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

2.3K
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
2.3K
Deactivation Processes: Jablonski Diagram01:25

Deactivation Processes: Jablonski Diagram

1.9K
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...
1.9K
Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

4.0K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
4.0K
Cycloaddition Reactions: MO Requirements for Photochemical Activation01:12

Cycloaddition Reactions: MO Requirements for Photochemical Activation

2.8K
Some cycloaddition reactions are activated by heat, while others are initiated by light. For example, a [2 + 2] cycloaddition between two ethylene molecules occurs only in the presence of light. It is photochemically allowed but thermally forbidden.
2.8K
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
Thermal and Photochemical Electrocyclic Reactions: Overview01:26

Thermal and Photochemical Electrocyclic Reactions: Overview

3.1K
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.
3.1K

You might also read

Related Articles

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

Sort by
Same author

Monitoring food spoilage biogenic amines utilizing a blue-emitting fluorescent ionic liquid.

The Analyst·2026
Same author

Construction of an Interpretable Regression Model for Yield Prediction and Mechanistic Insight Enabled by Automated Reaction Path Exploration.

Journal of the American Chemical Society·2026
Same author

Self-assembly behavior of a phenanthroimidazole- and naphthalene-pendant photoluminescent ionic liquid and its application for cascade detection of Hg<sup>2+</sup> and I<sup>-</sup> ions.

Physical chemistry chemical physics : PCCP·2026
Same author

Catalytic Asymmetric Hydration of Alkenes.

Journal of the American Chemical Society·2026
Same author

A Virtual Model for Describing Organophosphorus Reactivity: Validation and Application to Virtual Molecule-Assisted Optimization.

Journal of computational chemistry·2026
Same author

A green emitting phenanthroimidazolate anionic room temperature ionic liquid and its low-dimensional materials for ultrasensitive detection of Hg<sup>2+</sup> Ions.

Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology·2026

Related Experiment Video

Updated: Feb 19, 2026

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
11:26

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light

Published on: September 12, 2014

13.1K

Triplet-sensitized photon upconversion in deep eutectic solvents.

Yoichi Murakami1, Sudhir Kumar Das, Yuki Himuro

  • 1School of Engineering, Tokyo Institute of Technology, 2-12-1-I1-15 Ookayama, Meguro-ku, Tokyo 152-8552, Japan. murakami.y.af@m.titech.ac.jp.

Physical Chemistry Chemical Physics : PCCP
|November 9, 2017
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel photon upconversion (UC) platform using deep eutectic solvents (DESs). This cost-effective, stable, and eco-friendly technology enhances solar energy conversion by converting low-energy photons to higher-energy ones.

More Related Videos

Triplet Fusion Upconversion Nanocapsule Synthesis
08:36

Triplet Fusion Upconversion Nanocapsule Synthesis

Published on: September 7, 2022

2.9K
Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera
06:08

Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera

Published on: December 27, 2018

9.5K

Related Experiment Videos

Last Updated: Feb 19, 2026

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
11:26

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light

Published on: September 12, 2014

13.1K
Triplet Fusion Upconversion Nanocapsule Synthesis
08:36

Triplet Fusion Upconversion Nanocapsule Synthesis

Published on: September 7, 2022

2.9K
Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera
06:08

Time-resolved Photophysical Characterization of Triplet-harvesting Organic Compounds at an Oxygen-free Environment Using an iCCD Camera

Published on: December 27, 2018

9.5K

Area of Science:

  • Materials Science
  • Photochemistry
  • Green Chemistry

Background:

  • Photon upconversion (UC) enhances solar energy utilization by converting low-energy photons to higher-energy ones.
  • Triplet-triplet annihilation (TTA) UC is effective for weak light but faces challenges in cost, stability, and material safety.
  • Deep eutectic solvents (DESs) offer a low-cost, green alternative with high thermal stability and low toxicity.

Purpose of the Study:

  • To develop a novel photon upconversion (UC) materials platform using deep eutectic solvents (DESs).
  • To investigate the feasibility of DESs as suitable solvents for triplet-sensitized UC applications.
  • To create a cost-effective, stable, and environmentally friendly UC system.

Main Methods:

  • Fabrication of triplet-sensitized UC samples utilizing various DES compositions.
  • Qualitative assessment of the thermal stability of the developed UC samples.
  • Determination of UC quantum yields and analysis of photophysical properties, including triplet lifetime.

Main Results:

  • Successful development of a novel UC platform based on DESs.
  • Demonstrated high thermal stability of the UC samples.
  • Achieved UC quantum yields ranging from 0.11 to 0.21.
  • Observed unique kinetics where triplet lifetime increased with DES viscosity.

Conclusions:

  • DESs provide a suitable and advantageous solvent system for triplet-sensitized photon upconversion.
  • The developed UC platform offers a combination of high thermal stability, low cost, and environmental friendliness.
  • This research presents a promising new materials platform for advanced photoenergy conversion applications.