Ionic Liquid‐Mediated Dynamic Polymerization for Facile Aqueous‐Phase Synthesis of Enzyme‐Covalent Organic Framework Biocatalysts

Author:

Gao Rui1,Kou Xiaoxue1,Tong Linjing1,Li Zhi‐Wei1,Shen Yujian1,He Rongwei1,Guo Lihong1,Wang Hao1,Ma Xiaomin2,Huang Siming3,Chen Guosheng1ORCID,Ouyang Gangfeng1

Affiliation:

1. MOE Key Laboratory of Bioinorganic and Synthetic Chemistry School of Chemistry Sun Yat-sen University Guangzhou 510275 China

2. Cryo-EM Center Southern University of Science and Technology Shenzhen 518055 China

3. Guangzhou Municipal and Guangdong Provincial Key Laboratory of Molecular Target & Clinical Pharmacology, the NMPA and State Key Laboratory of Respiratory Disease School of Pharmaceutical Sciences and the Fifth Affiliated Hospital Guangzhou Medical University Guangzhou 511436 China

Abstract

AbstractUtilizing covalent organic framework (COF) as a hypotoxic and porous scaffold to encapsulate enzyme (enzyme@COF) has inspired numerous interests at the intersection of chemistry, materials, and biological science. In this study, we report a convenient scheme for one‐step, aqueous‐phase synthesis of highly crystalline enzyme@COF biocatalysts. This facile approach relies on an ionic liquid (2 μL of imidazolium ionic liquid)‐mediated dynamic polymerization mechanism, which can facilitate the in situ assembly of enzyme@COF under mild conditions. This green strategy is adaptive to synthesize different biocatalysts with highly crystalline COF “exoskeleton”, as well evidenced by the low‐dose cryo‐EM and other characterizations. Attributing to the rigorous sieving effect of crystalline COF pore, the hosted lipase shows non‐native selectivity for aliphatic acid hydrolysis. In addition, the highly crystalline linkage affords COF “exoskeleton” with higher photocatalytic activity for in situ production of H2O2, enabling us to construct a self‐cascading photo‐enzyme coupled reactor for pollutants degradation, with a 2.63‐fold degradation rate as the poorly crystalline photo‐enzyme reactor. This work showcases the great potentials of employing green and trace amounts of ionic liquid for one‐step synthesis of crystalline enzyme@COF biocatalysts, and emphasizes the feasibility of diversifying enzyme functions by integrating the reticular chemistry of a COF.

Funder

National Natural Science Foundation of China

China Postdoctoral Science Foundation

Natural Science Foundation of Guangdong Province

Natural Science Foundation of Guangzhou Municipality

Fundamental Research Funds for the Central Universities

Publisher

Wiley

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