Dummy Templated Receptors Showing Enhanced Affinity for Vitamin D3

Area of Science:

• Analytical Chemistry
• Materials Science
• Biochemistry

Background:

• Accurate determination of Vitamin D3 (VD3) in biological matrices is challenging due to interfering metabolites and limited sorbent selectivity.
• Conventional methods struggle with the hydrophobic nature of VD3, complicating the development of selective molecularly imprinted polymers (MIPs) using VD3 as a direct template.

Purpose of the Study:

• To develop and optimize molecularly imprinted polymers (MIPs) for the selective extraction and quantification of Vitamin D3 (VD3).
• To overcome challenges in MIP synthesis for hydrophobic molecules like VD3 by using a structurally related template.

Main Methods:

• Synthesis of MIPs using hyodeoxycholic acid methyl ester as a template and various functional monomers, including 4-vinylpyridine (4VP) and divinylbenzene (DVB).
• Optimization of monomer ratios (VD3:4VP at 1:4) and investigation of styrene as a co-monomer using UV spectroscopy and computational modeling.
• Evaluation of MIP performance through adsorption capacity, imprinting factor, and thermal stability analysis (TGA).

Main Results:

• MIPs synthesized with 4VP and DVB demonstrated significant binding capacity and imprinting factor for VD3.
• Incorporating styrene as a co-monomer enhanced adsorption capacity but slightly decreased the imprinting factor and thermal stability.
• The prepared MIPs exhibited superior selectivity and recognition capabilities for VD3 compared to non-imprinted polymers.

Conclusions:

• Novel MIPs utilizing a related template offer a viable and selective approach for Vitamin D3 (VD3) extraction.
• The developed MIPs show potential for improving the analytical determination of VD3 in complex biological samples.
• Further optimization could enhance thermal stability and imprinting efficiency for broader analytical applications.