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

Ion-Exchange Chromatography01:09

Ion-Exchange Chromatography

1.8K
Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
1.8K
Ionic Bonding and Electron Transfer02:48

Ionic Bonding and Electron Transfer

48.6K
Ions are atoms or molecules bearing an electrical charge. A cation (a positive ion) forms when a neutral atom loses one or more electrons from its valence shell, and an anion (a negative ion) forms when a neutral atom gains one or more electrons in its valence shell. Compounds composed of ions are called ionic compounds (or salts), and their constituent ions are held together by ionic bonds: electrostatic forces of attraction between oppositely charged cations and anions. 
48.6K
Chemical Ionization (CI) Mass Spectrometry01:21

Chemical Ionization (CI) Mass Spectrometry

1.4K
The molecular ion peak of a molecule in the mass spectrum provides vital information for molecular identification. However, conventional electron impact ionization can lead to the rapid dissociation of some molecular ions before they reach the detector. A milder ionization method is required to increase the lifetime of such ionized analyte molecules. Chemical ionization (CI) is a gas-phase protonation reaction useful for mass-analyzing analyte molecules that are easily protonated to yield the...
1.4K
Ion Exchange01:17

Ion Exchange

1.1K
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
1.1K
Electrospray Ionization (ESI) Mass Spectrometry01:12

Electrospray Ionization (ESI) Mass Spectrometry

2.1K
Higher molecular weight biomolecules are nonvolatile compounds that may decompose before ionizing or vaporizing during mass analysis with conventional electron impact ionization methods. Accordingly, electrospray ionization (ESI) is the favored method for vaporizing and ionizing biomolecules as it circumvents rapid fragmentation and enables the recording of mass signals for the entire biomolecule.
ESI utilizes electrical energy to transfer ions from the liquid phase of the sample into the...
2.1K
Ions and Ionic Charges03:27

Ions and Ionic Charges

78.2K
In ordinary chemical reactions, the nucleus — which contains the protons and neutrons of each atom and thus identifies the element — remains unchanged. Electrons, however, can be added to atoms by transfer from other atoms, lost by transfer to other atoms, or shared with other atoms. The transfer and sharing of electrons among atoms govern the chemistry of the elements. During the formation of some compounds, atoms gain or lose electrons to form electrically charged particles called...
78.2K

You might also read

Related Articles

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

Sort by
Same author

Spin State in Au Porphyrins Modulated by Charge Transfer on Au(111).

Journal of the American Chemical Society·2026
Same author

Association Between Behavioral Change and Nocturia Improvement: A Multicenter Analysis Using a Self-check Sheet.

Urology·2026
Same author

Three Decades of Change in Frequency of Sexual Intercourse and Sexual Function Among Japanese Men: A Comparative National Survey.

International journal of urology : official journal of the Japanese Urological Association·2026
Same author

Ion-Pairing Assemblies of Deprotonated Meso-Hydroxyporphyrins as π-Electronic Anions.

Chemistry, an Asian journal·2025
Same author

Multidirectionally Controlled Arrangement via Ion-Pairing Assembly of Amphiphilic Charged π-Electronic Systems.

Small (Weinheim an der Bergstrasse, Germany)·2025
Same author

Ion-Pairing-Modulated Diradical Properties in Partially Conjugated Negatively Charged π-Electronic Systems.

Chemistry (Weinheim an der Bergstrasse, Germany)·2025

Related Experiment Video

Updated: Jan 10, 2026

Multi-analyte Biochip MAB Based on All-solid-state Ion-selective Electrodes ASSISE for Physiological Research
08:03

Multi-analyte Biochip MAB Based on All-solid-state Ion-selective Electrodes ASSISE for Physiological Research

Published on: April 18, 2013

17.8K

π-Electronic Ion Pairs That Form Charge-Segregated Assemblies.

Hiroki Horita1, Rima Sengupta1, Hiromitsu Maeda1

  • 1Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University, Kusatsu, Japan.

Chemistry, an Asian Journal
|November 25, 2025
PubMed
Summary

Researchers developed strategies for stacking identically charged molecules, enabling charge-segregated assemblies. This breakthrough is crucial for creating novel semiconducting materials with tunable electronic and photophysical properties.

Keywords:
charged π‐electronic systemscharge‐segregated assembliesion pairsiπ–iπ interactionsnoncovalent interactions

More Related Videos

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
08:06

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone

Published on: February 23, 2017

8.9K
Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
06:53

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

Published on: July 27, 2018

9.1K

Related Experiment Videos

Last Updated: Jan 10, 2026

Multi-analyte Biochip MAB Based on All-solid-state Ion-selective Electrodes ASSISE for Physiological Research
08:03

Multi-analyte Biochip MAB Based on All-solid-state Ion-selective Electrodes ASSISE for Physiological Research

Published on: April 18, 2013

17.8K
Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone
08:06

Merging Ion Concentration Polarization between Juxtaposed Ion Exchange Membranes to Block the Propagation of the Polarization Zone

Published on: February 23, 2017

8.9K
Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−
06:53

Photoelectron Imaging of Anions Illustrated by 310 Nm Detachment of F−

Published on: July 27, 2018

9.1K

Area of Science:

  • Materials Science
  • Supramolecular Chemistry
  • Organic Electronics

Background:

  • π-Electronic systems self-assemble via noncovalent interactions, leading to unique properties.
  • Charged π-electronic systems form ion-pairing assemblies, typically charge-by-charge, limiting applications requiring charge segregation.

Purpose of the Study:

  • To review recent advances in designing charged π-electronic systems for charge-segregated assemblies.
  • To highlight strategies overcoming electrostatic repulsion for stacking identically charged species.

Main Methods:

  • Molecular design principles focusing on charge delocalization.
  • Extending π-frameworks for enhanced interactions.
  • Precise tuning of noncovalent interactions to control assembly.

Main Results:

  • Successful formation of charge-segregated assemblies through advanced molecular design.
  • Demonstrated ability to stack identically charged species, overcoming electrostatic repulsion.
  • Modulation of electronic, photophysical, and conductive properties in these assemblies.

Conclusions:

  • Novel design strategies enable the formation of charge-segregated π-electronic assemblies.
  • These materials hold significant potential for advanced organic electronic and semiconducting applications.