Gas-phase chiral separations by ion mobility spectrometry.

Area of Science:

• Analytical Chemistry
• Separation Science
• Spectrometry

Background:

• Ion mobility spectrometry (IMS) separates gas-phase ions based on size and shape.
• Chiral compounds exist as enantiomers, which are non-superimposable mirror images.
• Separating enantiomers is crucial in pharmaceuticals and biochemistry.

Purpose of the Study:

• To introduce and demonstrate chiral ion mobility spectrometry (CIMS) for enantiomeric separation.
• To showcase the capability of CIMS in separating a diverse range of chiral molecules.

Main Methods:

• Utilized ion mobility spectrometry with a modified drift gas.
• Doped the drift gas with a volatile chiral reagent, (S)-(+)-2-butanol, to create an asymmetric environment.
• Separated enantiomers of pharmaceuticals, amino acids, and carbohydrates in the gas phase.

Main Results:

• Successfully demonstrated gas-phase separation of enantiomers for multiple racemates.
• Achieved chiral discrimination for compounds including atenolol, serine, methionine, and glucose.
• Validated CIMS as an effective technique for enantiomeric analysis.

Conclusions:

• Chiral ion mobility spectrometry (CIMS) provides a powerful method for enantiomeric separation.
• The stereospecific interaction with a chiral dopant enables chiral discrimination in IMS.
• CIMS offers a versatile platform for analyzing chiral molecules across various fields.