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

UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

UV–Vis Spectroscopy: Molecular Electronic Transitions

3.6K
In Ultraviolet–Visible (UV–Vis) spectroscopy, the absorption of electromagnetic radiation is used to probe the electronic structure of molecules. This technique provides insights into molecular electronic transitions, particularly the movement of electrons between different molecular orbitals. Radiation is absorbed if the energy of the electromagnetic radiation passing through the molecule is precisely equal to the energy difference between the excited and ground states. During this...
3.6K
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)01:20

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

1.9K
When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
1.9K
Molecular Spectroscopy: Absorption and Emission01:14

Molecular Spectroscopy: Absorption and Emission

5.5K
Molecules possess discrete energy levels called quantum states. Unlike atoms, which have simpler energy levels, molecules possess additional rotational and vibrational energy levels. Each energy level is separated by an energy gap, with the gaps between adjacent electronic, vibrational, and rotational levels varying significantly. The three types of energy levels in a diatomic molecule are shown in Figure 1.
5.5K
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

866
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...
866
IR Absorption Frequency: Hybridization01:21

IR Absorption Frequency: Hybridization

1.7K
Hydrocarbons such as alkanes, alkenes, and alkynes show characteristic C–H stretching absorption bands. These IR stretching frequencies depend on the hybridization of the involved carbon atom and can be explained in terms of the s character of each hybridized atomic orbital.
Among the sp, sp2, and sp3 hybridized orbitals, sp orbitals have the maximum s character (50%). Consequently, the electrons are held more closely to the nucleus, resulting in stronger and shorter C–H bonds that...
1.7K
¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

1.8K
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...
1.8K

You might also read

Related Articles

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

Sort by
Same author

The Jahn-Teller Effect Meets Solvation: Additive Forces Behind Charge Localization in C<sub>3</sub>-Symmetric Donor-Acceptor Aggregates.

The journal of physical chemistry. B·2026
Same author

Jahn-Teller-driven electric field response in excited octupolar molecules.

The Journal of chemical physics·2025
Same author

Effect of the Locally Excited State on Symmetry-Breaking Charge Transfer and Transition Dipole Moment in Quadrupolar Molecules with Inverse Level Order.

The journal of physical chemistry. B·2025
Same author

Beyond the Stokes shift: Quantifying excited-state symmetry breaking effects in steady-state spectra of quadrupolar molecules.

The Journal of chemical physics·2025
Same author

The effect of acceptor-donor-acceptor molecule bending on the symmetry breaking charge transfer and transition dipole moment.

The Journal of chemical physics·2025
Same author

Electric dipole moment of excited octupolar molecules: Potential qubit implementation.

The Journal of chemical physics·2025

Related Experiment Video

Updated: Apr 16, 2026

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
10:52

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

10.4K

Terahertz second-harmonic generation by excited octupolar molecules.

Alexey E Nazarov1, Vyacheslav K Ignatjev1, Anatoly I Ivanov1

  • 1Volgograd State University, University Avenue 100, Volgograd 400062, Russia.

The Journal of Chemical Physics
|April 15, 2026
PubMed
Summary

We developed a theoretical model for octupolar molecules in terahertz fields. This model reveals unique rotational responses of molecular dipole moments, aiding in spectral analysis.

More Related Videos

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

9.1K
Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
08:22

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

Published on: August 6, 2018

7.5K

Related Experiment Videos

Last Updated: Apr 16, 2026

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
10:52

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

10.4K
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

9.1K
Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization
08:22

Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

Published on: August 6, 2018

7.5K

Area of Science:

  • Molecular Physics
  • Nonlinear Optics
  • Quantum Chemistry

Background:

  • Octupolar molecules exhibit complex responses to electromagnetic fields.
  • Understanding nonlinear terahertz (THz) response is crucial for molecular spectroscopy.
  • Vibronic interactions, like the Jahn-Teller effect, significantly influence molecular dynamics.

Purpose of the Study:

  • To develop a unified theoretical model for the nonlinear THz response of excited octupolar molecules.
  • To analyze the zeroth, first, and second harmonics of the induced molecular dipole moment.
  • To investigate the influence of vibronic interactions and dipole-field interactions on molecular response.

Main Methods:

  • Developed a theoretical framework incorporating vibronic interactions (Jahn-Teller effect).
  • Included dipole-field interactions within the model.
  • Analyzed the zeroth, first, and second harmonics of the induced molecular dipole moment.

Main Results:

  • The first-harmonic dipole moment remains collinear with the electric field.
  • Zeroth and second harmonic components rotate oppositely at twice the angle due to C3 symmetry.
  • This counter-rotation allows for arbitrary orientation and direct measurement of harmonic contributions.
  • Strong resonances observed at frequencies determined by vibronic parameters.

Conclusions:

  • The theoretical model provides a comprehensive understanding of octupolar molecule nonlinear THz response.
  • The distinct rotational dynamics of dipole moment harmonics offer new avenues for molecular characterization.
  • Identifiable spectral features arise from vibronic interactions, facilitating experimental observation.