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Related Concept Videos

Chirality in Nature02:30

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. The...
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The process of surrounding a solute with solvent is called solvation. It involves evenly distributing the solute within the solvent. The rule of thumb for determining a solvent for a given compound is that like dissolves like. A good solvent has molecular characteristics similar to those of the compound to be dissolved. For example, polar solutions dissolve polar solutes, and apolar solvents dissolve apolar solutes. A polar solvent is a solvent that has a high dielectric constant (ϵ ≥ 15); an...
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A racemic mixture, or racemate, is an equimolar mixture of enantiomers of a molecule that can be separated using their unique interaction with chiral molecules or media. Racemic mixtures are denoted by the (±)- prefix. This ‘optical rotation descriptor’ applies to the whole solution of a racemic mixture rather than a specific stereoisomer. Enantiomers typically have the same physical and chemical properties. Hence, they are not easily separable. However, enantiomers can exhibit different...
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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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Toward Unraveling Solvent-Induced Chirality at the Solid-Liquid Interface.

Sven Bernaerts1,2, Andrea Minoia3, Jie Zhang1,2

  • 1KU Leuven, Department of Chemistry, Division of Molecular Imaging and Photonics, Celestijnenlaan 200F, 3001 Leuven, Belgium.

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Achiral molecules form homochiral networks on surfaces using chiral solvents. This study explores solvent-driven chiral induction at the solid-liquid interface for molecular self-assembly.

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Area of Science:

  • Supramolecular chemistry
  • Surface science
  • Chiral chemistry

Background:

  • Achieving homochirality is crucial for molecular networks.
  • Solvent-induced chiral induction is a promising strategy.
  • Solid-liquid interfaces offer unique environments for self-assembly.

Purpose of the Study:

  • To investigate solvent-driven chiral induction in 2D molecular networks.
  • To understand how enantiopure solvents influence the handedness of self-assembled structures.
  • To compare the efficiency of different chiral solvents in inducing chirality.

Main Methods:

  • Scanning tunneling microscopy (STM) at the liquid-solid interface.
  • Physisorption of achiral molecules (10,12-pentacosadiynoic acid) on graphite.
  • Use of enantiopure citronellyl-derived solvents.
  • Molecular dynamics (MD) simulations.

Main Results:

  • Visualized 2D network formation of achiral molecules in chiral solvents.
  • Demonstrated solvent-driven chiral induction at the solid-liquid interface.
  • Identified differences in induction efficiency among various chiral solvents.
  • Gained molecular-level insights into solvent-mediated chiral induction mechanisms.

Conclusions:

  • Enantiopure solvents can effectively induce homochirality in 2D molecular networks.
  • Solute-solvent interactions play a key role in the efficiency of chiral induction.
  • The solid-liquid interface is a viable platform for studying solvent-mediated chiral self-assembly.