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Molecularly imprinted solid phase extraction (MISPE) has been employed to isolate and concentrate bioactive polyphenols from peanut press waste. To this end, a molecularly imprinted polymer (MIP) templated with the phytoalexin (E)-resveratrol has been prepared via self-assembly with the functional monomer 4-vinylpyridine (4VP) in a 1:3 molar ratio. Subsequent molecular interrogation of the MIP binding sites demonstrated preferential structural selectivity for (E)-resveratrol with respect to other structurally related naturally occurring compounds. This selectivity was subsequently exploited to achieve substantial sample cleanup of peanut press waste under aqueous conditions with significant enrichment of (E)-resveratrol (>60 fold) requiring minimal sample preparation.

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The microwave-mediated synthesis of resveratrol molecularly imprinted polymers is reported. The binding performance of these functional polymers has been evaluated and compared to the corresponding thermally-initiated polymers. The advantages of microwave-synthesis include a 20-fold decrease in polymerisation time, similar binding capacities and enhanced molecular selectivity for resveratrol. These binding data indicate microwave-mediated polymerisation provides superior binding site organization and access.