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

Protein Dynamics in Living Cells01:19

Protein Dynamics in Living Cells

2.6K
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...
2.6K
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
Variables Affecting Phosphorescence and Fluorescence01:26

Variables Affecting Phosphorescence and Fluorescence

1.2K
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...
1.2K
Photoluminescence: Fluorescence and Phosphorescence01:23

Photoluminescence: Fluorescence and Phosphorescence

3.4K
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...
3.4K

You might also read

Related Articles

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

Sort by
Same author

Evidence of static quenching in the photoredox activity of perylene diimide radical anions: implications for consecutive photoinduced electron transfer photocatalysis.

Chemical science·2026
Same author

Polymerization-Inhibited Twisted Intramolecular Charge Transfer for Strong Molecular Aggregate Emission.

ACS polymers Au·2026
Same author

Influence of the substitution pattern on exciton localisation in centrosymmetric quadrupolar dyes.

Physical chemistry chemical physics : PCCP·2026
Same author

When Dielectric Constants Deceive: Interrogating Solvation in Ionic Liquids with Cyclic Voltammetry.

The journal of physical chemistry. B·2026
Same author

Ovalene Photophysics Revisited.

The journal of physical chemistry. A·2026
Same author

Challenges and Opportunities in Machine Learning for Light-Emitting Polymers.

Macromolecular rapid communications·2026

Related Experiment Video

Updated: Jan 9, 2026

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

9.4K

Photoinduced charge-transfer dynamics in fluorescent electron donor-acceptor polymers.

Estefanía Sucre-Rosales1, Suiying Ye2, Yinyin Bao2,3

  • 1Department of Physical Chemistry, University of Geneva 30 Quai Ernest-Ansermet CH-1211 Geneva 4 Switzerland eric.vauthey@unige.ch.

Chemical Science
|December 4, 2025
PubMed
Summary

We investigated electron donor-acceptor (D-A) polymers for tunable emission. In films, ultrafast electron transfer between polymer chains dictates excited-state dynamics and emission, differing from solution behavior.

More Related Videos

Real-time Monitoring of Ligand-receptor Interactions with Fluorescence Resonance Energy Transfer
12:23

Real-time Monitoring of Ligand-receptor Interactions with Fluorescence Resonance Energy Transfer

Published on: August 20, 2012

14.9K
Examining the Conformational Dynamics of Membrane Proteins in situ with Site-directed Fluorescence Labeling
11:55

Examining the Conformational Dynamics of Membrane Proteins in situ with Site-directed Fluorescence Labeling

Published on: May 29, 2011

15.5K

Related Experiment Videos

Last Updated: Jan 9, 2026

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

9.4K
Real-time Monitoring of Ligand-receptor Interactions with Fluorescence Resonance Energy Transfer
12:23

Real-time Monitoring of Ligand-receptor Interactions with Fluorescence Resonance Energy Transfer

Published on: August 20, 2012

14.9K
Examining the Conformational Dynamics of Membrane Proteins in situ with Site-directed Fluorescence Labeling
11:55

Examining the Conformational Dynamics of Membrane Proteins in situ with Site-directed Fluorescence Labeling

Published on: May 29, 2011

15.5K

Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Photophysics

Background:

  • Electron donor-acceptor (D-A) polymers offer tunable emission properties for advanced materials.
  • Naphthalenediimide (NDI) based polymers are explored for their unique photophysical characteristics.

Purpose of the Study:

  • Investigate excited-state dynamics of NDI-based polymers with polystyrene donors.
  • Compare dynamics in diluted solutions versus solid polymer films.
  • Understand factors influencing emission properties and charge-transfer states.

Main Methods:

  • Synthesis of D-A polymers with NDI acceptors and polystyrene donors.
  • Spectroscopic analysis of excited-state dynamics in solution and film states.
  • Photoselection techniques using red-edge excitation.

Main Results:

  • Ultrafast intrachain electron transfer observed in solutions; interchain transfer dominates in films.
  • Emission originates from strongly coupled D-A pairs, leading to broadened absorption bands.
  • Charge-transfer state decay occurs on the ns timescale via recombination pathways, with suppression of triplet state formation by secondary donors.

Conclusions:

  • Polymer packing significantly alters excited-state dynamics and emission mechanisms.
  • Strong D-A coupling enables photoselection via red-edge excitation.
  • Secondary donors can be optimized to enhance fluorescence quantum yield by suppressing non-radiative decay.