Preparation and evaluation of novel mesoporous molecular sieve of baicalin surface molecularly imprinted polymers / 中国中药杂志

Taking mesoporous molecular sieve MCM-41 as a substrate, baicalin (BA) as template, acrylamide (AM) as the functional monomer, ethylene glycol dimethacrylate (EGDMA) as a cross-linking agent, ethanol as solvent, under thermal polymerization initiator of azobis isobutyronitrilo (AIBN) , a kind of selective recognition of baicalin surface molecularly imprinted polymer was synthesized. The surface morphologies and characteristics of the MIPs were characterized by infrared spectroscopy (IR) and transmission electron microscope (TEM). The adsorption properties of polymer microsphere for the template were tested by the dynamic adsorption equilibrium experiments and static adsorption equilibrium experiments. The experiment showed that the imprinting process was successfully and the well-ordered one-dimensional pore structure of MCM-41 was still preserved. Furthermore, molecularly imprinted polymers had higher selective ability for BA, then provided a new method for the efficient separation and enrichment of baicalin active ingredients from medicinal plants Scutellaria baicalensis.

Application of computational simulation and spectral analysis in preparation of Tanshinone IIA imprinted polymer / 中草药

To prepare Tanshinone IIA (TSIIA) molecularly imprinted polymers (MIPs) with affinity and high selectivity to TSIIA and study its mechanism. Taking TSIIA as the template molecular, synthesizing the MIPs at the surface of silica nanoparticles by grafting copolymerization in the toluene solution. A molecular modeling approach was used to elucidate template-monomer interaction. The interaction between template molecule and functional monomer was studied by UV spectrometry. The theoretical molar ratio of template-monomer was 1∶3 and methyl acrylic acid (MAA) was a better functional monomer than acrylamide (AAM) for MIPs synthesis. The MIPs can be used for the extraction and separation of TSIIA.