
    • Nonlinear interactions are crucial for advanced quantum operations.

    Purpose of the Study:

    • To achieve and enhance nonlinear interaction between NVE and superconducting charge qubits.
    • To explore the application of this nonlinear coupling for quantum state manipulation.
    • To demonstrate a practical scheme for NVE squeezing.

    Main Methods:

    • Utilizing a transmission line resonator to mediate photon exchange.
    • Leveraging second-order coupling between the resonator's magnetic field and the charge qubit.
    • Enhancing nonlinear coupling via the total spin number in the NVE.

    Main Results:

    • Successfully demonstrated nonlinear interaction between NVE and superconducting charge qubits.
    • Showcased significant enhancement of nonlinear coupling proportional to NVE spin number.
    • Proposed a practical scheme for NVE squeezing within current technological capabilities.

    Conclusions:

    • The study presents a viable method for enhanced nonlinear coupling in quantum systems.
    • The proposed NVE squeezing scheme is achievable with existing technology.
    • This work advances the development of quantum technologies and applications.