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

Molecular Spectroscopy: Absorption and Emission01:14

Molecular Spectroscopy: Absorption and Emission

5.1K
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.
5.1K
¹H NMR: Complex Splitting01:13

¹H NMR: Complex Splitting

2.1K
A proton M that is coupled to a proton X results in doublet signals for M. However, NMR-active nuclei can be simultaneously coupled to more than one nonequivalent nucleus. When M is coupled to a second proton A, such as in styrene oxide, each peak in the doublet is split into another doublet.
Splitting diagrams or splitting tree diagrams are routinely used to depict such complex couplings. While drawing splitting diagrams, the splitting with the larger coupling constant is usually applied...
2.1K
UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

UV–Vis Spectroscopy: Molecular Electronic Transitions

3.3K
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...
3.3K
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

827
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...
827
¹H NMR of Conformationally Flexible Molecules: Temporal Resolution00:52

¹H NMR of Conformationally Flexible Molecules: Temporal Resolution

1.4K
At room temperature, the chair conformer of cyclohexane undergoes rapid ring flipping between two equivalent chair conformers at a rate of approximately 105 times per second. These two chair conformers are in equilibrium. The rapid ring flipping results in the interconversion of the axial proton to an equatorial proton and an equatorial to the axial proton. Such interconversions are too rapid and cannot be detected on the NMR timescale. Hence, the NMR spectrometer cannot distinguish between the...
1.4K
¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

1.7K
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...
1.7K

You might also read

Related Articles

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

Sort by
Same author

A Gauss-Radau-Laguerre Discrete Variable Representation for Use in Continuum Electron Dynamics.

The journal of physical chemistry. A·2026
Same author

Other science opportunities at the FCC-ee.

European physical journal plus·2026
Same author

Design of a compact, high-resolution velocity-map imaging spectrometer for attosecond spectroscopy.

The Review of scientific instruments·2025
Same author

Tracking ultrafast non-adiabatic dissociation dynamics of the deuterated water dication molecule.

The Journal of chemical physics·2024
Same author

Production of positronium chloride: A study of the charge exchange reaction between Ps and Cl.

The Journal of chemical physics·2024
Same author

Positronium Laser Cooling via the 1^{3}S-2^{3}P Transition with a Broadband Laser Pulse.

Physical review letters·2024

Related Experiment Video

Updated: Mar 8, 2026

Single-Molecule Förster Resonance Energy Transfer Methods for Real-Time Investigation of the Holliday Junction Resolution by GEN1
11:27

Single-Molecule Förster Resonance Energy Transfer Methods for Real-Time Investigation of the Holliday Junction Resolution by GEN1

Published on: September 18, 2019

10.0K

Precise Access to the Molecular-Frame Complex Recombination Dipole through High-Harmonic Spectroscopy.

S B Schoun1, A Camper1, P Salières2

  • 1Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA.

Physical Review Letters
|February 4, 2017
PubMed
Summary

Researchers measured the highest-occupied molecular-orbital (HOMO) recombination dipole moment of nitrogen molecules (N₂) using high harmonic spectroscopy. Precise measurements revealed new spectral features and enabled comparison with theoretical calculations.

More Related Videos

High-Speed Atomic Force Microscopy Imaging of DNA Three-Point-Star Motif Self Assembly Using Photothermal Off-Resonance Tapping
08:59

High-Speed Atomic Force Microscopy Imaging of DNA Three-Point-Star Motif Self Assembly Using Photothermal Off-Resonance Tapping

Published on: March 22, 2024

1.2K
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

7.4K

Related Experiment Videos

Last Updated: Mar 8, 2026

Single-Molecule Förster Resonance Energy Transfer Methods for Real-Time Investigation of the Holliday Junction Resolution by GEN1
11:27

Single-Molecule Förster Resonance Energy Transfer Methods for Real-Time Investigation of the Holliday Junction Resolution by GEN1

Published on: September 18, 2019

10.0K
High-Speed Atomic Force Microscopy Imaging of DNA Three-Point-Star Motif Self Assembly Using Photothermal Off-Resonance Tapping
08:59

High-Speed Atomic Force Microscopy Imaging of DNA Three-Point-Star Motif Self Assembly Using Photothermal Off-Resonance Tapping

Published on: March 22, 2024

1.2K
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

7.4K

Area of Science:

  • Quantum Chemistry
  • Molecular Spectroscopy
  • Atomic, Molecular, and Optical Physics

Background:

  • Understanding molecular orbital dynamics is crucial for controlling chemical reactions and developing new materials.
  • High harmonic spectroscopy (HHS) is a powerful technique for probing electron dynamics in molecules.

Purpose of the Study:

  • To measure the highest-occupied molecular-orbital (HOMO) recombination dipole moment of N₂ in the molecular frame.
  • To investigate angle-resolved spectral features associated with autoionizing resonances.
  • To enable quantitative comparison with theoretical calculations.

Main Methods:

  • Utilized high harmonic spectroscopy (HHS) with a long-wavelength 1.3 μm driving laser.
  • Isolated the HOMO in the near-threshold region (19-67 eV).
  • Performed precise group delay measurements.

Main Results:

  • Reported spectral intensity and group delay measurements of the N₂ HOMO recombination dipole moment.
  • Revealed previously unseen angle-resolved spectral features linked to autoionizing resonances.
  • Achieved quantitative comparison with advanced correlated 8-channel photoionization dipole moment calculations.

Conclusions:

  • The study provides precise experimental data on molecular frame electron dynamics in N₂.
  • The findings highlight the importance of autoionizing resonances in HH S.
  • The results validate and guide theoretical models for molecular photoionization.