期刊
NANOMATERIALS
卷 9, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/nano9020305
关键词
covalent organic frameworks; quantum dots; molecularly imprinted polymers; solid phase extraction; HPLC-MS; ferulic acid
类别
资金
- National Key Research and Development Program of China [2017YFD0400206]
- National Natural Science Foundation of China [31822040]
- Young Top-Notch Talent of High-Level Innovation and Entrepreneurs Support Program [2017000026833ZK28]
A fluorescence and solid phase extraction (SPE) adsorption nanomaterials of molecularly imprinted polymers (MIPs) based on quantum dot-grafted covalent organic frameworks (QD-grafted COFs) was prepared by one-pot surface-imprinting synthesis method. Amino groups of silane reagent were at the surface of QDs to coordinate COFs efficiently by Schiff-base reactions, providing thermal and chemical stability to MIPs. It also reacted with the phenolic hydroxyl groups of ferulic acid (FA) through non-covalent interactions. The nanomaterials were used as fluorescence sensing and SPE adsorption toward determination of ferulic acid. The MIPs based on QD-grafted COFs had good fluorescence response ability, and quenching linearly at concentrations of ferulic acid from 0.03 to 60 mg kg(-1), with a detection limit of 5 mu g kg(-1). At the same time, it exhibited a good SPE adsorption ability, and the FA extraction was from 1.63 to 3.11 mg kg(-1) in grain by-products by SPE coupled with high performance liquid chromatography/mass spectrometry (HPLC/MS). The fluorescence and SPE-HPLC/MS were used for the efficient detection of ferulic acid in real samples with recovery values of 88-114% and 90-97%, respectively. Furthermore, the nanomaterials of MIPs based on QD-grafted COFs were used for FA detection with high sensitivity and selectivity, and it also increased the recycling of waste resources.
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