Selective enrichment‐release of trace dibutyl phthalate via molecular‐imprinting based photo‐controlled switching followed by high‐performance liquid chromatography analysis

Abstract

A novel intelligent photo‐controlled molecularly imprinted polymers were synthesized, based on the magnetic core‐shell structure, with 4‐[(4‐methacryloyloxy) phenylazo] benzenesulfonic acid as the functional monomer and ethylene glycol dimethyl acrylate as the cross‐linking agent. Subsequently, a series of light‐controlled enrichment‐release performance showed that it only took about 30 and 10 min to reach the equilibrium photosensitive characteristic peak, respectively. The photo‐controlled polymers could intelligently select target molecules, the maximum adsorption capacity for dibutyl phthalate was 3.88 mg/g. However, the adsorption capacity for its structural analogue dicyclohexyl phthalate was only 0.88 mg/g. The Freundlich and Langmuir isothermal equations were discussed for the specific enrichment process. Finally, the photo‐controlled molecularly imprinted polymers were successfully applied to the selective detection of dibutyl phthalate, with the recovery rate of 95.4–98.4%. It could be used for the analysis of trace dibutyl phthalate in actual samples.

Efficient removal of dibutyl phthalate from aqueous solutions: recent advances in adsorption and oxidation approaches

“…Additionally, magnetic photo-responsive molecularly imprinted microspheres (PH-Fe 3 O 4 /SiO 2 -MIPs), employing azobenzene derivatives, were also employed for DBP adsorption. 66 The maximum adsorption capacity reached 3.9 mg g −1 with 2.0 g L −1 PH-Fe 3 O 4 /SiO 2 -MIPs in 1.5 h (Table 2), which was approximately 4.2 times higher than that with non-imprinted polymers (NIPs, 0.9 mg g −1 ). The photo-isomerization reversibility of PH-Fe 3 O 4 /SiO 2 -MIPs was achieved by alternating irradiation with monochromatic light at 365 nm and 440 nm, facilitating the release and uptake of DBP.…”

Application of Molecularly Imprinted Polymers in the Analysis of Waters and Wastewaters

“…PAEs are included in a variety of goods packaging, consumer products, toys, medical instruments, and construction materials [152]. PAEs can be released easily from plastic materials into the environment because they are not chemically bonded to the polymer matrix [179]. PAEs are suspected of producing human teratogenic and carcinogenic agents, including at a very low level and as a type of synthetic environmental hormone in water environments [151].…”

Application of molecularly imprinted polymers (MIPs) as environmental separation tools

“…16 Over the past 20 years, a significant number of research works, review articles and other publications have been released on the subject, 17,18 demonstrating their applicability in multiple domains, including catalysis, 19 sensors, 20 solid phase extraction, 21 drug delivery, 22 water and wastewater treatment, environmental and biomedical sensing, 23 and chromatography. 24 Furthermore, computational modeling studies have emerged, advancing the rational design and outcomes of MIPs. 25…”