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

4.1K
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.
4.1K
IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration01:16

IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration

3.3K
A covalently bonded heteronuclear diatomic molecule can be modeled as two vibrating masses connected by a spring. The vibrational frequency of the bond can be expressed using an equation derived from Hooke's law, which describes how the force applied to stretch or compress a spring is proportional to the displacement of the spring. In this case, the atoms behave like masses, and the bond acts like a spring.
According to Hooke's law, the vibrational frequency is directly proportional to...
3.3K
IR Spectroscopy: Molecular Vibration Overview01:24

IR Spectroscopy: Molecular Vibration Overview

5.7K
When Infrared (IR) radiation passes through a covalently bonded molecule, the bonds transition from lower to higher vibrational levels. The fundamental vibrational motions that result in infrared absorption can be classified as stretching or bending vibrations.
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...
5.7K
UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

UV–Vis Spectroscopy: Molecular Electronic Transitions

3.0K
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...
3.0K
¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

1.3K
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...
1.3K
¹³C NMR: ¹H–¹³C Decoupling01:04

¹³C NMR: ¹H–¹³C Decoupling

1.7K
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
1.7K

You might also read

Related Articles

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

Sort by
Same author

Trends in Medicare Part D prescription claims for biologic and nonbiologic immunosuppressive medications by dermatologists.

Journal of the American Academy of Dermatology·2020
Same author

Tripeptide and hexapeptide topical as adjunct to nonablative fractional resurfacing for photodamage: A randomized split-face trial.

Journal of cosmetic dermatology·2020
Same author

Rare case of a basal cell carcinoma with intravascular invasion.

International journal of women's dermatology·2020
Same author

The Complete Genome Sequence of a Bacterial Strain with High Alkalic Xylanase Activity Isolated from the Sludge Near a Papermill.

Current microbiology·2020
Same author

Assessment of treatment tolerance and parental perspective of outpatient pulsed-dye laser treatment for port wine birthmark without general anesthesia in infants and toddlers.

Journal of the American Academy of Dermatology·2020
Same author

Association Between Non-high-density Lipoprotein Cholesterol and 3-Month Prognosis in Patients With Spontaneous Intracerebral Hemorrhage.

Frontiers in neurology·2020

Related Experiment Video

Updated: Apr 29, 2026

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
10:40

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

7.0K

Hidden physics in molecular rovibrational spectrum.

Weiguo Sun1, Yi Zhang2, Qunchao Fan3

  • 1School of Physics and Chemistry, Research Center for Advanced Computation, Xihua University, Chengdu, Sichuan 610039, PR China; Institute of Atomic and Molecular Physics, Sichuan University, Chengdu, Sichuan 610065, PR China.

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
|May 24, 2014
PubMed
Summary
This summary is machine-generated.

A new algebraic method for rotational energies (AMr) accurately reveals hidden molecular rotational spectra and rovibrational interactions. This method offers improved accuracy for lighter molecules like 7Li2, showing rovibrational interactions stabilize molecular systems.

Keywords:
Algebraic methodDiatomic moleculesInteraction energiesRotational energiesRovibrational spectrum

More Related Videos

Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
08:54

Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid

Published on: January 25, 2020

5.0K
Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
14:55

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy

Published on: September 17, 2017

16.8K

Related Experiment Videos

Last Updated: Apr 29, 2026

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
10:40

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

7.0K
Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid
08:54

Vibrational Spectra of a N719-Chromophore/Titania Interface from Empirical-Potential Molecular-Dynamics Simulation, Solvated by a Room Temperature Ionic Liquid

Published on: January 25, 2020

5.0K
Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy
14:55

Atomic Scale Structural Studies of Macromolecular Assemblies by Solid-state Nuclear Magnetic Resonance Spectroscopy

Published on: September 17, 2017

16.8K

Area of Science:

  • Molecular Spectroscopy
  • Quantum Chemistry
  • Computational Chemistry

Background:

  • Understanding molecular energies is crucial for predicting chemical behavior.
  • Accurate calculation of rotational and rovibrational energies is essential for molecular spectroscopy.
  • Existing models like the rigid rotor approximation have limitations, especially for lighter molecules.

Purpose of the Study:

  • To introduce a novel algebraic method for rotational energies (AMr).
  • To extract hidden rotational spectra (ɛJ) and rovibrational interaction energies (ευJint) from total rovibrational energies (EυJ).
  • To assess the accuracy and applicability of the AMr method for different molecular systems.

Main Methods:

  • Development of the algebraic method for rotational energies (AMr).
  • Application of AMr to the excited electronic state a3Σu+ of 7Li2.
  • Application of AMr to the ground state X1Σ+ of NaF.
  • Comparison of AMr results with the rigid rotor model.

Main Results:

  • The AMr method successfully unearths rotational spectra and rovibrational interaction energies.
  • AMr provides more accurate rotational energies for the lighter 7Li2 molecule compared to the rigid rotor model, especially for low rotational states.
  • The rigid rotor model yields satisfactory rotational energies for the heavier NaF molecule.
  • Attractive rovibrational interaction energies (ευJint) were found to stabilize molecular rovibrational systems.

Conclusions:

  • The AMr method is a valuable tool for analyzing molecular rovibrational energies.
  • The accuracy of rotational energy calculations depends on molecular properties, with AMr outperforming the rigid rotor model for lighter molecules.
  • Rovibrational interactions play a significant role in the stabilization of molecular systems.