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

Amines to Amides: Acylation of Amines01:19

Amines to Amides: Acylation of Amines

3.4K
Various carboxylic acid derivatives (such as acid chlorides, esters, and anhydrides) can be used for the acylation of amines to yield amides. The reaction requires two equivalents of amines. The first amine molecule functions as a nucleophile and attacks the carbonyl carbon to produce a tetrahedral intermediate. This is followed by the loss of the leaving group and restoration of the C=O bond.
Next, the second equivalent of amine serves as a Brønsted base and deprotonates the quaternary...
3.4K
Preparation of Amines: Alkylation of Ammonia and Amines01:30

Preparation of Amines: Alkylation of Ammonia and Amines

4.6K
Alkylation is one of the methods used to prepare amines. Direct alkylation of ammonia or a primary amine with an alkyl halide gives polyalkylated amines along with a quaternary ammonium salt through successive SN2 reactions. This process of making the quaternary salt through the direct alkylation method is called exhaustive alkylation.
Each alkylation step makes the nitrogen center more nucleophilic, which triggers successive alkylations until a quaternary ammonium salt is formed. Considering...
4.6K
Preparation of Amines: Reductive Amination of Aldehydes and Ketones01:38

Preparation of Amines: Reductive Amination of Aldehydes and Ketones

3.8K
Carbonyl compounds and primary amines undergo reductive amination first to produce imines, followed by secondary amines in the same reaction mixture, using selective reducing agents like sodium cyanoborohydride or sodium triacetoxyborohydride. Reductive amination produces different degrees of substitution of amines depending on the starting amine substrate.
3.8K
Structure of Amines01:19

Structure of Amines

3.2K
The hybridized nitrogen atom in amines possesses a lone pair of electrons and is bound to three substituents with a bond angle of around 108°, which is less than the tetrahedral angle of 109.5°. However, the C–N–H bond angle is slightly larger at 112°, with a carbon–nitrogen bond length of 147 pm. This carbon–nitrogen bond length of of amines is longer than the carbon–oxygen bond of alcohols (143 pm) but shorter than alkanes’ carbon–carbon bond (154 pm). These aspects are...
3.2K
Amines: Introduction01:07

Amines: Introduction

5.5K
Amines are organic derivatives of ammonia. They are formed by replacing one or more ammonia protons with alkyl or aryl groups. Depending upon the number of organyl groups bonded to nitrogen, amines are classified as primary, secondary, or tertiary. Primary amines have one organyl group attached to the nitrogen atom, while secondary and tertiary amines have two and three organyl groups attached to the nitrogen atom, respectively.
5.5K
Zones of Protection01:16

Zones of Protection

785
In power systems, the entire setup is divided into protective zones to isolate faults and protect the rest of the network. These zones include generators, transformers, buses, transmission lines, distribution lines, and motors. Each zone can be visualized as a separate room in a house, with each room protected by its own circuit breaker.
Protective zones are defined by closed dashed lines, containing one or more components. A key characteristic of these zones is the strategic placement of...
785

You might also read

Related Articles

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

Sort by
Same author

Beyond Geometric Effects: Particle Size-Dependent Electronic Promotion in Ru Catalysts for Ammonia Synthesis.

Journal of the American Chemical Society·2026
Same author

Entropy-Stabilized Aluminate Catalysts That Break the Activity-Stability Tradeoff in CF<sub>4</sub> Hydrolysis.

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

Hierarchical chiral supramolecular assemblies with strong and invertible chiroptical properties.

Science (New York, N.Y.)·2025
Same author

Engineering Amine-Containing Adsorbents for Efficient Carbon Dioxide Capture in Closed-Circuit Escape Respirators.

JACS Au·2025
Same author

Ultrastable Gold Nanostars via Bottlebrush-like Block Copolymers.

ACS applied materials & interfaces·2025
Same author

Ideal Bifunctional Catalysis for Propane Dehydrogenation over Pt-Promoted Gallia-Alumina and Minimized Use of Precious Elements.

Journal of the American Chemical Society·2025

Related Experiment Video

Updated: Jan 26, 2026

A Macrophage Reporter Cell Assay to Examine Toll-Like Receptor-Mediated NF-kB/AP-1 Signaling on Adsorbed Protein Layers on Polymeric Surfaces
07:55

A Macrophage Reporter Cell Assay to Examine Toll-Like Receptor-Mediated NF-kB/AP-1 Signaling on Adsorbed Protein Layers on Polymeric Surfaces

Published on: January 7, 2020

7.8K

SO2-Resistant Amine-Containing CO2 Adsorbent with a Surface Protection Layer.

Chaehoon Kim1, Woosung Choi1, Minkee Choi1

  • 1Department of Chemical and Biomolecular Engineering , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 34141 , Republic of Korea.

ACS Applied Materials & Interfaces
|April 19, 2019
PubMed
Summary

This study introduces a novel method to protect amine adsorbents from sulfur dioxide (SO2) poisoning during carbon dioxide (CO2) capture. By converting surface amines to tertiary amines, SO2 is reversibly adsorbed, preserving CO2 capture efficiency.

Keywords:
CO2 captureSO2-induced degradationamine-based solid adsorbentpolyethyleneiminestability

More Related Videos

In vivo Measurement of the Mouse Pulmonary Endothelial Surface Layer
08:55

In vivo Measurement of the Mouse Pulmonary Endothelial Surface Layer

Published on: February 22, 2013

15.0K
Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
08:12

Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance

Published on: September 5, 2018

16.5K

Related Experiment Videos

Last Updated: Jan 26, 2026

A Macrophage Reporter Cell Assay to Examine Toll-Like Receptor-Mediated NF-kB/AP-1 Signaling on Adsorbed Protein Layers on Polymeric Surfaces
07:55

A Macrophage Reporter Cell Assay to Examine Toll-Like Receptor-Mediated NF-kB/AP-1 Signaling on Adsorbed Protein Layers on Polymeric Surfaces

Published on: January 7, 2020

7.8K
In vivo Measurement of the Mouse Pulmonary Endothelial Surface Layer
08:55

In vivo Measurement of the Mouse Pulmonary Endothelial Surface Layer

Published on: February 22, 2013

15.0K
Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
08:12

Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance

Published on: September 5, 2018

16.5K

Area of Science:

  • Materials Science
  • Chemical Engineering
  • Environmental Science

Background:

  • Amine-containing solids are effective for carbon dioxide (CO2) capture.
  • Sulfur dioxide (SO2) in flue gas irreversibly poisons these adsorbents, reducing their CO2 capture capacity.
  • Developing SO2-resistant CO2 adsorbents is crucial for industrial applications.

Purpose of the Study:

  • To develop a strategy to inhibit SO2 poisoning in amine-based CO2 adsorbents.
  • To enhance the long-term stability and reusability of CO2 adsorbents in the presence of SO2.
  • To investigate the mechanism of SO2 interaction with modified amine surfaces.

Main Methods:

  • Preparation of polyethyleneimine (PEI)-impregnated porous silica adsorbents.
  • Selective external surface alkylation of PEI with epoxide to form tertiary amines.
  • Testing CO2 adsorption-desorption cycles in the presence of SO2.
  • Comparing the performance of modified adsorbents with conventional PEI/silica.

Main Results:

  • The modified adsorbent demonstrated reversible SO2 adsorption on its tertiary amine-rich surface layer.
  • CO2 was subsequently adsorbed onto the underlying PEI layer after SO2 reversibly bound.
  • The adsorbent retained 91.48% of its CO2 adsorption capacity after 1000 cycles with 50 ppm SO2.
  • Conventional PEI/silica showed a severe capacity loss of 65.1% due to irreversible SO2 poisoning.

Conclusions:

  • Selective surface modification of amine adsorbents effectively inhibits SO2 poisoning.
  • Tertiary amines provide a reversible SO2 capture mechanism, protecting the underlying adsorbent.
  • This strategy significantly enhances the durability and reusability of adsorbents for CO2 capture from flue gas.