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

π Electron Effects on Chemical Shift: Aromatic and Antiaromatic Compounds01:14

π Electron Effects on Chemical Shift: Aromatic and Antiaromatic Compounds

1.6K
In aromatic compounds, such as benzene, the circulation of (4n + 2) π-electrons sets up a diamagnetic or diatropic ring current around the perimeter of the molecule. This current induces a magnetic field that opposes the external field inside the ring and reinforces it on the outside. The protons in benzene are deshielded and exhibit high chemical shifts in the range 6.5–8.5 ppm. The shielding effect at the center of the ring is evident in complex aromatic molecules, such as...
1.6K
UV–Vis Spectroscopy: Woodward–Fieser Rules01:29

UV–Vis Spectroscopy: Woodward–Fieser Rules

27.6K
UV–Visible absorption spectra of conjugated dienes arise from the lowest energy π → π* transitions. The light-absorbing part of the molecule is called the chromophore, and the substituents directly attached to the chromophore are called auxochromes. A strong correlation exists between the absorption maxima, λmax, and the structure of a conjugated π system. The Woodward–Fieser rules predict the value of λmax for a given structure by adding the...
27.6K
Electron Paramagnetic Resonance (EPR) Spectroscopy: Organic Radicals01:17

Electron Paramagnetic Resonance (EPR) Spectroscopy: Organic Radicals

3.1K
Ideally, an unpaired electron shows a single peak in the EPR spectrum due to the transition between the two spin energy states. However, coupling interactions can occur between the spins of the unpaired electron and any neighboring spin-active nuclei. This hyperfine coupling results in hyperfine splitting, where the EPR signal is split into multiplets. The signals split into 2nI + 1 peaks, where n is the number of equivalent nuclei and I is the nuclear spin. These splitting patterns provide...
3.1K
Mass Spectrometry: Cycloalkene Fragmentation00:54

Mass Spectrometry: Cycloalkene Fragmentation

1.4K
The molecular ions of cycloalkenes undergo fragmentation via a retro-Diels–Alder reaction.
1.4K
Mass Spectrometry: Cycloalkane Fragmentation01:05

Mass Spectrometry: Cycloalkane Fragmentation

2.0K
In mass spectrometry, cycloalkanes exhibit distinct fragmentation patterns due to the inherent stability of their molecular ions compared to linear or branched alkanes. The ring structure of cycloalkanes provides additional stability to the molecular ions, often resulting in prominent ion peaks in the mass spectrum.
For example, cyclohexane molecular ions have a mass-to-charge ratio (m/z) of 84, which tends to produce a stronger signal than linear alkanes like hexane. This stability comes from...
2.0K
Five-Membered Heterocyclic Aromatic Compounds: Overview01:13

Five-Membered Heterocyclic Aromatic Compounds: Overview

5.0K
Heterocyclic aromatic compounds are cyclic compounds that are aromatic and have one or more heteroatoms—atoms other than carbon, in the ring. Depending upon the number of atoms present in the ring, they can be either five or six-membered. Examples of five-membered heterocyclic aromatic compounds include pyrrole, furan, thiophene, and imidazole. Pyrrole consists of one nitrogen atom having one lone pair of electrons. Furan and thiophene have one oxygen and one sulfur heteroatom,...
5.0K

You might also read

Related Articles

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

Sort by
Same author

Measured active rotational-vibrational energy levels (MARVEL) analysis of high-resolution rovibrational spectra of H<sup>12</sup>C<sup>14</sup>N.

Communications chemistry·2026
Same author

Investigation of positron scattering from atomic fluorine and fluorine-containing molecules.

RSC advances·2026
Same author

Improved electron-molecule scattering calculations with the relativistic optical-potential method.

RSC advances·2026
Same author

Competition between radiative and predissociative decay mechanisms in excited electronic states of CH radical.

Physical chemistry chemical physics : PCCP·2026
Same author

First Principles Rovibronic Absorption Spectra of HF Molecule.

Journal of computational chemistry·2026
Same author

Electron scattering on carbon monoxide: An optimization of target molecular orbitals.

The Journal of chemical physics·2026
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: Dec 12, 2025

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
06:49

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation

Published on: March 2, 2021

6.6K

Electron Scattering Cross Sections for Anthracene and Pyrene.

Suvam Singh1, Dhanoj Gupta2,3, Bobby Antony1

  • 1Atomic and Molecular Physics Lab, Department of Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad, JH 826004, India.

The Journal of Physical Chemistry. A
|August 14, 2020
PubMed
Summary
This summary is machine-generated.

Electron scattering calculations for polycyclic hydrocarbons (PAHs) like anthracene and pyrene reveal new resonance data. These findings provide crucial insights into electron interactions with complex molecules found in space.

More Related Videos

ARL Spectral Fitting as an Application to Augment Spectral Data via Franck-Condon Lineshape Analysis and Color Analysis
07:11

ARL Spectral Fitting as an Application to Augment Spectral Data via Franck-Condon Lineshape Analysis and Color Analysis

Published on: August 19, 2021

2.9K
Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry
08:18

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Published on: March 4, 2021

2.0K

Related Experiment Videos

Last Updated: Dec 12, 2025

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
06:49

In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation

Published on: March 2, 2021

6.6K
ARL Spectral Fitting as an Application to Augment Spectral Data via Franck-Condon Lineshape Analysis and Color Analysis
07:11

ARL Spectral Fitting as an Application to Augment Spectral Data via Franck-Condon Lineshape Analysis and Color Analysis

Published on: August 19, 2021

2.9K
Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry
08:18

Microscopic Visualization of Porous Nanographenes Synthesized through a Combination of Solution and On-Surface Chemistry

Published on: March 4, 2021

2.0K

Area of Science:

  • Physical Chemistry
  • Astrochemistry
  • Quantum Chemistry

Background:

  • Polycyclic aromatic hydrocarbons (PAHs) are abundant in interstellar environments, such as the Red Rectangle nebula.
  • Understanding electron interactions with PAHs is vital for astrochemistry and atmospheric science.

Purpose of the Study:

  • To investigate electron scattering from anthracene and pyrene using advanced theoretical methods.
  • To compute various cross sections and identify resonant states for these complex PAHs.

Main Methods:

  • UK molecular R-matrix calculations were employed.
  • Static Exchange (SE), Static Exchange plus Polarization (SEP), and Close Coupling (CC) approximations were utilized.
  • Electron collision cross sections were computed in the energy range of 0.1–15 eV.

Main Results:

  • Elastic and inelastic electron scattering cross sections were calculated for anthracene and pyrene.
  • Dissociative electron attachment cross sections were determined.
  • Multiple shape, Feshbach/core-excited, and mixed resonances were identified below 10 eV, showing good agreement with existing data.

Conclusions:

  • This study presents novel electron collision cross section data for anthracene and pyrene.
  • The findings contribute to the understanding of electron-PAH interactions in astrophysical contexts.
  • The calculated resonance data provides a valuable benchmark for future experimental and theoretical studies.