A neutral Cu-based MOF for effective quercetin extraction and conversion from natural onion juice

Rui-Qi Xiang; Yan-Fei Niu; Jie Han; Yat-Long Lau; Hai-Hong Wu; Xiao-Li Zhao

doi:10.1039/C9RA04551A

A neutral Cu-based MOF for effective quercetin extraction and conversion from natural onion juice†

Rui-Qi Xiang,^a Yan-Fei Niu,^a Jie Han,^b Yat-Long Lau,^b Hai-Hong Wu

^a and Xiao-Li Zhao

*^a

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* Corresponding authors

^a Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, P. R. China
E-mail: xlzhao@chem.ecnu.edu.cn
Fax: +86-21-62233179

^b School of Science & Technology, The Open University of Hong Kong, Kowloon, Hong Kong SAR, P. R. China

Abstract

We report herein a new microporous neutral three-dimensional (3D) metal–organic framework [Cu₂(L)(DMF)(H₂O)]·guest (1·guest) composed of copper paddle-wheel and flexible tetracarboxylic acid linkers (DMF = N,N-dimethylformamide, H₄L = tetrakis[(6-carboxynaphthoxy)methyl]methane). Surprisingly, this MOF with neutral cavities can not only extract pure quercetin (QT) but also convert it into Cu–QT during the desorption process. It has been well characterized by UV-vis, IR, ESI-MS and TEM-EDS studies. Moreover, it can efficiently extract natural product QT from fresh QT-rich onion juice and rapidly convert it into Cu–QT with a relatively high conversion rate.

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DOI: https://doi.org/10.1039/C9RA04551A
Article type: Paper
Submitted: 18 Jun 2019
Accepted: 28 Sep 2019
First published: 21 Oct 2019
This article is Open Access

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RSC Adv., 2019,9, 33716-33721

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A neutral Cu-based MOF for effective quercetin extraction and conversion from natural onion juice

R. Xiang, Y. Niu, J. Han, Y. Lau, H. Wu and X. Zhao, RSC Adv., 2019, 9, 33716 DOI: 10.1039/C9RA04551A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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A neutral Cu-based MOF for effective quercetin extraction and conversion from natural onion juice†

Abstract

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A neutral Cu-based MOF for effective quercetin extraction and conversion from natural onion juice

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