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

Cycloaddition Reactions: MO Requirements for Photochemical Activation01:12

Cycloaddition Reactions: MO Requirements for Photochemical Activation

2.2K
Some cycloaddition reactions are activated by heat, while others are initiated by light. For example, a [2 + 2] cycloaddition between two ethylene molecules occurs only in the presence of light. It is photochemically allowed but thermally forbidden.
2.2K
¹H NMR: Complex Splitting01:13

¹H NMR: Complex Splitting

1.3K
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...
1.3K
Deactivation Processes: Jablonski Diagram01:25

Deactivation Processes: Jablonski Diagram

800
Luminescence, the emission of light by a substance that has absorbed energy, is a process that involves the interaction of molecules with light. The energy-level diagram, or Jablonski diagram, is a graphical representation of these interactions, illustrating the various states and transitions a molecule can undergo. In a typical Jablonski diagram, the lowest horizontal line represents the ground-state energy of the molecule, which is usually a singlet state. This state represents the energies...
800
Radical Formation: Homolysis00:54

Radical Formation: Homolysis

3.6K
A bond is formed between two atoms by sharing two electrons. When this bond is broken by supplying sufficient energy, either two electrons can be taken up by one atom forming ions by the cleavage called heterolysis, or the two electrons are shared by two atoms, with one each creating radicals by the cleavage called homolysis.
3.6K
Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

1.9K
The absorption of UV–visible light by conjugated systems causes the promotion of an electron from the ground state to the excited state. Consequently, photochemical electrocyclic reactions proceed via the excited-state HOMO rather than the ground-state HOMO. Since the ground- and excited-state HOMOs have different symmetries, the stereochemical outcome of electrocyclic reactions depends on the mode of activation; i.e., thermal or photochemical.
Selection Rules: Photochemical Activation
1.9K
UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

UV–Vis Spectroscopy: Molecular Electronic Transitions

1.7K
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...
1.7K

You might also read

Related Articles

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

Sort by
Same author

Electron recombination of rotationally cold D<sub>2</sub>H<sup>+</sup> ions.

Nature communications·2025
Same author

Low-energy dissociative recombination of OH.

The Journal of chemical physics·2025
Same author

Five-body recombination of identical bosons.

Proceedings of the National Academy of Sciences of the United States of America·2025
Same author

Bound and autoionizing potential energy curves in the CH molecule.

The Journal of chemical physics·2023
Same author

Observation of Wigner-Dyson level statistics in a classically integrable system.

Physical review. E·2021
Same author

Semiclassical Treatment of High-Lying Electronic States of H<sub>2</sub><sup></sup>.

The journal of physical chemistry. A·2018
Same journal

Stability of Some Ternary 13-Atom Icosahedral Clusters Assessed with Geometric, Electronic, and Thermodynamic Criteria.

The journal of physical chemistry. A·2026
Same journal

A Three-Phase Distribution Method for Quantifying the Intermolecular Interactions.

The journal of physical chemistry. A·2026
Same journal

Cooperative Effects in the Inverse Coordination Complexes of Aromatic Azines and Tin(IV) Halides.

The journal of physical chemistry. A·2026
Same journal

The Infrared Spectra of Neutral Dimethyl-Sulfide, -Disulfide and -Sulfoxide Biomarkers in Molecular Beams.

The journal of physical chemistry. A·2026
Same journal

Photoinduced Charge-Transfer Suppresses Triplet Formation Efficiency in Thiocoumarins: Evidence from Ultrafast Spectroscopy and Theoretical Calculations.

The journal of physical chemistry. A·2026
Same journal

Porphyrin Aggregation Revisited: From the Four-Orbital Gouterman Model to an Eight-Orbital Framework in Porphin H-Dimers.

The journal of physical chemistry. A·2026
See all related articles

Related Experiment Video

Updated: Aug 15, 2025

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

6.9K

Triatomic Photoassociation in an Ultracold Atom-Molecule Collision.

Ahmed A Elkamshishy1, Chris H Greene1,2

  • 1Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana47907, United States.

The Journal of Physical Chemistry. A
|December 30, 2022
PubMed
Summary
This summary is machine-generated.

This study simplifies theoretical calculations for ultracold atom-molecule collisions, revealing that polar molecules lead to a higher density of trimer states due to strong quadrupole-dipole coupling.

More Related Videos

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F&#8722;
06:53

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

Published on: July 27, 2018

8.8K
Molecular Beam Mass Spectrometry With Tunable Vacuum Ultraviolet VUV Synchrotron Radiation
09:53

Molecular Beam Mass Spectrometry With Tunable Vacuum Ultraviolet VUV Synchrotron Radiation

Published on: October 30, 2012

13.0K

Related Experiment Videos

Last Updated: Aug 15, 2025

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

6.9K
Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F&#8722;
06:53

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

Published on: July 27, 2018

8.8K
Molecular Beam Mass Spectrometry With Tunable Vacuum Ultraviolet VUV Synchrotron Radiation
09:53

Molecular Beam Mass Spectrometry With Tunable Vacuum Ultraviolet VUV Synchrotron Radiation

Published on: October 30, 2012

13.0K

Area of Science:

  • Atomic and Molecular Physics
  • Quantum Chemistry
  • Chemical Physics

Background:

  • Ultracold collisions are crucial for understanding atom-molecule interactions.
  • Experimental advancements allow precise control over ultracold neutral species.
  • Long-range interactions govern the dynamics of these collisions.

Purpose of the Study:

  • To develop a simplified theoretical model for low-energy atom-diatomic molecule collisions with photon absorption.
  • To investigate the role of long-range interactions, including spin-orbit coupling.
  • To analyze the influence of molecular polarity on collision outcomes.

Main Methods:

  • Simplified theoretical treatment of low-energy collisions.
  • Calculation of long-range potential energy curves for the triatomic complex.
  • Application of boundary conditions at the van der Waals length to mimic short-range effects.
  • Inclusion of atomic spin-orbit interaction and leading dipole-dipole, quadrupole-quadrupole, and dipole-quadrupole interactions.

Main Results:

  • The study calculates potential energy curves for the triatomic complex in detail.
  • It identifies dipole-dipole interactions as the leading term for neutral species.
  • For polar dimers, dipole-quadrupole interactions become significant, influencing trimer state density.

Conclusions:

  • A simplified theoretical approach effectively models ultracold atom-molecule collisions.
  • Polar dimers result in a higher density of trimer states compared to nonpolar dimers.
  • Strong quadrupole-dipole coupling is identified as the cause for increased trimer states with polar dimers.