Related Experiment Video
Updated: Oct 18, 2025

Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
Amidinium⋯carboxylate frameworks: predictable, robust, water-stable hydrogen bonded materials
1Research School of Chemistry, The Australian National University, Canberra, ACT, Australia. nicholas.white@anu.edu.au.
Amidinium–carboxylate interactions enable predictable synthesis of stable, 3D hydrogen-bonded organic frameworks in water. These materials show promise for enzyme encapsulation and creating 2D nanosheets.
Area of Science:
- Supramolecular Chemistry
- Materials Science
- Organic Chemistry
Background:
- The amidinium–carboxylate interaction is a key supramolecular motif.
- Hydrogen-bonded organic frameworks (HOFs) offer tunable properties.
Purpose of the Study:
- To describe the design and synthesis of 3D HOFs.
- To highlight their stability and applications.
Main Methods:
- Utilizing the amidinium–carboxylate interaction for framework construction.
- Synthesis in aqueous media.
- Characterization of structure and stability.
Main Results:
- Predictable assembly of 3D HOFs.
- Frameworks exhibit remarkable stability in water and polar organic solvents, even upon heating.
- Demonstrated applications in enzyme encapsulation and 2D nanosheet synthesis.
Conclusions:
- Amidinium–carboxylate HOFs are robust and versatile materials.
- Their stability and synthetic accessibility in water make them attractive for various applications.
More Related Videos
08:12Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
Published on: September 5, 2018
12:05Preparation of Hydrophobic Metal-Organic Frameworks via Plasma Enhanced Chemical Vapor Deposition of Perfluoroalkanes for the Removal of Ammonia
Published on: October 10, 2013
Related Concept Videos
Hydrogen Bonds
Structures of Carboxylic Acid Derivatives
Carboxylic acid derivatives contain an acyl group attached to a heteroatom such as chlorine, oxygen, or nitrogen. The carbonyl carbon and oxygen are both sp2-hybridized with an unhybridized p orbital.
The three sp2 orbitals of the carbonyl carbon form three σ bonds, one each with the carbonyl oxygen, the α carbon, and the heteroatom, whereas the other two sp2 orbitals of the carbonyl oxygen are occupied by the lone pairs. Further, the...
Basicity of Aliphatic Amines
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...
Preparation of Amides
The DCC-promoted synthesis of amides begins with the protonation of DCC by carboxylic acid. The protonation makes it a better acceptor. Next, the addition of carboxylate to the protonated carbodiimide gives a reactive acylating agent.
Subsequently, the amine acts as a nucleophile that attacks the acylating agent to form a tetrahedral intermediate. In the...
Amides to Carboxylic Acids: Hydrolysis
Acid-catalyzed hydrolysis:
Hydrolysis of amides under acidic conditions yields carboxylic acids. Since the reaction occurs slowly, hydrolysis requires the conditions of heat.
The mechanism begins with the protonation of the carbonyl oxygen by the acid catalyst. The protonation makes the amide carbonyl carbon more...
Basicity of Heterocyclic Aromatic Amines