Issue 7, 2023

A boronate-affinity magnetic molecularly imprinted polymer for luteolin recognition

Abstract

In this study, 3-carboxyphenylboronic acid (CP)-functionalized amino-modified Fe3O4 (Fe3O4@NH2-CP, FNC) magnetic molecularly imprinted polymers (FNC@MIPs) were synthesized and applied for the quick identification and selective separation of luteolin (LTL). The structure and morphology were characterized in detail by Fourier transform-infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), dynamic light scattering (DLS), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and vibrating specimen magnetometry (VSM) methods. The FNC@MIPs had a homogeneous shape, excellent magnetic characteristics, quick binding kinetics, a high adsorption capacity, acceptable selectivity, and stable reusability. The solid-phase extraction parameters and preparation conditions were both optimized. Under optimized conditions, the maximal adsorption capacity was 14.26 mg g−1 and the imprinting factor was 3.62. Furthermore, the experimental kinetics data were best fitted with the pseudo-first-order model (R2 = 0.9877), and the Langmuir model could describe the adsorption process (R2 = 0.9979), suggesting a monolayer covering. The practical application of the sorbent for LTL detection in Lonicera japonica Thunb samples showed recoveries in the range of 84.5–108.7%. Therefore, the strategy offers a fresh avenue for the extraction and purification of LTL.

Graphical abstract: A boronate-affinity magnetic molecularly imprinted polymer for luteolin recognition

Article information

Article type
Paper
Submitted
18 Dec 2022
Accepted
10 Jan 2023
First published
10 Jan 2023

Anal. Methods, 2023,15, 925-936

A boronate-affinity magnetic molecularly imprinted polymer for luteolin recognition

L. Ding, Y. Wang, X. Sun, Z. Jiang, X. Wang, Y. Zhou and X. Hou, Anal. Methods, 2023, 15, 925 DOI: 10.1039/D2AY02044K

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