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Molecules with Multiple Chiral Centers

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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...

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Related Experiment Video

Updated: Apr 25, 2026

Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers

Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers

Published on: August 18, 2017

Robust chirality through merging BICs.

Jue Li¹, Haoye Qin², Qinghua Song³

¹Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.

Light, Science & Applications

|April 23, 2026

Summary

This summary is machine-generated.

Researchers demonstrate robust chirality using bound states in the continuum (BICs). This method achieves ultrahigh-Q resonances and strong chiroptical responses for advanced optical applications.

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Area of Science:

Optics and Photonics
Condensed Matter Physics

Background:

Bound states in the continuum (BICs) are known for supporting high-quality factor (Q) resonances.
Chirality in optical systems is crucial for applications like polarization control and sensing.
Achieving strong chirality simultaneously with high-Q factors has been a significant challenge.

Purpose of the Study:

To demonstrate a novel mechanism for achieving robust chirality.
To explore the merging of multiple accidental bound states in the continuum (BICs) for enhanced optical properties.
To achieve ultrahigh-Q resonances and strong chiroptical responses in a planar dielectric platform.

Main Methods:

Exploiting the merging of multiple accidental bound states in the continuum (BICs).
Utilizing a planar dielectric platform for optical response.
Analyzing the momentum space for resonance and chiroptical properties.

Main Results:

Demonstrated robust chirality through the merging of BICs.
Achieved ultrahigh-Q factor resonances (~10⁴).
Obtained strong chiroptical responses with near-perfect circular dichroism (~0.99) across a wide momentum space.

Conclusions:

The merging of BICs provides a robust pathway to simultaneously achieve ultrahigh-Q resonances and strong chiroptical effects.
This approach offers a promising platform for developing advanced optical devices with tailored polarization properties.
The demonstrated technique is effective in planar dielectric structures, simplifying fabrication and integration.