Improved Molecular Imprinting Based on Colloidal Particles Made from Miniemulsion: A Case Study on Testosterone and Its Structural Analogues

Evelien Kellens, Hannelore Bové, Matthias Conradi, Lien D'Olieslaeger, Patrick Wagner, Katharina Landfester, Thomas Junkers, Anitha Ethirajan

Research output: Contribution to journalArticleResearchpeer-review

18 Citations (Scopus)

Abstract

Molecularly imprinted polymers (MIPs) in the micron and submicron scale based on the bifunctional cross-linker N,O-bismethacryloylethanolamine (NOBE) have been synthesized using bulk and miniemulsion polymerization, respectively. MIPs with distinct selectivity for the template testosterone were obtained. Colloidal MIP particles made using the miniemulsion technique have significant advantages compared to bulk MIP counterparts owing to their small size, homogeneity, and increased surface, as is demonstrated by optical batch rebinding studies using a nonimprinted polymer (NIP) as a negative control. Affinity and selectivity studies were also performed with the miniemulsion colloidal MIPs. These MIPs display largely increased imprint factors (6.8 vs 2.2) when compared to their bulk MIP counterparts. Further, selectivity studies by using analogue steroids show that colloidal MIPs also display a higher selectivity. In summary, miniemulsion MIPs show much better performance with respect to molecular recognition in aqueous solution, while providing at the same time the possibility for a water-based MIP synthesis.

Original languageEnglish
Pages (from-to)2559-2567
Number of pages9
JournalMacromolecules
Volume49
Issue number7
DOIs
Publication statusPublished - 26 Apr 2016
Externally publishedYes

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