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

Potential Energy00:52

Potential Energy

42.7K
The energy stored by a structure and location of matter in space is called potential energy. For instance, raising a kettlebell changes its spatial location and increases its potential energy. Similarly, a stretched rubber band contains potential energy which, under certain conditions, can be converted into other forms of energy, such as kinetic energy.
Chemical bonds that form attractive forces between atoms also contain potential energy, called chemical energy. When a chemical reaction...
42.7K
Potential Energy01:09

Potential Energy

1.0K
A conservative force, such as a gravitational or elastic force, gives the body the capacity to do work. This capacity, measured as the potential energy, depends on the body's location or “position” relative to a fixed reference position or datum. The gravitational potential energy is considered zero at the reference point. Suppose a body is located at some vertical distance above a fixed horizontal reference or datum. In that case, the weight of the body has positive gravitational potential...
1.0K
Cell Potential and Free Energy02:58

Cell Potential and Free Energy

46.5K
Thermodynamics of a Redox Reaction
Thermodynamics is the branch of physics dealing with the relationship between heat and other forms of energy. In an electrochemical cell, chemical energy is converted into electrical energy.
Thus, a link can be predicted between cell potential, free energy change, and the equilibrium constant for the reaction. Cell potential can also be measured as the oxidant or the reducing strength, and similar acid-base strength measures are reflected in equilibrium...
46.5K
Surface Tension and Surface Energy01:16

Surface Tension and Surface Energy

3.3K
When a paint brush is immersed in water, the bristles wave freely inside the water. When it is taken out, the bristles stick together. The reason behind this effect is surface tension.
Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...
3.3K
Emission Spectra02:39

Emission Spectra

76.3K
When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
76.3K
Types of Potential Energy01:16

Types of Potential Energy

10.0K
Potential energy is also known as energy at rest or stored energy. Common types of potential energy include the gravitational potential energy stored in an apple hanging from a tree, the electrical potential energy stored in an object due to the attraction or repulsion of electric charges, and the chemical potential energy stored in the bonds between atoms and molecules. Additionally, the nuclear energy stored in an atomic nucleus and the elastic energy stored in a stretched spring due to its...
10.0K

You might also read

Related Articles

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

Sort by
Same author

Perspective on a challenge: Predicting the photochemistry of cyclobutanone.

The Journal of chemical physics·2026
Same author

Mechanistic insights into room-temperature phosphorescence in a 1,4-diiodotetrafluorobenzene-phenanthrene cocrystal.

Physical chemistry chemical physics : PCCP·2026
Same author

Electric Field Pushes the Water Dimer Radical Cation toward the Hemibonded Structure.

The journal of physical chemistry letters·2026
Same author

The Newton-X platform for mixed quantum-classical dynamics.

Physical chemistry chemical physics : PCCP·2026
Same author

Modulating the Rate of Charge Recombination in Bichromophore End-Capped Hairpin DNA Sequences.

The journal of physical chemistry letters·2026
Same author

Theoretical study on the photochemical reaction mechanism of the HOSO radical with CO.

Physical chemistry chemical physics : PCCP·2026

Related Experiment Video

Updated: Feb 1, 2026

Multiscale Structures Aggregated by Imprinted Nanofibers for Functional Surfaces
06:14

Multiscale Structures Aggregated by Imprinted Nanofibers for Functional Surfaces

Published on: September 11, 2018

7.0K

Exploring Potential Energy Surfaces for Aggregation-Induced Emission-From Solution to Crystal.

Rachel Crespo-Otero1, Quansong Li2, Lluís Blancafort3

  • 1School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London, E1 4NS, United Kingdom.

Chemistry, an Asian Journal
|December 15, 2018
PubMed
Summary

Aggregation-induced emission (AIE) occurs when non-luminescent molecules become emissive in aggregates. Theory and computation reveal that restricted access to conical intersections (RACI) explains this AIE mechanism, impacting luminescent applications.

Keywords:
aggregation-induced emissionconical intersectionsfluorescenceintermolecular interactionspotential energy surfaces

More Related Videos

Measurement of Aggregate Cohesion by Tissue Surface Tensiometry
12:49

Measurement of Aggregate Cohesion by Tissue Surface Tensiometry

Published on: April 8, 2011

13.0K
Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions
08:18

Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions

Published on: June 12, 2016

17.3K

Related Experiment Videos

Last Updated: Feb 1, 2026

Multiscale Structures Aggregated by Imprinted Nanofibers for Functional Surfaces
06:14

Multiscale Structures Aggregated by Imprinted Nanofibers for Functional Surfaces

Published on: September 11, 2018

7.0K
Measurement of Aggregate Cohesion by Tissue Surface Tensiometry
12:49

Measurement of Aggregate Cohesion by Tissue Surface Tensiometry

Published on: April 8, 2011

13.0K
Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions
08:18

Design and Use of a Full Flow Sampling System FFS for the Quantification of Methane Emissions

Published on: June 12, 2016

17.3K

Area of Science:

  • Materials Science
  • Physical Chemistry
  • Theoretical Chemistry

Background:

  • Aggregation-induced emission (AIE) is a photophysical phenomenon where molecules gain luminescence upon aggregation.
  • AIE has rapidly advanced luminescent material applications over the last 15 years.
  • Understanding the molecular mechanisms of AIE is crucial for designing new materials.

Purpose of the Study:

  • To review the theoretical and computational contributions to understanding the molecular mechanisms of AIE.
  • To explore the evolution of models explaining AIE, from RIR to RACI.
  • To highlight the role of excited-state potential energy surfaces and intermolecular interactions in AIE.

Main Methods:

  • Review of theoretical and computational studies on AIE mechanisms.
  • Analysis of initial models like Restriction of Intramolecular Rotations (RIR).
  • Focus on calculations of non-radiative rates using Fermi's Golden Rule (FGR) and excited-state potential energy surfaces.

Main Results:

  • The Restricted Access to Conical Intersection (RACI) model provides a robust explanation for AIE in various AIEgens.
  • Lack of fluorescence in solution is attributed to radiationless decay at a conical intersection (CI).
  • Aggregation hinders this CI, preventing non-radiative decay and enabling luminescence.

Conclusions:

  • Theoretical and computational approaches have elucidated the molecular basis of AIE.
  • The RACI model is a key framework for understanding AIE phenomena.
  • Intermolecular interactions significantly influence the photophysical properties (quantum yield, emission color) of AIE materials in the aggregate state.