Toward High-Efficient Chiral Separation Using Hierarchically Porous HROP@Silica-Gel-Sheet Composite.

Area of Science:

• Chiral Chemistry
• Materials Science
• Separation Science

Background:

• Enantioseparation of racemates presents significant challenges due to molecular similarities.
• Hierarchically porous materials show potential for enantioseparation but are rarely reported.
• Industrial applications require robust materials without compromising hierarchical structures.

Purpose of the Study:

• To develop a novel, hierarchically porous organic-inorganic composite for efficient enantioseparation.
• To investigate the material's performance in separating various racemic compounds.
• To assess its potential for large-scale industrial applications.

Main Methods:

• Fabrication of a three-dimensional hierarchically porous organic-inorganic composite (HROP@SGS) by integrating hyper-cross-linked resin organic polymer (HROP) with macroporous silica gel sheet (SGS).
• Postmodification with a chiral selector.
• Application of the composite as a filler in solid-phase extraction for racemic mixture separation.

Main Results:

• The HROP@SGS composite demonstrated effective separation of racemic 1-phenylethanol, ibuprofen, and naproxen.
• Complete chiral resolution was achieved using the HROP@SGS material.
• The material maintained its hierarchical architecture during fabrication and application.

Conclusions:

• The developed HROP@SGS composite offers an unprecedented enantioseparation material.
• The strategy of combining chiral micro/mesoporous organic materials with macroporous inorganic substrates is effective.
• This approach holds significant promise for large-scale industrial enantioseparation, including fixed-bed and membrane separations.