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

Hydrogen Bonds00:26

Hydrogen Bonds

136.0K
Hydrogen bonds are weak attractions between atoms that have formed other chemical bonds. One of these atoms is electronegative, like oxygen, and has a partial negative charge. The other is a hydrogen atom that has bonded with another electronegative atom and has a partial positive charge.
Hydrogen Bonds Control the World!
Because hydrogen has very weak electronegativity when it binds with a strongly electronegative atom, such as oxygen or nitrogen, electrons in the bond are unequally shared....
136.0K
Hydrogen Bonds01:04

Hydrogen Bonds

15.8K
A hydrogen bond is formed when a weakly positive hydrogen atom already bonded to one electronegative atom (for example, the oxygen in the water molecule) is attracted to another electronegative atom from another polar molecule, such as water (H2O), hydrogen fluoride (HF), or ammonia (NH3). The huge electronegativity difference between the H atom (2.1) and the atom to which it is bonded (4.0 for an F atom, 3.5 for an O atom, or 3.0 for an N atom), combined with the very small size of an H atom...
15.8K
IR Spectrum Peak Broadening: Hydrogen Bonding01:23

IR Spectrum Peak Broadening: Hydrogen Bonding

2.1K
The vibrational frequency of a bond is directly proportional to its bond strength. As a result, stronger bonds vibrate at higher frequencies, while weaker bonds vibrate at lower frequencies. The stretching vibration of the strong O–H bond in alcohols and phenols (very dilute solution or gas phase) appears as a sharp peak at 3600–3650 cm−1.
However, the extent of hydrogen bonding influences the observed stretching frequency and band broadening. Intermolecular or intramolecular...
2.1K
Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

2.4K
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
2.4K
Radical Formation: Homolysis00:54

Radical Formation: Homolysis

4.6K
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.
4.6K
Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

2.8K
Different fluorescence-based techniques are used to study the protein dynamics in living cells. These techniques include FRAP, FRET, and PET.
Fluorescent recovery after photobleaching (FRAP) is a fluorescent-protein-based detection technique used to quantify protein movement rates within the cell. This method exposes a small portion of the cell to an intense laser beam. The laser beam causes permanent photobleaching of the fluorophore-tagged proteins in the exposed region. As the bleached...
2.8K

You might also read

Related Articles

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

Sort by
Same author

Neutrophil-mediated delivery of curcumin-loaded manganese-doped zeolitic imidazolate framework-8 nanozymes for pulmonary arterial hypertension.

Journal of nanobiotechnology·2026
Same author

Association of EGFR and EGF gene polymorphisms with cervical cancer in a case-control study and cross-cancer meta-analysis.

Scientific reports·2026
Same author

Study on Differential Metabolites Between Human Papillomavirus Infection and Cervical Cancer Based on Non-Targeted Metabolomics.

International journal of women's health·2025
Same author

The therapeutic effect of norepinephrine alone or in combination with vasopressin on septic shock patients: a meta-analysis.

American journal of translational research·2025
Same author

Metabolites change reveal insights into the heartwood color formation mechanism of Dalbergia odorifera.

The Plant journal : for cell and molecular biology·2025
Same author

Anti-bacterial activity of dermcidin in human platelets: suppression of methicillin-resistant <i>Staphylococcus aureus</i> growth.

Microbiology spectrum·2025
Same journal

Quantum chemical investigations on D-σ-A architecture based organic chemical species containing polyacenes (C<sub>4n+2</sub>H<sub>2n+4</sub>, n = 1-5) as electron donors for determining their feasibility to function as single-molecule diodes.

Journal of molecular modeling·2026
Same journal

Functional group effects on thermal stability of high-nitrogen fused-ring zwitterionic energetic materials: a DFT study.

Journal of molecular modeling·2026
Same journal

Computational insight into the antioxidant activity of thymol in diverse solvent environments: a DFT approach.

Journal of molecular modeling·2026
Same journal

SMASH: Screening Molecules Accurately on Small Hardware. Fast, user-friendly, enhanced with a machine learning virtual screening tool.

Journal of molecular modeling·2026
Same journal

Penetration resistance of g-C<sub>3</sub>N<sub>4</sub>/h-BN heterojunction nanocomposite coatings applied to concrete surfaces.

Journal of molecular modeling·2026
Same journal

A DFT study on molecular modeling of aluminum-germanium Cu-doped/undoped cluster for NLO responses by structural tuning.

Journal of molecular modeling·2026
See all related articles

Related Experiment Video

Updated: Mar 16, 2026

Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch
09:33

Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch

Published on: February 7, 2022

4.0K

Photoinduced hydrogen-bonding dynamics.

Tian-Shu Chu1,2, Jinmei Xu3,4

  • 1Institute for Computational Sciences and Engineering, Laboratory of New Fiber Materials and Modern Textile, The Growing Base for State Key Laboratory and College of Physics, Qingdao University, Qingdao, 266071, China. tschu008@163.com.

Journal of Molecular Modeling
|August 6, 2016
PubMed
Summary
This summary is machine-generated.

Photoexcitation alters hydrogen bonds, influencing chemical reactions and photophysical processes. This review explores ultrafast hydrogen bond dynamics using spectroscopy and theory, revealing new insights into photoinduced phenomena.

Keywords:
DFT/TDDFT calculationsElectronic and vibrational dynamicsFemtolaser spectroscopy techniquesPhotoinduced hydrogen bonding dynamicsPhotoinduced phenomena

More Related Videos

Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy
10:03

Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy

Published on: June 27, 2014

18.5K
Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
10:35

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

9.3K

Related Experiment Videos

Last Updated: Mar 16, 2026

Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch
09:33

Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch

Published on: February 7, 2022

4.0K
Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy
10:03

Proton Transfer and Protein Conformation Dynamics in Photosensitive Proteins by Time-resolved Step-scan Fourier-transform Infrared Spectroscopy

Published on: June 27, 2014

18.5K
Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
10:35

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

9.3K

Area of Science:

  • Photochemistry
  • Physical Chemistry
  • Spectroscopy

Background:

  • Hydrogen bonding dynamics are crucial in photophysical and photochemical processes.
  • Ultrafast spectroscopy and quantum chemistry have advanced the study of these dynamics.
  • Changes in hydrogen bonds upon photoexcitation affect molecular transformations.

Purpose of the Study:

  • To review combined experimental and theoretical studies on ultrafast electronic and vibrational hydrogen bonding dynamics.
  • To highlight new mechanisms, proposals, and rules governing photoinduced phenomena.
  • To advance the understanding of hydrogen bond dynamics in various systems.

Main Methods:

  • Femtolaser spectroscopy experiments
  • Quantum chemistry calculations
  • Combined experimental and theoretical approaches

Main Results:

  • New mechanisms and proposals for photoinduced phenomena have been identified.
  • Common rules governing hydrogen bond dynamics have been established.
  • Insights into ultrafast electronic and vibrational dynamics were gained.

Conclusions:

  • The joint approach of laser spectroscopy and theoretical calculation advances understanding of photoinduced hydrogen bonding dynamics.
  • New insights were provided for phenomena including photosynthesis, proton transfer, and water network rearrangements.
  • The study offers a comprehensive overview of recent advances in the field.