Related Experiment Video
Updated: Aug 15, 2025
07:14
Synthesis of Bimetallic Pt/Sn-based Nanoparticles in Ionic Liquids
Published on: August 23, 2018
9.1K
Alkynyl-Protected Chiral Bimetallic Ag22 Cu7 Superatom with Multiple Chirality Origins
Guocheng Deng1, Kangjae Lee1, Hongwen Deng2
1Center for Nanoparticle Research, Institute for Basic Science (IBS), School of Chemical and Biological Engineering, and Institute of Chemical Processes, Seoul National University, Seoul, 08826, Republic of Korea.
Angewandte Chemie (International Ed. in English)
|December 29, 2022
Summary
Researchers discovered a chiral silver-copper (AgCu) superatomic cluster with multiple origins of chirality. This finding is crucial for advancing chiroptical and catalytic applications of nanostructured materials.
Area of Science:
- Nanomaterials Science
- Inorganic Chemistry
- Physical Chemistry
Background:
- Chirality in nanostructured materials is vital for chiroptical and catalytic applications.
- Understanding the origins of chirality is key to designing functional nanomaterials.
Purpose of the Study:
- To report a novel chiral silver-copper (AgCu) superatomic cluster.
- To investigate the origins of chirality in this AgCu cluster.
- To explore its potential for chiroptical and catalytic applications.
Main Methods:
- Synthesis and crystal structure determination of the Ag22 Cu7 cluster.
- Structural analysis of the metal core, metal-ligand interface, and ligand layer.
- Circular dichroism spectroscopy using chiral enrichment agents.
- Density Functional Theory (DFT) calculations.
Main Results:
- A chiral AgCu superatomic cluster, [Ag22 Cu7 (C≡CR)16 (PPh3 )5 Cl6 ](PPh4 ), was synthesized and characterized.
- The cluster exhibits multiple origins of chirality, including the metal core, metal-ligand interface, and ligand layer.
- DFT calculations confirmed its superatom nature and chirally active properties.
Conclusions:
- The Ag22 Cu7 cluster presents multiple sources of chirality, offering new avenues for chiral material design.
- This discovery advances the understanding of chirality in nanostructured materials.
- The findings have implications for developing advanced chiroptical and catalytic systems.
More Related Videos
Related Concept Videos
02:25Molecules with Multiple Chiral Centers
12.0K
Molecules that possess multiple chiral centers can afford a large number of stereoisomers. For instance, while some molecules like 2-butanol have one chiral center, defined as a tetrahedral carbon atom with four different substituents attached, several molecules like butane-2,3-diol have multiple chiral centers. A simple formula to predict the number of stereoisomers possible for a molecule with n chiral centers is 2n. However, there can be a lower number where some of the stereoisomers are...
12.0K
02:30Chirality at Nitrogen, Phosphorus, and Sulfur
5.8K
Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
5.8K
02:05Prochirality
3.9K
The concept of prochirality leads to the nomenclature of the individual faces of a molecule and plays a crucial role in the enantioselective reaction. It is a concept where two or more achiral molecules react to produce chiral products. A typical process is the reaction of an achiral ketone to generate a chiral alcohol. Here, the achiral reactant reacts with an achiral reducing agent, sodium borohydride, to generate an equimolar mixture of the chiral enantiomers of the product. For example, an...
3.9K
02:25Chirality
24.8K
Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
24.8K
02:30Chirality in Nature
13.6K
Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.
13.6K
02:33Stereoisomerism of Cyclic Compounds
9.1K
In this lesson, we delve into the role of ring conformation and its stability, which determines the spatial arrangement and, consequently, the molecular symmetry and stereoisomerism of cyclic compounds. 1,2-Dimethylcyclohexane is used as a case study to evaluate the possible number of stereoisomers. Here, given the multiple (n = 2) chiral centers, there are 2n = 4 possible configurations that lack a plane of symmetry, as the ring skeleton exists in a non-planar chair conformation. In addition,...
9.1K