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

Crown Ethers02:36

Crown Ethers

5.1K
Crown ethers are cyclic polyethers that contain multiple oxygen atoms, usually arranged in a regular pattern. The first crown ether was synthesized by Charles Pederson while working at DuPont in 1967. For this work, Pedersen was co-awarded the 1987 Nobel Prize in Chemistry. Crown ethers are named using the formula x-crown-y, where x is the total number of atoms in the ring and y is the number of ether oxygen atoms. The term 'crown' refers to the crown-like shape that these ether...
5.1K
Structural Isomerism02:34

Structural Isomerism

19.1K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
19.1K
Stereoisomerism02:52

Stereoisomerism

11.7K
Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
11.7K
Structure and Nomenclature of Epoxides02:38

Structure and Nomenclature of Epoxides

6.3K
Cyclic ethers are heterocyclic compounds with an oxygen atom in the ring along with carbon atoms. They are named depending on the number of carbon atoms present in their ring system. Cyclic ethers with a three-membered ring system are called “oxirane”, four-membered ring systems as “oxetane”, five-membered ring systems as “oxolane”, and six-membered ring systems as “oxane”. The cyclic structure of these rings imposes angle strain, and this strain...
6.3K
Preparation and Reactions of Sulfides02:26

Preparation and Reactions of Sulfides

4.7K
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
4.7K
Base-Catalyzed Ring-Opening of Epoxides02:26

Base-Catalyzed Ring-Opening of Epoxides

8.2K
Due to their highly strained structures, epoxides can readily undergo ring-opening reactions through nucleophilic substitution, either in the presence of an acid or a base. The nucleophilic substitution reactions in the presence of acid are called acid-catalyzed ring-opening reactions, and nucleophilic substitution reactions in the presence of a base are called base-catalyzed ring-opening reactions. Epoxides undergo base-catalyzed ring-opening reactions in the presence of a strong nucleophile...
8.2K

You might also read

Related Articles

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

Sort by
Same author

Cerebral Small Vessel Disease-driven Inflammatory Cytokines, Brain Structural Alterations, and Cognitive Function: A Mendelian Randomization Study.

Biomedical and environmental sciences : BES·2026
Same author

Metal-Organic Framework Goes Perovskite: A Self-Healing Neutral X-Site Perovskite Ferroelastic Crystal.

Journal of the American Chemical Society·2026
Same author

Reconstructive Phase Transition Enabled Second Harmonic Generation and Switchable Photoluminescence of a Hybrid Metal Halide for Temperature Sensing and Anticounterfeiting.

Inorganic chemistry·2026
Same author

2D chiral organic salts with a large piezoelectric response.

Materials horizons·2026
Same author

H/F Substitution Strategy in 0D Organic-Inorganic Hybrid Metal Cyanides Designing Ferroelastic Phase-Transition Materials.

Inorganic chemistry·2026
Same author

A Ferroelectric Zinc-Based Complex with Ultraviolet Emission.

Inorganic chemistry·2026

Related Experiment Video

Updated: May 28, 2025

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
09:34

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly

Published on: February 6, 2020

7.2K

Two nonlinear optically responsive crown ether inclusion compounds based on a sulfonimide anion assembly.

Yao Zhang1, Yan Juan Wang2, Yuan Yuan Tang2

  • 1Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, People's Republic of China.

Acta Crystallographica. Section C, Structural Chemistry
|February 13, 2025
PubMed
Summary

Researchers developed new organic amine crown ether compounds using benzylammonium cations and novel anions. These compounds exhibit second harmonic generation (SHG) activity, showing promise for nonlinear optical applications.

Keywords:
NLObenzylammoniumcrown ethercrystal structureinclusion complexnonlinear optical responsesulfonimide anion

More Related Videos

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
06:44

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

69.0K
Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
12:21

Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites

Published on: February 6, 2016

12.6K

Related Experiment Videos

Last Updated: May 28, 2025

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
09:34

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly

Published on: February 6, 2020

7.2K
From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding
06:44

From Molecules to Materials: Engineering New Ionic Liquid Crystals Through Halogen Bonding

Published on: March 24, 2018

69.0K
Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites
12:21

Preparation of Monodomain Liquid Crystal Elastomers and Liquid Crystal Elastomer Nanocomposites

Published on: February 6, 2016

12.6K

Area of Science:

  • Crystal Engineering
  • Supramolecular Chemistry
  • Nonlinear Optics (NLO)

Background:

  • Organic amine crown ether supramolecular compounds are vital for functional devices like ferroelectrics and NLO materials.
  • Anilinium cations in these compounds are well-studied, but benzylammonium cations remain less explored.
  • Existing benzylammonium compounds often use inorganic anions, leading to centrosymmetric structures lacking NLO response.

Purpose of the Study:

  • To investigate benzylammonium cations in crown ether inclusion compounds with novel counter-anions.
  • To explore the nonlinear optical properties of these newly synthesized compounds.
  • To expand the range of counter-anions available for crown-ether-based materials.

Main Methods:

  • Synthesized two types of crown ether inclusion compounds: [(BA)(18-crown-6)][DMSA] and [(BA)(18-crown-6)][TfNMs].
  • Characterized the crystal structures, noting crystallization in the polar chiral space group P21.
  • Evaluated the second harmonic generation (SHG) activity of the synthesized compounds.

Main Results:

  • Successfully synthesized and characterized benzylammonium bis(methanesulfonyl)azanide and benzylammonium (methylsulfonyl)(trifluoromethylsulfonyl)azanide crown ether compounds.
  • Both compounds crystallize in the polar chiral space group P21 at 100 K.
  • Both compounds exhibit clear second harmonic generation (SHG) active characteristics.

Conclusions:

  • The synthesized benzylammonium crown ether compounds show potential for quadratic nonlinear optical applications.
  • This study reports the first crown-ether-based compounds utilizing the TfNMs counter-anion.
  • The findings enrich the selection of counter-anions for designing functional crown-ether-based supramolecular materials.