堆积
化学
多元微积分
多孔性
组合化学
纳米技术
结晶学
有机化学
材料科学
控制工程
工程类
作者
Sherrie L. Heinz-Kunert,Ashma Pandya,Viet Thuc Dang,Phuong Nguyen Tran,Sabari Ghosh,Dan McElheny,Bernard D. Santarsiero,Zhong Ren,Andy I. Nguyen
摘要
The evolution of proteins from simpler, self-assembled peptides provides a powerful blueprint for the design of complex synthetic materials. Previously, peptide–metal frameworks using short sequences (≤3 residues) have shown great promise as proteomimetic materials that exhibit sophisticated capabilities. However, their development has been hindered due to few variable residues and restricted choice of side-chains that are compatible with metal ions. Herein, we developed a noncovalent strategy featuring π-stacking bipyridyl residues to assemble much longer peptides into crystalline frameworks that tolerate even previously incompatible acidic and basic functionalities and allow an unprecedented level of pore variations. Single-crystal X-ray structures are provided for all variants to guide and validate rational design. These materials exhibit hallmark proteomimetic behaviors such as guest-selective induced fit and assembly of multimetallic units. Significantly, we demonstrate facile optimization of the framework design to substantially increase affinity toward a complex organic molecule.
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