Video Experimental Relacionado

Updated: Feb 8, 2026

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Synthesis and Characterization of Functionalized Metal-organic Frameworks

Published on: September 5, 2014

Síntesis fácil de marcos orgánicos covalentes magnéticos para extracción en fase sólida magnética dispersiva de

Wenrui Li¹, Yuqi Ji², Yike Dang²

¹School of Food Science and Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China; Linyi Jinluo Win Ray Food Co., Ltd., Linyi 276036, China.

Food research international (Ottawa, Ont.)

|February 7, 2026

Abstract:

In this study, a novel cationic magnetic covalent organic framework (Fe₃O₄@DB-iCOF) was synthesized and applied as an adsorbent in dispersive magnetic solid-phase extraction (DMSPE). The as-prepared material exhibits a high surface positive charge density and uniform pore distribution, offering abundant binding sites for target analytes while maintaining a simple and scalable synthesis procedure. A systematic characterization approach was conducted to evaluate the morphological features, structural properties, and chemical composition of the resulting nanocomposite. The distinct surface charge characteristics of Fe₃O₄@DB-iCOF facilitate efficient and selective extraction of phenolic carboxylic acids (PCAs) through synergistic electrostatic and π-π stacking interactions. When integrated with optimized DMSPE conditions, the developed HPLC-MS/MS method achieved excellent linearity (R² ≥ 0.9986) and low detection limits ranging from 0.003 to 0.05 μg/kg for all target analytes. The method demonstrated satisfactory performance in the analysis of food products derived from broad-leaved plants, yielding recovery rates between 80.96 % and 118.75 %. Notably, this successful application not only presents an innovative strategy for utilizing cationic COFs as magnetic SPE adsorbents but also establishes a robust analytical protocol for the reliable monitoring of PCAs in complex sample matrices.

Palabras clave:

Marcos orgánicos covalentes catiónicos DMSPE Fe(3)O(4)@DB-iCOF HPLC-MS/MS Ácidos fenólicos carboxílicos

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