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Chirality in Nature

Chirality 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.

Chirality

Chirality

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...

¹H NMR Chemical Shift Equivalence: Enantiotopic and Diastereotopic Protons

¹H 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...

Chirality at Nitrogen, Phosphorus, and Sulfur

Chirality 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...

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Related Experiment Video

Updated: May 15, 2025

A Micropatterning Assay for Measuring Cell Chirality

A Micropatterning Assay for Measuring Cell Chirality

Published on: March 11, 2022

Chirality Quantification for High-Performance Nanophotonic Biosensors.

Myonghoo Hwang^1,2, Hyeongoo Jung^1,2, Ji-Young Kim^1,2

¹Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY, 12180, USA.

|April 9, 2025

Summary

This summary is machine-generated.

Chiral metabolomics and photonic nanomaterials advance disease biomarker discovery. Quantifying chirality is key to optimizing chiral biosensors for improved diagnostics and personalized medicine.

Keywords:

biosensors chiral material chirality quantification nanophotonics nano‐bio interfaces

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Last Updated: May 15, 2025

A Micropatterning Assay for Measuring Cell Chirality

A Micropatterning Assay for Measuring Cell Chirality

Published on: March 11, 2022

Engineering Molecular Recognition with Bio-mimetic Polymers on Single Walled Carbon Nanotubes

Engineering Molecular Recognition with Bio-mimetic Polymers on Single Walled Carbon Nanotubes

Published on: January 10, 2017

Using Extraordinary Optical Transmission to Quantify Cardiac Biomarkers in Human Serum

Using Extraordinary Optical Transmission to Quantify Cardiac Biomarkers in Human Serum

Published on: December 13, 2017

Area of Science:

Chiral photonics and nanobiotechnology
Metabolomics and biosensing

Background:

Chiral metabolomics enables disease biomarker discovery via enantioselective metabolite measurement.
Chiral photonic nanomaterials offer high-sensitivity platforms for chiral biosensing.
Understanding structure-chirality-optical response relationships is vital for optimizing biosensors.

Purpose of the Study:

To review methods for quantifying chirality.
To highlight the role of chiral quantification in biosensor development.
To explore advanced techniques and future directions for chiral biosensors.

Main Methods:

Examination of quantitative chirality measures: Hausdorff Chirality Measure (HCM), Continuous Chirality Measure (CCM), Osipov-Pickup-Dunmur (OPD), and Graph-Theoretical Chirality (GTC).
Discussion of near-field chiroptical studies for enhanced sensor capabilities.
Analysis of nano-bio interface interactions for next-generation sensing.

Main Results:

Established quantitative measures advance understanding of chirality in materials and biomolecules.
Chiral quantification correlates structural and optical properties with biosensor performance.
Near-field chiroptics and improved nano-bio interfaces show potential for enhanced sensitivity.

Conclusions:

Quantitative chirality measures are crucial for optimizing chiral biosensor design and performance.
Advanced chiroptical techniques and nano-bio interface engineering are key for next-generation biosensing.
This work provides a roadmap for developing highly sensitive and specific chiral biosensors for medical applications.