Related Experiment Video
Updated: Aug 6, 2026
08:51
Coulomb Explosion Imaging as a Tool to Distinguish Between Stereoisomers
Published on: August 18, 2017
Chiral Quantum-Cutting
Wenting Liu1, Xin Zeng1,2, Wenkai Zhao1
1Frontiers Science Center for New Organic Matter, Tianjin Key Lab for Rare Earth Materials and Applications, Renewable Energy Conversion and Storage Center (RECAST), School of Materials Science and Engineering, National Institute for Advanced Materials, Nankai University, Tianjin 300350, China.
Journal of the American Chemical Society
|July 21, 2026
Summary
Researchers developed a chiral quantum-cutting strategy using rare-earth ion-doped perovskite quantum dots to achieve efficient near-infrared circularly polarized luminescence (NIR-CPL). This breakthrough offers high photoluminescence quantum yield (PLQY) and asymmetry factor (g_lum) for advanced photonic applications.
Area of Science:
- Materials Science
- Photonics
- Quantum Chemistry
Background:
- Near-infrared circularly polarized luminescence (NIR-CPL) is crucial for advanced photonic applications.
- Achieving high photoluminescence quantum yield (PLQY) and asymmetry factor (g_lum) simultaneously in the NIR region is challenging due to the energy-gap law.
Purpose of the Study:
- To propose and demonstrate a chiral quantum-cutting strategy for efficient NIR-CPL.
- To achieve high PLQY and g_lum in rare-earth ion-doped chiral perovskite quantum dots (PeQDs).
Main Methods:
- Development of rare-earth ion-doped chiral perovskite quantum dots (PeQDs).
- Characterization of NIR-CPL properties, including PLQY and g_lum.
- Femtosecond-transient absorption spectroscopy to study energy transfer and spin dynamics.
Main Results:
- Chiral PeQDs exhibited strong NIR-CPL at 985 nm.
- Achieved a large g_lum of 0.092 and high PLQY of 157.2%.
- Exceptional figure of merit (FM) of 0.145, the highest reported for chiral perovskites.
- Confirmed ultrafast energy transfer and efficient spin preservation via the chirality-induced spin selectivity (CISS) effect.
Conclusions:
- Demonstrated a novel chiral quantum-cutting effect and its underlying mechanism involving spin flip and preservation.
- The CISS effect is key to imbalanced spin population and efficient NIR-CPL.
- This work provides a new strategy for designing high-performance NIR-CPL materials and chiral optoelectronic/spintronic devices.
Related Concept Videos
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...
02:05Prochirality
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...
02:30Chirality 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...
02:30Chirality at Nitrogen, Phosphorus, and Sulfur
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...
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...
00:58¹H NMR Chemical Shift Equivalence: Enantiotopic and Diastereotopic Protons
Replacing each alpha-hydrogen in chloroethane by bromine (or a different functional group) yields a pair of enantiomers. Such protons are called prochiral or enantiotopic and are related by a mirror plane. Enantiotopic protons are chemically equivalent in an achiral environment. Because most proton NMR spectra are recorded using achiral solvents, enantiotopic hydrogens yield a single signal.
In chiral compounds such as 2-butanol, replacing the methylene hydrogens at C3 produces a pair of...
In chiral compounds such as 2-butanol, replacing the methylene hydrogens at C3 produces a pair of...