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

Photochemical Electrocyclic Reactions: Stereochemistry01:26

Photochemical Electrocyclic Reactions: Stereochemistry

2.2K
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
2.2K
Deactivation Processes: Jablonski Diagram01:25

Deactivation Processes: Jablonski Diagram

1.7K
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...
1.7K
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

2.9K
Electrocyclic reactions are reversible reactions. They involve an intramolecular cyclization or ring-opening of a conjugated polyene. Shown below are two examples of electrocyclic reactions. In the first reaction, the formation of the cyclic product is favored. In contrast, in the second reaction, ring-opening is favored due to the high ring strain associated with cyclobutene formation.
2.9K
UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

UV–Vis Spectroscopy: Molecular Electronic Transitions

2.7K
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...
2.7K
Variables Affecting Phosphorescence and Fluorescence01:26

Variables Affecting Phosphorescence and Fluorescence

1.3K
Fluorescence and phosphorescence are essential phenomena in fields like analytical chemistry, biological imaging, and materials science, where they detect molecular properties and visualize cellular structures. Understanding the variables that influence these luminescent behaviors is crucial for maximizing accuracy and efficiency in their applications. These variables can broadly be grouped into chemical structure, solvent properties, and external conditions, each playing a distinct role in...
1.3K
Radical Formation: Homolysis00:54

Radical Formation: Homolysis

4.2K
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.
4.2K

You might also read

Related Articles

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

Sort by
Same author

The Mixed-Valence Missing Link: Direct Observation of Borderline Electron Transfer Dynamics.

The journal of physical chemistry letters·2026
Same author

Controlling the Flow of Charges across Phthalocyanine@Transition-Metal Dichalcogenide Interfaces.

Journal of the American Chemical Society·2026
Same author

Red-Light Photoredox C-H Alkylation of Acceptor Heterocycles Enabled by Substoichiometric NADH.

Organic letters·2026
Same author

Acid-responsive rhenium(I) NHC complexes: pyrazine <i>vs.</i> pyridine.

Dalton transactions (Cambridge, England : 2003)·2026
Same author

Synthesis and Excited-State Dynamics in Molecular Nanographene: Herzberg-Teller Vibronic Coupling and Energy Transfer to Porphyrins.

Journal of the American Chemical Society·2025
Same author

Enzyme-inspired single-atom photocatalysis for oxygen reduction to hydrogen peroxide.

Nature communications·2025

Related Experiment Video

Updated: Jan 14, 2026

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

9.1K

Ultrafast Dissipation via Interligand Electron Transfer in {Ru(tpy)(bpy)} Chromophores.

Pedro O Abate1,2, Agustina Cotic1,2, Daiana Cabrosi1,2

  • 1Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Inorgánica, Analítica y Química Física, Pabellón 2, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina.

Inorganic Chemistry
|October 22, 2025
PubMed
Summary

Researchers studied ruthenium complexes to understand electron transfer. They found ultrafast interligand electron transfer (ILET) occurs rapidly, dissipating energy before reactions, limiting solar energy applications.

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

3.0K
[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
09:12

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

Published on: May 21, 2019

9.8K

Related Experiment Videos

Last Updated: Jan 14, 2026

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

9.1K
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

3.0K
[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst
09:12

[DPEPhosbcpCu]PF6: A General and Broadly Applicable Copper-Based Photoredox Catalyst

Published on: May 21, 2019

9.8K

Area of Science:

  • Coordination Chemistry
  • Photochemistry
  • Materials Science

Background:

  • Ruthenium complexes are vital in photochemistry and solar energy research.
  • Understanding electron transfer dynamics is key to designing efficient energy conversion systems.
  • Interligand electron transfer (ILET) is a crucial process in the photophysics of metal complexes.

Purpose of the Study:

  • To synthesize and characterize novel ruthenium complexes with varying substituents on the bipyridine ligand.
  • To investigate the influence of driving force and directionality on ultrafast interligand electron transfer (ILET).
  • To evaluate the potential of these complexes in solar-energy conversion strategies.

Main Methods:

  • Synthesis and full characterization of [Ru(tpy)(R-bpy)(CN)]+ complexes.
  • Utilized diffraction, electrochemical, and spectroscopic techniques.
  • Employed Density Functional Theory (DFT) and Time-Dependent DFT (TD-DFT) calculations.

Main Results:

  • All synthesized ruthenium complexes exhibited ultrafast ILET on the picosecond or subpicosecond timescale.
  • ILET occurred rapidly, irrespective of the driving force or directionality.
  • Observed Kasha behavior, where energy dissipation precedes bimolecular reactivity.

Conclusions:

  • Ultrafast ILET in these ruthenium complexes dissipates energy rapidly, limiting their use in solar energy conversion requiring diffusion-controlled reactivity.
  • The rapid energy dissipation via ILET precludes the utilization of high-energy excited states for such applications.
  • Findings provide insights into the photophysical limitations of specific ruthenium complexes for solar energy applications.