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

Photoluminescence: Applications01:14

Photoluminescence: Applications

503
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
503
The Antenna Complex01:15

The Antenna Complex

6.3K
Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency can...
6.3K

You might also read

Related Articles

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

Sort by
Same author

Multi-metal cooperation drives chemoresistance in lung cancer and is reversed by the membrane-permeable chelator MiADMSA.

Cell death discovery·2026
Same author

Photocatalytic Controlled Halodefluorination of Perfluoroalkyl Compounds Using <i>N</i>-Arylphenothiazines.

Journal of the American Chemical Society·2026
Same author

Homoconjugation-induced enhancements of photophysical properties in donor-acceptor triptycenes arise from interplay between intramolecular charge transfer and exciton states.

Chemical science·2026
Same author

Excited-State Antiaromaticity in Nonbenzenoid Aromatics: Examining the Dynamics of Intramolecular Proton Transfer With a Small Driving Force.

Angewandte Chemie (International ed. in English)·2026
Same author

Peering Through the Polymer: Tracking Small Molecules to Improve Polymer Development.

Macromolecules·2026
Same author

Enhancing the Red and Near Infrared OLED Efficiency of a TADF Emitter through an Internal Solvation Effect.

ACS applied materials & interfaces·2026

Related Experiment Video

Updated: Sep 19, 2025

Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells
08:31

Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells

Published on: September 16, 2014

12.2K

Counterion-Mediated Luminophore Dimerization.

Ash G Carter1,2, Promeet K Saha1,2, Antara Sikder1

  • 1Department of Chemistry, University of York, Heslington, YO10 5DD, UK.

Angewandte Chemie (International Ed. in English)
|June 17, 2025
PubMed
Summary

Counterions significantly influence organic salt emission. Varying anions with a single luminophore, N-methyl quininium, altered solution emission from monomer to dimer and excimer states.

Keywords:
AggregationDimersExcimersFluorescenceNoncovalent interactions

More Related Videos

Creating Highly Specific Chemically Induced Protein Dimerization Systems by Stepwise Phage Selection of a Combinatorial Single-Domain Antibody Library
10:17

Creating Highly Specific Chemically Induced Protein Dimerization Systems by Stepwise Phage Selection of a Combinatorial Single-Domain Antibody Library

Published on: January 14, 2020

7.9K
Isolating and Incorporating Light-Harvesting Antennas from Diatom Cyclotella Meneghiniana in Liposomes with Thylakoid Lipids
11:28

Isolating and Incorporating Light-Harvesting Antennas from Diatom Cyclotella Meneghiniana in Liposomes with Thylakoid Lipids

Published on: August 28, 2018

7.9K

Related Experiment Videos

Last Updated: Sep 19, 2025

Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells
08:31

Luminescence Resonance Energy Transfer to Study Conformational Changes in Membrane Proteins Expressed in Mammalian Cells

Published on: September 16, 2014

12.2K
Creating Highly Specific Chemically Induced Protein Dimerization Systems by Stepwise Phage Selection of a Combinatorial Single-Domain Antibody Library
10:17

Creating Highly Specific Chemically Induced Protein Dimerization Systems by Stepwise Phage Selection of a Combinatorial Single-Domain Antibody Library

Published on: January 14, 2020

7.9K
Isolating and Incorporating Light-Harvesting Antennas from Diatom Cyclotella Meneghiniana in Liposomes with Thylakoid Lipids
11:28

Isolating and Incorporating Light-Harvesting Antennas from Diatom Cyclotella Meneghiniana in Liposomes with Thylakoid Lipids

Published on: August 28, 2018

7.9K

Area of Science:

  • Photochemistry
  • Materials Science
  • Supramolecular Chemistry

Background:

  • Emissive organic salts are crucial for fluorescence and luminescent dyes.
  • Counterions typically tune solubility, not aggregation or emission.
  • The effect of counterions on organic salt aggregation and emission in solution is understudied.

Purpose of the Study:

  • Investigate how counterion choice impacts the aggregation and emission of organic salts.
  • Explore the formation of different emissive states (monomer, dimer, excimer) by modifying the counterion.

Main Methods:

  • Utilized N-methyl quininium (MeQn+) as a cationic luminophore.
  • Paired MeQn+ with various monovalent anions in solution.
  • Analyzed absorption, excitation, and emission spectra at different concentrations.

Main Results:

  • At low concentrations, all salts exhibited identical MeQn+ monomer spectra.
  • At higher concentrations, distinct spectral changes indicated monomer, dimer, or excimer formation.
  • The specific anion structure dictated the observed emissive state.

Conclusions:

  • Counterion structure is a key factor in controlling organic salt aggregation and emission in solution.
  • Specific ion effects can modulate the formation of dimeric and aggregated species.
  • This understanding can guide the design of novel molecular probes and optoelectronic materials.