Single Nanoparticle to 3D Supercage: Framing for an Artificial Enzyme System

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• 作者：Ren Cai ; Dan Yang ; Shengjie Peng ; Xigao Chen ; Yun Huang ; Yuan Liu ; Weijia Hou ; Shengyuan Yang ; Zhenbao Liu ; Weihong Tan
• 刊名：Journal of the American Chemical Society
• 出版年：2015
• 出版时间：November 4, 2015
• 年：2015
• 卷：137
• 期：43
• 页码：13957-13963
• 全文大小：590K
• ISSN：1520-5126

文摘

A facile strategy has been developed to fabricate Cu(OH)₂ supercages (SCs) as an artificial enzyme system with intrinsic peroxidase-mimic activities (PMA). SCs with high catalytic activity and excellent recyclability were generated via direct conversion of amorphous Cu(OH)₂ nanoparticles (NPs) at room temperature. More specifically, the process that takes a single nanoparticle to a 3D supercage involves two basic steps. First, with addition of a copper鈥揳mmonia complex, the Cu²⁺ ions that are located on the surface of amorphous Cu(OH)₂ NPs would evolve into a fine lamellar structure by coordination and migration and eventually convert to 1D nanoribbons around the NPs. Second, accompanied by the migration of Cu²⁺, a hollow cavity is generated in the inner NPs, such that a single nanoparticle eventually becomes a nanoribbon-assembled 3D hollow cage. These Cu(OH)₂ SCs were then engineered as an artificial enzymatic system with higher efficiency for intrinsic PMA than the peroxidase activity of a natural enzyme, horseradish peroxidase.