Related Experiment Video
Updated: Jul 12, 2025
06:35
Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
8.2K
Chalcogen and Pnictogen Bonding-Modulated Multiple-Constituent Chiral Self-Assemblies
Yiran Xia1, Aiyou Hao1, Pengyao Xing1
1Key Laboratory of Colloid and Interface Chemistry of Ministry of Education and School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, People's Republic of China.
ACS Nano
|October 31, 2023
Summary
Chalcogen and pnictogen bonding create chiral helical nanotubes from achiral precursors. This method controls supramolecular chirality and optical properties in novel materials.
Area of Science:
- Materials Science
- Supramolecular Chemistry
- Chirality
Background:
- Chalcogen and pnictogen bonding have limited use in controlling supramolecular chirality.
- Developing new methods to control chirality in materials is crucial for advanced applications.
Purpose of the Study:
- To investigate the use of chalcogen and pnictogen bonding for controlling supramolecular chirality.
- To modulate chiral optical properties in a multi-component system.
Main Methods:
- Coassembly of phenyl phosphonium-selenium conjugates with deprotonated amino acids.
- Experimental and computational analyses to evidence bonding interactions and morphological changes.
- Characterization of chiroptical activities such as circular dichroism and circularly polarized luminescence.
Main Results:
- Chalcogen and pnictogen bonding induced transformation from achiral membranes to chiral helical nanotubes.
- Emergence of supramolecular chirality with inverted handedness and tunable chiroptical activities.
- Synergistic bonding stabilized charge-transfer complexation, yielding ternary chiral co-assemblies with enhanced optical properties.
Conclusions:
- Chalcogen and pnictogen bonding are effective in manipulating supramolecular chirality and optics.
- This study expands the fabrication and property-tuning of chiral materials containing Group VA and VIA elements.
Related Concept Videos
02:30Chirality at Nitrogen, Phosphorus, and Sulfur
5.7K
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...
5.7K
02:25Molecules with Multiple Chiral Centers
11.8K
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...
11.8K
02:05Prochirality
3.8K
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...
3.8K
01:19Complexation Equilibria: The Chelate Effect
525
In complexation reactions, metal atoms or cations interact with ligands to form donor-acceptor adducts called metal complexes. Ligands that bind through one donor site are monodentate, ligands with two donor sites are bidentate, and those with more than two donor sites are polydentate ligands. For example, ethylene diamine is a bidentate ligand that binds through two nitrogen donor atoms, forming a five-membered ring. EDTA is a polydentate ligand that binds through four oxygen and two nitrogen...
525
02:51Metal-Ligand Bonds
20.8K
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
20.8K
02:25Chirality
24.3K
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...
24.3K