Related Experiment Video
Updated: May 28, 2026
10:33
An Electrochemical Cholesteric Liquid Crystalline Device for Quick and Low-Voltage Color Modulation
Published on: February 27, 2019
Organic Cation Conformation-Modulated Dimensionality in Chiral Metal Halides for Enhancing Linear and Nonlinear
Yue Wang1, Junjie Guan1, Puxin Cheng1
1School of Materials Science and Engineering, Tianjin Key Laboratory of Metal and Molecular Materials Chemistry, Frontiers Science Center for New Organic Matter, Academy for Advanced Interdisciplinary Studies, National Key Laboratory of Semiconductor Laser, Nankai University, Tianjin, P. R. China.
Angewandte Chemie (International Ed. in English)
|May 27, 2026
Summary
This study introduces conformational modulation to precisely control organic-inorganic hybrid metal halides (OIHMHs) without altering their chemistry. This method enhances chiroptical properties for advanced optoelectronic applications.
Area of Science:
- Materials Science
- Optoelectronics
- Chemistry
Background:
- Dimensionality engineering is key for tuning organic-inorganic hybrid metal halides (OIHMHs) for optoelectronics.
- Current methods altering chemical composition lack precision.
- A new strategy is needed for fine-tuning OIHMH properties.
Purpose of the Study:
- To develop a conformational modulation strategy for chiral OIHMHs.
- To control self-assembly and dimensionality without chemical changes.
- To enhance linear and nonlinear chiroptical responses.
Main Methods:
- Steering the conformation of cyclic chiral cations (R/S-2-methylpyrrolidinium).
- Designing mixed conformational systems (axial and equatorial).
- Analyzing structural and electronic effects of conformational changes.
Main Results:
- Achieved precise control over inorganic unit connectivity and dimensionality.
- Demonstrated efficient chiral amplification.
- Observed enhanced photoluminescence quantum yield (>86%), high anisotropy factors, and a two-order magnitude increase in second-harmonic generation.
Conclusions:
- Conformational modulation offers precise control over OIHMH structure and properties.
- This strategy enhances both linear and nonlinear chiroptical responses.
- The findings open new avenues for designing high-performance chiral optoelectronic materials.
Keywords:
chiral metal halidescircularly polarized luminescenceconformation modulationdimensionality controlsecond‐harmonic generationMore Related Videos
Related Concept Videos
02:52Stereoisomerism
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...
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...
02:05Prochirality
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...
02:25Chirality
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...
02:25Molecules with Multiple Chiral Centers
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...
02:30Chirality in Nature
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. The...
02:33Stereoisomerism of Cyclic Compounds
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,...