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

Oxidation of Phenols to Quinones01:17

Oxidation of Phenols to Quinones

4.2K
In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
4.2K
UV–Vis Spectroscopy: Molecular Electronic Transitions01:16

UV–Vis Spectroscopy: Molecular Electronic Transitions

2.5K
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...
2.5K
Fluorescence and Phosphorescence: Instrumentation01:25

Fluorescence and Phosphorescence: Instrumentation

1.3K
Fluorometers and spectrofluorometers are two types of instruments used for measuring molecular fluorescence. These instruments differ in how they select excitation and emission wavelengths and the type of light sources they utilize. Fluorometers use absorption interference filters to choose excitation and emission wavelengths. The excitation source in a fluorometer is typically a low-pressure mercury vapor lamp that emits intense lines distributed throughout the ultraviolet and visible regions.
1.3K
Variables Affecting Phosphorescence and Fluorescence01:26

Variables Affecting Phosphorescence and Fluorescence

1.1K
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...
1.1K
Deactivation Processes: Jablonski Diagram01:25

Deactivation Processes: Jablonski Diagram

1.5K
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...
1.5K
Photoelectric Effect02:26

Photoelectric Effect

38.1K
When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
38.1K

You might also read

Related Articles

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

Sort by
Same author

Thermal transport through molecular monolayers in plasmonic nanogaps.

Nature communications·2026
Same author

Heteroatom Effects on Quantum Interference in Molecular Junctions: Exploring Perturbation through Multiple Cross-Conjugation.

The journal of physical chemistry. C, Nanomaterials and interfaces·2026
Same author

Phosphorylation-Dependent Charge Transport in Biomolecular Junctions of Major Histocompatibility Complex Phosphopeptides.

The journal of physical chemistry. B·2026
Same author

Experimental and Theoretical Studies of Isomeric Metal (N^C^N)Cl Coordination Complexes (Metal = Pt, Pd) with Multiple Conductance Pathways in Single-Molecule Junctions.

The journal of physical chemistry. C, Nanomaterials and interfaces·2026
Same author

Probing the Dynamics and Configurations of Single-Molecule Junctions via Seebeck Coefficient Spectroscopy.

Nano letters·2026
Same author

Transient Au-Cl adlayers modulate the surface chemistry of gold nanoparticles during redox reactions.

Nature chemistry·2025

Related Experiment Video

Updated: Dec 12, 2025

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

3.8K

Switching Quantum Interference in Phenoxyquinone Single Molecule Junction with Light.

Abdalghani Daaoub1, Sara Sangtarash1, Hatef Sadeghi1

  • 1Device Modelling Group, School of Engineering, University of Warwick, Coventry CV4 7AL, UK.

Nanomaterials (Basel, Switzerland)
|August 13, 2020
PubMed
Summary
This summary is machine-generated.

Light-induced structural changes in phenoxyquinone derivatives enable control over quantum interference (QI). This switching mechanism significantly alters single-molecule conductance, paving the way for novel photosensitive molecular switches.

Keywords:
electrical conductancemolecular electronicsphotochromic moleculesphotoswitchesquantum interference

More Related Videos

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
12:19

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Published on: April 4, 2017

8.7K
High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
10:40

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

7.8K

Related Experiment Videos

Last Updated: Dec 12, 2025

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

3.8K
Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
12:19

Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

Published on: April 4, 2017

8.7K
High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy
10:40

High Resolution Phonon-assisted Quasi-resonance Fluorescence Spectroscopy

Published on: June 28, 2016

7.8K

Area of Science:

  • Molecular Electronics
  • Quantum Chemistry
  • Photoswitchable Materials

Background:

  • Quantum interference (QI) significantly impacts single-molecule conductance.
  • Controlling QI with external stimuli, particularly light, remains a challenge in molecular electronics.
  • Phenoxyquinone derivatives offer potential for light-tunable molecular structures.

Purpose of the Study:

  • To investigate the control of quantum interference (QI) in phenoxyquinone derivatives using light.
  • To demonstrate the feasibility of light-induced structural modifications for tuning single-molecule conductance.
  • To explore the potential of these systems as photosensitive molecular switches.

Main Methods:

  • Theoretical calculations were employed to study phenoxyquinone derivatives.
  • The effect of light stimulus on molecular structure was modeled.
  • Quantum interference phenomena and their impact on conductance were analyzed computationally.

Main Results:

  • Reversible light-induced structural tuning of phenoxyquinone derivatives was confirmed.
  • A crossover from destructive to constructive quantum interference was observed due to structural variations.
  • Single-molecule conductance varied by orders of magnitude, demonstrating effective QI control.

Conclusions:

  • Light-controlled quantum interference in phenoxyquinone derivatives represents a novel approach for molecular electronics.
  • This study establishes a new paradigm for photosensitive single-molecule switches.
  • The findings open avenues for developing advanced QI-based photoswitches.