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Related Concept Videos

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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.
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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.
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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...
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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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It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
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Updated: Oct 15, 2025

A Micropatterning Assay for Measuring Cell Chirality
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Circularly Polarized Light-Driven Supramolecular Chirality.

Jun Su Kang1, Namhee Kim2, Taehyung Kim2,3

  • 1Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.

Macromolecular Rapid Communications
|October 28, 2021
PubMed
Summary
This summary is machine-generated.

Circularly polarized light (CPL) can induce chirality in supramolecular systems. This review explores how CPL transfers photon chirality to matter, creating and amplifying chiral biases in various materials.

Keywords:
chirality transfercircularly polarized lightsupramolecular chiralitysymmetry breaking

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Area of Science:

  • Supramolecular Chemistry
  • Chirality Studies
  • Photochemistry

Background:

  • Homochirality in nature remains an intriguing phenomenon.
  • Chiral stimuli can introduce asymmetry into supramolecular systems.
  • Circularly polarized light (CPL) is a chiral physical force capable of inducing supramolecular chirality.

Purpose of the Study:

  • To review photon-to-matter chirality transfer mechanisms at the supramolecular level.
  • To discuss the creation and amplification of chiral bias upon CPL irradiation.
  • To outline propagation mechanisms based on photochromic building block nature.

Main Methods:

  • Review of asymmetric photochemical reactions.
  • Analysis of chiral bias induction by CPL.
  • Examination of chirality amplification and propagation mechanisms.

Main Results:

  • CPL can induce and modulate supramolecular chirality through preferential enantiomer interaction.
  • Asymmetric photochemical reactions are key to photon-to-matter chirality transfer.
  • Chiral bias can be amplified and propagated within supramolecular systems.

Conclusions:

  • Photon-to-matter chirality transfer is a viable route to creating chiral supramolecular systems.
  • Understanding these mechanisms offers insights into natural homochirality.
  • Diverse materials like azobenzene derivatives and nanomaterials demonstrate CPL-induced chirality.