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

Aquaporins01:25

Aquaporins

Aquaporins or AQPs are a family of integral membrane proteins whose primary function is to transport water, while some called aquaglyceroporins also transport glycerol. In addition, aquaporins have also been suspected to be involved in transporting volatile substances, such as carbon dioxide and ammonia, across membranes. Such AQPs that act as gas channels are often highly expressed in cells involved in the gaseous exchange, such as red blood cells, epithelial cells, and pulmonary capillaries.
Basicity of Aliphatic Amines01:21

Basicity of Aliphatic Amines

Amines can behave as Brønsted–Lowry bases by accepting a proton from the acid to form corresponding conjugate acids. Due to a lone pair of nonbonding electrons, aliphatic amines can also act as Lewis bases by forming a covalent bond with an electrophile.
To measure the basicity of amines, two conventions are generally used. The first defines Kb as the basicity constant for the deprotonation reaction of water by the amine, as presented in Figure 1. Conventionally, lower Kb indicates higher...
Water: A Bronsted-Lowry Acid and Base02:30

Water: A Bronsted-Lowry Acid and Base

The reaction between a Brønsted-Lowry acid and water is called acid ionization. For example, when hydrogen fluoride dissolves in water and ionizes, protons are transferred from hydrogen fluoride molecules to water molecules, yielding hydronium ions and fluoride ions:
Intermolecular Forces03:13

Intermolecular Forces

Atoms and molecules interact through bonds (or forces): intramolecular and intermolecular. The forces are electrostatic as they arise from interactions (attractive or repulsive) between charged species (permanent, partial, or temporary charges) and exist with varying strengths between ions, polar, nonpolar, and neutral molecules. The different types of intermolecular forces are ion–dipole, dipole–dipole, hydrogen bonds, and dispersion; among these, dipole–dipole, hydrogen bonds, and dispersion...
Ions as Acids and Bases02:54

Ions as Acids and Bases

Salts with Acidic Ions
Salts are ionic compounds composed of cations and anions, either of which may be capable of undergoing an acid or base ionization reaction with water. Aqueous salt solutions, therefore, may be acidic, basic, or neutral, depending on the relative acid-base strengths of the salt’s constituent ions. For example, dissolving the ammonium chloride in water results in its dissociation, as described by the equation:
Titration in Nonaqueous Solvents01:16

Titration in Nonaqueous Solvents

Most acid-base titrations are performed in an aqueous medium. In aqueous titrations, water competes with weaker acids or bases for proton donation or acceptance, leading to ambiguous endpoints in the titration curve. Water also affects the partial ionization of weak acids or bases. For example, water accepts a proton from acetic acid to form hydronium and acetate ions. The hydronium ion formed is a stronger acid than acetic acid, and the acetate ion is a stronger base than water. As a result,...

You might also read

Related Articles

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

Sort by
Same author

Four-colour response to self-sorting of mixed monolayer-protected metal nanoparticles.

Chemical communications (Cambridge, England)·2025
Same author

Light and protonation-controlled complex formation between sulfate ions and a stiff-stilbene based bis(cyclopeptide).

Chemical science·2025
Same author

Sulfonatocalix[4]arene-Based Scavengers for V-Type Nerve Agents with Enhanced Detoxification Activity.

Chemistry (Weinheim an der Bergstrasse, Germany)·2024
Same author

Günter Wulff (1935 -2023): Father of Molecular Imprinting.

Angewandte Chemie (International ed. in English)·2024
Same author

Synthetic Receptors Based on Abiotic Cyclo(pseudo)peptides.

Molecules (Basel, Switzerland)·2022
Same author

When Molecules Meet in Water-Recent Contributions of Supramolecular Chemistry to the Understanding of Molecular Recognition Processes in Water.

ChemistryOpen·2022

Related Experiment Video

Updated: Jun 11, 2026

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

Anion recognition in water.

Stefan Kubik1

  • 1Fachbereich Chemie-Organische Chemie, Technische Universität Kaiserslautern, Erwin-Schrödinger-Straße, D-67663 Kaiserslautern, Germany. kubik@chemie.uni-kl.de

Chemical Society Reviews
|July 10, 2010
PubMed
Summary
This summary is machine-generated.

Synthetic receptors can now effectively recognize anions in water, challenging previous assumptions. This opens new possibilities for anion recognition in competitive aqueous media using diverse receptor designs.

More Related Videos

Neutron Crystallography Data Collection and Processing for Modelling Hydrogen Atoms in Protein Structures
10:10

Neutron Crystallography Data Collection and Processing for Modelling Hydrogen Atoms in Protein Structures

Published on: December 1, 2020

In Situ Characterization of Hydrated Proteins in Water by SALVI and ToF-SIMS
09:48

In Situ Characterization of Hydrated Proteins in Water by SALVI and ToF-SIMS

Published on: February 15, 2016

Related Experiment Videos

Last Updated: Jun 11, 2026

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

Neutron Crystallography Data Collection and Processing for Modelling Hydrogen Atoms in Protein Structures
10:10

Neutron Crystallography Data Collection and Processing for Modelling Hydrogen Atoms in Protein Structures

Published on: December 1, 2020

In Situ Characterization of Hydrated Proteins in Water by SALVI and ToF-SIMS
09:48

In Situ Characterization of Hydrated Proteins in Water by SALVI and ToF-SIMS

Published on: February 15, 2016

Area of Science:

  • Chemistry
  • Supramolecular Chemistry
  • Analytical Chemistry

Background:

  • Anion recognition in water is a long-standing challenge in synthetic chemistry.
  • Historically, effective anion recognition in aqueous solutions relied on positively charged or metal-containing receptors.
  • Neutral receptors were previously thought to be inefficient for anion binding in water.

Purpose of the Study:

  • To review recent advancements in synthetic anion receptor design for aqueous media.
  • To highlight examples of synthetic receptors demonstrating efficient anion recognition in water.
  • To provide guidelines for achieving anion recognition in competitive aqueous environments.

Main Methods:

  • Review of literature on synthetic anion receptors.
  • Analysis of receptor design principles for aqueous environments.
  • Selection of representative examples of successful anion receptors in water.

Main Results:

  • Recent studies show neutral synthetic receptors can achieve efficient anion recognition in water.
  • A broader range of synthetic receptors is now available for aqueous anion recognition.
  • Successful strategies involve specific receptor designs tailored for water.

Conclusions:

  • The assumption of weak interactions for neutral receptors with anions in water is incorrect.
  • Diverse synthetic receptors can be designed for effective anion recognition in competitive aqueous solutions.
  • This review offers guidance for developing new anion recognition systems in water.