Development and evaluation of spherical molecularly imprinted polymer beads

Area of Science:

• Polymer Chemistry
• Materials Science
• Analytical Chemistry

Background:

• Traditional methods for molecularly imprinted polymer (MIP) particle synthesis involve grinding polymer monoliths, which is time-consuming and yields particles with broad size distributions.
• There is a need for rapid and efficient methods to produce spherical MIP beads for various applications.

Purpose of the Study:

• To develop a straightforward and fast method for synthesizing spherical molecularly imprinted polymer beads.
• To investigate the factors influencing the bead synthesis process.
• To evaluate the performance of the synthesized beads in a radioligand assay.

Main Methods:

• A novel method involving droplet formation of pre-polymerization solution in mineral oil followed by photoinduced free-radical polymerization was employed.
• No detergents or stabilizers were required for droplet formation.
• The synthesized beads were characterized and compared with irregularly shaped particles from polymer monoliths.

Main Results:

• Spherical molecularly imprinted polymer beads of propranolol were synthesized in the size range of 1-100 microm in almost quantitative yield.
• The developed method is fast and straightforward, avoiding laborious grinding processes.
• The beads were successfully applied as recognition elements in a 96-well plate radioligand assay for propranolol in human serum.

Conclusions:

• The developed method offers a significant improvement over traditional techniques for MIP bead preparation.
• The synthesized spherical MIP beads are suitable for use in sensitive analytical assays.
• This approach facilitates the development of efficient recognition elements for molecular imprinting applications.