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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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Stefano Cicchi1, Gennaro Pescitelli, Luisa Lascialfari

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Organic Chemistry

Background:

  • Organogelators are molecules that can form stable gels in organic solvents.
  • Fluorescent dyes with chiral properties are of interest for developing advanced materials.
  • Understanding the self-assembly of chiral molecules is key to controlling material properties.

Purpose of the Study:

  • To characterize an enantiomeric pair of fluorescent dye organogelators.
  • To investigate the properties of gels formed by these organogelators at low concentrations.
  • To explore the phenomenon of enantiomeric discrimination during gel formation.

Main Methods:

  • Differential scanning calorimetry (DSC)
  • Circular dichroism (CD) spectroscopy
  • Atomic force microscopy (AFM)
  • UV-vis absorption and fluorescence spectroscopy
  • Molecular modeling and simulation (DeVoe method)

Main Results:

  • Stable gels were formed at low concentrations from both enantiomers and their mixtures.
  • Analysis revealed distinct properties for gels of individual enantiomers and their mixtures.
  • Molecular modeling supported the helical assembly of gelators and simulated CD spectra.
  • Data suggested an enantiomeric discrimination process occurring during gel formation.

Conclusions:

  • The fluorescent dye organogelators form stable gels in organic solvents.
  • Enantiomeric discrimination occurs during the self-assembly process of these chiral gelators.
  • The findings provide insights into the formation of chiral supramolecular structures.