Absolute enantioselective separation: optical activity ex machina.

Area of Science:

• Chiral Chemistry
• Separation Science
• Physical Chemistry

Background:

• Chiral compounds exist as enantiomers, often with different biological activities.
• Separating enantiomers is crucial in pharmaceuticals and materials science.
• Current methods often require chiral auxiliaries or complex procedures.

Purpose of the Study:

• To develop a method for absolute enantioselective separation (AES) of racemic mixtures.
• To utilize three independent macroscopic factors to induce chirality.
• To explore the application of AES in microfluidic and surface-based systems.

Main Methods:

• Employing three independent macroscopic factors (e.g., electric fields, surface modifications) to influence molecular orientation.
• Applying these factors simultaneously or consecutively.
• Implementing AES in chromatography-like microfluidic devices and on chemically modified surfaces or mesoporous polymer columns.

Main Results:

• Demonstrated the principle of AES using orthogonal directional influences.
• Estimated separation parameters for microfluidic and surface-based media.
• Established the scalar triple product of directors as a measure of system chirality.

Conclusions:

• AES provides a method for enantioselective separation without chiral additives.
• The developed methodology has potential implications for understanding natural homochirality.
• Microfluidic and surface-based implementations offer practical routes for chiral separations.