Synthesis of surface molecular imprinted polymers based on carboxyl-modified silica nanoparticles with the selective detection of dibutyl phthalate from tap water samples

Synthesis, characterization, and evaluation of selective molecularly imprinted polymers for the fast determination of synthetic cathinones

“…Molecular imprinting is known as an efficient technique for the creation of synthetic specic recognition sites in a polymeric network with a memory of the shape, size and functional group of the template molecules. 16,17 With these superior features, MIPs are widely used for applications including sensing, 18 solid phase extraction, 19 antibody detection, 20 separation and purication technology, 21 food analysis 22 and pharmaceutical analysis. 23 The synthesis methods of MIPs are quite simple and mature such as bulk polymerization, 24 precipitation polymerization, 25 membrane polymerization, 26 electropolymerization, 27,28 multi-step swelling and polymerization and surface-graing polymerization.…”

Selective Immobilization of Highly Valent Radionuclides by Carboxyl Functionalized Mesoporous Silica Microspheres: Batch, XPS, and EXAFS Analyses

“…A new peak appearing at 2938 cm −1 was relevant to the stretching vibration of C−H, while the peaks at about 1724, 1645, and 1409 cm −1 corresponded to the C=O stretching vibration, carboxy C−O deformation vibration, and O−H bands in-plane deformation vibration, respectively, implying the existence of grafted carboxyl groups. 41 Specifically, the characteristic peak at 1558 cm −1 was the hybrid of C−N of the secondary amide stretching vibration and N−H deformation vibration, which could be assigned to the infusion of C−NH 2 groups during the synthetic process. 42 In the XPS survey spectrum of SiO 2 , the characteristic peaks of Si and O elements could be observed in the two samples, while the C 1s peak at 284.80 eV and N 1s peak at 400.08 eV appeared in the XPS spectrum of SiO 2 -COOH (Figure S2b).…”

Vortex-Assisted Dispersive Molecularly Imprinted Polymer-Based Solid Phase Extraction of Acetaminophen from Water Samples Prior to HPLC-DAD Determination

“…The preparation of silicone dioxide was adopted from previous studies [28]. Briefly, about 30 mL of ammonium hydroxide was added to 120 mL of absolute ethanol, and the mixture was stirred at room temperature.…”

“…The synthesis of the MIP was carried out based on the study reported elsewhere [28]. Firstly, 1 g of SiO 2 was dispersed in 100 mL of acetonitrile; afterwards, 1 mmol of acetaminophen (ACT) and 0.5 methacrylic acid (MAA) were added into the solution.…”