Facile Synthesis of Enzyme-Embedded Metal–Organic Frameworks for Size-Selective Biocatalysis in Organic Solvent

• Published in: Frontiers in Bioengineering and Biotechnology
• Main Authors: Wang, Yangxin, Zhang, Ningning, Tan, Deming, Qi, Zhenhui, Wu, Changzhu
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2020
• Subjects: biocatalysis; enzymatic reactions; heterogeneous catalysis; metal–organic frameworks; size-selective catalysis; Antarc*; Antarctica
• Online Access: https://portal.findresearcher.sdu.dk/da/publications/2ab34d63-3391-47e5-9a7f-2eba1c5ef3da; https://doi.org/10.3389/fbioe.2020.00714; https://findresearcher.sdu.dk/ws/files/171914249/fbioe_08_00714.pdf

In situ immobilization of enzyme into metal–organic frameworks (MOFs) is performed through a one-step and facile method. Candida antarctica lipase B (CalB) is directly embedded in zeolitic imidazolate framework (ZIF)-8 by simply mixing an aqueous solution of 2-methylimidazole and zinc nitrate hexahydrate [Zn(NO 3 ) 2 ⋅6H 2 O] containing CalB at room temperature. Due to the intrinsic micropores of ZIF-8, the obtained CalB@ZIF composite is successfully applied in size-selective transesterification reaction in organic solvent. CalB@ZIF not only shows much higher catalytic activity but also exhibits higher thermal stability than free CalB. Besides, the robust ZIF-8 shell also offers the hybrid composites excellent reusability.