Molecularly Imprinted Microspheres in Active Compound Separation from Natural Product

Area of Science:

• Polymer Science and Materials Chemistry
• Analytical Chemistry
• Natural Product Chemistry

Background:

• Traditional Molecularly Imprinted Polymers (MIPs) often exhibit irregularities.
• Molecularly Imprinted Microspheres (MIMs) provide an innovative solution with improved selectivity and cost-efficiency for compound extraction.
• MIMs are crosslinked polymers designed with specific binding sites for target molecules, adapting to their shape and size.

Purpose of the Study:

• To review the practical applications of MIMs in the selective extraction of active compounds from natural products.
• To explore the broader development of MIM technology for purifying active compounds.
• To discuss synthesis methods and critical control parameters for effective MIM development.

Main Methods:

• Review of various MIM synthesis techniques including precipitation, suspension, Pickering emulsion, and Controlled/Living Radical Precipitation Polymerization.
• Analysis of critical synthesis parameters: template-to-monomer ratio, solvent, temperature, and polymerization time.
• Examination of specific applications, such as the isolation of aristolochic acids and flavonoids.

Main Results:

• MIMs demonstrate effectiveness and cost-efficiency in capturing target compounds from complex natural product mixtures.
• Suspension polymerization deposition, a type of MIM method, yields homogeneous polymers with enhanced selectivity.
• This method achieves high recovery rates (94.91%–113.53%) and purities (86.3%–122%) with a straightforward, cost-effective process using water as a solvent.

Conclusions:

• MIMs represent a significant advancement over traditional MIPs for selective extraction and purification of natural products.
• The adaptability and controlled synthesis of MIMs make them suitable for diverse analytical applications.
• Suspension polymerization is a viable and efficient method for producing high-performance MIMs.