Volume 42, Issue 24 pp. 3324-3330
Concise Report

Molecularly Imprinted Porous-Organic Framework with pH-Responsive Adsorption Sites for the Selective Adsorption of Iron

Yajie Yang

Yajie Yang

Key Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Jilin University, Changchun, Jilin, 130022 China

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Fuli Cai

Fuli Cai

Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Northeast Normal University, Changchun, Jilin, 130012 China

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Cheng Zhang

Cheng Zhang

Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Northeast Normal University, Changchun, Jilin, 130012 China

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Nan Gao

Corresponding Author

Nan Gao

Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Northeast Normal University, Changchun, Jilin, 130012 China

E-mail: [email protected]; [email protected]; [email protected]; [email protected]Search for more papers by this author
Suming Zhang

Corresponding Author

Suming Zhang

Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing, 100875 China

E-mail: [email protected]; [email protected]; [email protected]; [email protected]Search for more papers by this author
Guangtong Wang

Corresponding Author

Guangtong Wang

School of Medicine and Health, Harbin Institute of Technology, Harbin, Heilongjiang, 150080 China

E-mail: [email protected]; [email protected]; [email protected]; [email protected]Search for more papers by this author
Ye Yuan

Corresponding Author

Ye Yuan

Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education, Northeast Normal University, Changchun, Jilin, 130012 China

E-mail: [email protected]; [email protected]; [email protected]; [email protected]Search for more papers by this author
First published: 04 September 2024
Citations: 1

Comprehensive Summary

Regulating brain iron metabolism and reducing neuronal ferroptosis is proven to be a potential method for treating Alzheimer's disease (AD). However, gastric juice has a pH of 1.1—2.2 where a large number of interfering ions are dissociated from the food, which in turn causes traditional oral iron chelators to be saturated and inactivated. Herein, poly(4-vinylbenzoic acid) polymer chains were introduced as guided by Fe3+ ion template into the porous network (TpPa-1) via molecularly imprinted technology to obtain porous iron chelators, COOH@TpPa-1. The COOH@TpPa-1 maintains a multiple hydrogen bonding structure to block the channels in the stomach (pH ~1.1—2.2) with a strongly acidic environment, so just a small amount of active sites have been occupied. As COOH@TpPa-1 enters the colon, the alkaline environment disrupts the original hydrogen-bonded structure and forms anionic fragments, the bonding affinity for Fe3+ ions was ~4.0 times that in the stomach, and also gave a high selective coefficient 4.2 times higher than that of conventional iron chelators. These designable "on" and "off" states promote the effective enrichment of iron ions within the colon by the porous chelator and produce a favorable therapeutic effect on Alzheimer's symptoms caused by ferroptosis in mice.

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